CAN communication system
Precautions Parts location System information Troubleshooting Circuit diagnosis
NETWORK / COMMUNICATION SYSTEM
CAN COMMUNICATION SYSTEM
PRECAUTIONS
1. If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to 
)
)2. Caution in handling of SRS airbag system (Refer to )
)CAUTION:
This service operation may affect the SRS airbag. Be sure to follow the precautions for SRS airbag during the operation.
3. Caution during harness repair
(1) When repairing the wire, connect the wires using soldering and protect it with tape.
Captions in illustration
| *a |
Soldering and protection with tape |
CAUTION:
·Bus lines (communication lines) must be twisted. Be careful not to make clearance between CAN-H and CAN-L.
·Fray at the connector should be within 8 cm.
·Do not change the line length. (CAN-H and CAN-L must have the same length).
·Fray at the connector should be within 8 cm.
·Do not change the line length. (CAN-H and CAN-L must have the same length).
PARTS LOCATION
SYSTEM DESCRIPTION
1. Summary
(1) CAN (Controller Area Network) is a serial communication network for real time applications. It is an on-vehicle multiplex communication line with high data transmission and error detection function.
(2) CAN communication uses differential voltage signals from a pair of lines: CAN-H and CAN-L (a base voltage is applied to generate potential difference for communication).
(3) Many ECMs (sensors) are equipped onto a vehicle and each of them shares information and links with other ECMs (sensors) via CAN communication.
(4) The main line has two resistors that are necessary for CAN communication.
2. Definitions of terms
(1) Main line
(a) Harness between the two termination circuits on the bus (communication line).
(2) Sub-line
(a) A line branching from the CAN bus main line to an ECM or sensor.
(3) Termination circuit
(a) A circuit, composed of resistor and capacitor, converts the line current to bus voltage. Two termination circuits - one at each end of the main bus line are required.
(4) CAN J/C
(a) J/C for CAN communication.
3. Circuit description
(1) The circuit is configured based on Vbus. (For circuit connection, refer to )
)(2) Each termination circuit on CAN bus has a 120 Ω resistor.
HOW TO TROUBLESHOOT
1. Guidelines
CAUTION:
·If DTC of CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”.
·When a connector is not fully connected, it may case CAN communication failure. To avoid such failure, make sure to perform contact pressure test. (Refer to)
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·When a connector is not fully connected, it may case CAN communication failure. To avoid such failure, make sure to perform contact pressure test. (Refer to
)·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)(1) CAN communication error codes are generated due to errors in the main and sub-lines, ECM in the CAN communication system, sensor internal error, and power supply system error. Since both internal and power supply system errors can occur at the same time, make sure to identify the error source properly.
(2) When the data link connector sub-line or Vbus main line seems to be defective, use an electrical tester to check the data link connector terminals.
CAUTION:
·In checking the data link connector, use SST (diagnosis check wire No. 2), instead of directly connecting the tester probe to the terminal.
·The electrical tester cannot support the open circuit check for the sub-line in each ECM and sensor from data link connector.
·The electrical tester cannot support the open circuit check for the sub-line in each ECM and sensor from data link connector.
(3) In case there was a Vbus communication malfunction, identify the ECM and sensor which had lost communication based on the combination of communication error DTCs.
(4) In case an open circuit is detected, check for a loose or unplugged connection by pushing back the connector case before disconnecting connectors for checking.
(5) After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Bringing in the car
NOTE:
·If the ignition can be turned ON, check DTC, illumination status of combination meter waning light, and vehicle operation status immediately. (Example: Air conditioner operation status)
·Since the failsafe function is partially disabled with IG OFF, do not turn the ignition OFF until the checking is complete.
·If the ignition cannot be turned ON, measure the battery voltage. If the voltage is less than 11 V, charge or replace the battery and start the troubleshooting.
·If the battery voltage is normal and the ignition cannot be turned ON, repair defective parts as required before troubleshooting.
·Since the failsafe function is partially disabled with IG OFF, do not turn the ignition OFF until the checking is complete.
·If the ignition cannot be turned ON, measure the battery voltage. If the voltage is less than 11 V, charge or replace the battery and start the troubleshooting.
·If the battery voltage is normal and the ignition cannot be turned ON, repair defective parts as required before troubleshooting.
Next▼
2.
Interview and phenomenon check
NOTE:
·In order to identify the trouble phenomenon correctly and make an appropriate decision, it is important not to introduce any bias into the troubleshooting process. To understand the circumstances of the failure for proper assessment, the interview with the user plays an important role in the troubleshooting.
·Ask the user if any add-on accessory (anti-theft system, monitor, and so on) is or was installed. (if installed, inform the user that it needs to be removed to check the trouble phenomenon accurately)
·Ask the user if any add-on accessory (anti-theft system, monitor, and so on) is or was installed. (if installed, inform the user that it needs to be removed to check the trouble phenomenon accurately)
(1) Information about the status and condition of the vehicle at the time of trouble is helpful in identifying the defective parts.
NOTE:
·What (system, part, meter warning light)
·How (details of the defect)
·When (date and time, frequency, repeatability)
·Conditions (driving condition, operation condition, weather)
·Road type (inner city, suburbs, paved road, unpaved road, highway, etc.)
·Conditions for recovery (how to recover the error. For example, IG OFF)
·How (details of the defect)
·When (date and time, frequency, repeatability)
·Conditions (driving condition, operation condition, weather)
·Road type (inner city, suburbs, paved road, unpaved road, highway, etc.)
·Conditions for recovery (how to recover the error. For example, IG OFF)
Check list
| Phenomenon |
·Electric power steering effort is: - Normal - A bit heavy - Assist is not working ·Air Conditioner - Was the air conditioner working? - Blower fan is working or not ·Multi information display: - Each display is updated or not ·Smart function: - Does lock or unlock occur? - Does the illumination come on within the smart detection area? ·Other findings related to system operation |
| Meter warning light |
·Warning light status, illuminating order - Slip indicator light ON - ABS warning light ON - Check engine warning light ON - Brake warning light ON - Airbag warning light ON - Others ·Meter display - Shift indicator - Speedmeter - Tachometer (0 r/min fixed?) - Engine coolant temperature gauge (fixed to COLD lower limit?) |
Next▼
3.
Basic inspection (CAN diagnostic is not used)
(1) Check components which may cause CAN communication error. (Refer to )
)NG
>Repair or replace each component.
YES▼
4.
Checking of communication for initializing.
(1) Communicate with the all systems by connecting SSM3.
Criteria
: The communication for initializing is successful for each system. (NG if the communication for initializing is not successful for any of the systems)
NG
>Perform the inspection using “Check sheet of communication for initializing”. (Refer to )
)YES▼
5.
Basic inspection (CAN diagnostic is used)
(1) Check components which may cause CAN communication error. (Refer to )
)NG
>Repair or replace each component.
YES▼
6.
DTC check
(1) Start the engine and read all DTCs.
NOTE:
When the engine does not start, perform the diagnosis for the engine start malfunction.
(2) Record all DTCs and freeze frame data.
| Result |
Go to |
|---|---|
| DTC U**** is displayed |
A |
| DTC U**** is not displayed |
B |
B
> Go to Step 8
A▼
7.
DTC check
(1) Perform the inspection using DTC check sheet.
B
>Go to Step 9
A▼
8.
General diagnostics
(1) Inspect using the “General Diagnostics Table”. (Refer to )
)OK
>LAN system is normal
NG▼
BASIC INSPECTION
1. Inspection without using CAN diagnostic
Before performing diagnostics, confirm the followings which may cause a defect in the body integrated unit.
Before performing diagnostics, confirm the followings which may cause a defect in the body integrated unit.
(1) Measure the battery voltage and check electrolyte.
Standard voltage
: 12 V or more Specific gravity
: 1.260 or more
: 12 V or more Specific gravity
: 1.260 or more
(2) Check the fuse condition.
Make sure that the fuse with specified ampere rating is used and it is not blown out.
Make sure that the fuse with specified ampere rating is used and it is not blown out.
(3) Check the connecting condition of harness and harness connector.
(4) Confirm key illumination does not blink with ignition switch turned ON.
2. Inspection using CAN diagnostic
Before performing diagnostics, confirm the followings which may cause a defect in the body integrated unit.
Before performing diagnostics, confirm the followings which may cause a defect in the body integrated unit.
(1) If the body integrated unit has any settings inconsistent with the vehicle equipment.
(2) If the body integrated unit has any settings inconsistent with the vehicle equipment due to customization.
CHECK USING “CHECK SHEET OF COMMUNICATION FOR INITIALIZING”
·Network diagram
·Check sheet of communication for initializing
| Wiring location |
Type |
Part |
CANH |
CANL |
|---|---|---|---|---|
| No.1 |
Main line |
VDCCM vicinity |
D43-1-A5-26 |
D43-12-A5-14 |
| No.2 |
Main line |
J/C1-J/C2 |
D43-9-A17-6 |
D43-20-A17-17 |
| No.3 |
Main line |
ECM vicinity |
A17-7-A33-19 |
A17-18-A33-18 |
| No.4 |
Sub-line |
Combination meter vicinity |
D43-2-D7-6 |
D43-13-D7-7 |
| No.5 |
Sub-line |
Body integrated unit |
D43-3-D5-14 |
D43-14-D5-13 |
| No.6 |
Sub-line |
Keyless access CM |
D43-4-D41-14 |
D43-15-D41-15 |
| No.7 |
Sub-line |
Data link connector vicinity |
D43-5-D10-6 |
D43-16-D10-14 |
| No.8 |
Sub-line |
Steering angle sensor vicinity |
D43-6-D56-3 |
D43-17-D56-2 |
| No.9 |
Sub-line |
Airbag CM vicinity |
D43-8-D27-13 |
D43-19-D27-22 |
| No.10 |
Sub-line |
A/C CM vicinity |
D43-10-D19-13 |
D43-21-D19-12 |
| No.11 |
Sub-line |
TCM vicinity |
A17-5-A18-29 |
A17-16-A18-28 |
| No.12 |
Sub-line |
Power steering CM vicinity |
A17-8-A15-1 |
A17-19-A15-7 |
| Wiring location |
Type |
Part |
CANH |
CANL |
|---|---|---|---|---|
| No.1 |
Main line |
ECM vicinity |
D43-9-A33-19 |
D43-20-A33-18 |
| No.2 |
Main line |
J/C1-J/C2 |
D43-1-A17-7 |
D43-12-A17-18 |
| No.3 |
Main line |
VDCCM vicinity |
A17-6-A5-26 |
A17-17-A5-14 |
| No.4 |
Sub-line |
A/C CM vicinity |
D43-10-D19-13 |
D43-21-D19-12 |
| No.5 |
Sub-line |
Airbag CM vicinity |
D43-8-D27-13 |
D43-19-D27-22 |
| No.6 |
Sub-line |
Steering angle sensor vicinity |
D43-6-D56-3 |
D43-17-D56-2 |
| No.7 |
Sub-line |
Data link connector vicinity |
D43-5-D10-6 |
D43-16-D10-14 |
| No.8 |
Sub-line |
Keyless access CM |
D43-4-D41-14 |
D43-15-D41-15 |
| No.9 |
Sub-line |
Body integrated unit |
D43-3-D5-14 |
D43-14-D5-13 |
| No.10 |
Sub-line |
Combination meter vicinity |
D43-2-D7-6 |
D43-13-D7-7 |
| No.11 |
Sub-line |
Power steering CM vicinity |
A17-8-A15-1 |
A17-19-A15-7 |
| No.12 |
Sub-line |
TCM vicinity |
A17-5-A18-29 |
A17-16-A18-28 |
Captions in illustration
| (A) |
Installation check |
VDC |
Brake actuator ASSY |
A/B |
Airbag CM |
| (B) |
Communication initialization |
MET |
Combination meter ASSY |
A/C |
Air conditioner amplifier ASSY |
| (C) |
Wiring location |
BIU |
Body integrated unit |
TCM |
Transmission control computer ASSY |
| |
|
KPS |
Collation ECM (Smart key computer ASSY) |
EPS |
Power steering computer ASSY |
| |
|
STR |
Spiral cable SUB-ASSY |
ECM |
Engine control computer |
Procedure
1. Module installation check
·Put “-” mark in the box under the installation check column if the vehicle to be inspected does not have the relevant module.
·Put “-” marks in all blank boxes in the same row that the “-” mark has been placed.
2. SSM3 communication initialization check·Put “-” marks in all blank boxes in the same row that the “-” mark has been placed.
NOTE:
Refer to the sample list.
·Put “O” mark in the box under the communication initialization column if the module succeeded in the communication initialization with Select Monitor. If the communication with all of the modules subject to CAN diagnostic fails, go to (c).
·Put “O” marks in all blank boxes in the same row that the “O” mark has been placed.
·If a wiring location column has one or more boxes with “O” mark, the wiring for that location is normal. Put “O” mark in the box directly under the column with circled number. Put “O” marks in the blank boxes under the column.
·Perform open circuit check for the wiring locations without “O” mark in ascending order. (only for installed modules)
·If the communication remains disabled after checking all harnesses, inspect the module power supply line.
·Implement the basic diagnostic program of the system if the power supply line is normal.
·If the communication remains disabled after implementing the basic diagnostic program, replace the unit.
3. SSM3 communication initialization check (impossible to communicate with any module)·Put “O” marks in all blank boxes in the same row that the “O” mark has been placed.
·If a wiring location column has one or more boxes with “O” mark, the wiring for that location is normal. Put “O” mark in the box directly under the column with circled number. Put “O” marks in the blank boxes under the column.
·Perform open circuit check for the wiring locations without “O” mark in ascending order. (only for installed modules)
·If the communication remains disabled after checking all harnesses, inspect the module power supply line.
·Implement the basic diagnostic program of the system if the power supply line is normal.
·If the communication remains disabled after implementing the basic diagnostic program, replace the unit.
NOTE:
·Refer to the sample list.
·For the wiring locations marked with “-”, they cannot be inspected using the communication for initialization via Select Monitor.
·For the wiring locations marked with “-”, they cannot be inspected using the communication for initialization via Select Monitor.
Identify the faulty part by using example of missing DTC detection.
NOTE:
Perform inspection procedure for the trouble mode indicating that all CAN modules do not communicate. If the communication with any of the modules has been recovered, go to “2. SSM3 communication initialization check”.
·Check for the short circuit to ground. (Refer to )
If it is normal, go to the next.
·Check for the short circuit to battery. (Refer to)
If it is normal, go to the next.
·Perform the inspection procedure for the resistance of Less than 57 Ω (line-to-line short). (Refer to)
If it is normal, go to the next.
·Check for the open circuit of network diagram No. 7 (data link connector).
)If it is normal, go to the next.
·Check for the short circuit to battery. (Refer to
)If it is normal, go to the next.
·Perform the inspection procedure for the resistance of Less than 57 Ω (line-to-line short). (Refer to
)If it is normal, go to the next.
·Check for the open circuit of network diagram No. 7 (data link connector).
Examples: Check sheet of communication for initializing
No.1 is open
No. 2 is open
No. 3 is open
No. 4 is open
No. 5 is open
No. 6 is open
No. 7 is open
No. 8 is open
No. 9 is open
No. 10 is open
No. 11 is open
No. 12 is open
NOTE:
The LHD model can detect based on the missing data detection condition for each module (Refer to “Example of missing DTC detection”)
NOTE:
Perform the procedure described in “3. SSM3 communication initialization check (impossible to communicate with any module)”.
NOTE:
The RHD model can detect based on the missing data detection condition for each module (Refer to “Example of missing DTC detection”)
CHECKING CAN COMMUNICATION CIRCUIT
1. Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·When a connector is not fully connected, it may case CAN communication failure. To avoid such failure, make sure to perform contact pressure test.
·When a connector is not fully connected, it may case CAN communication failure. To avoid such failure, make sure to perform contact pressure test.
1.
Bringing in the car
(1) Use the tester to measure the resistance between terminals.
Captions in illustration
| *1 |
Data link connector |
NG
>Check for ground short. (Refer to )
)OK▼
2.
Checking from data link connector
(1) Use the tester to measure the voltage between terminals.
Captions in illustration
| *1 |
Data link connector |
NG
>Check for short circuit in the battery (Refer to )
)OK▼
3.
Checking from data link connector
(1) Use the tester to measure the resistance between terminals.
Captions in illustration
| *1 |
Data link connector |
A
>A sub-line may be open. Perform the inspection for the resistance between 57 Ω and 63 Ω relevant to the detected DTC. (Refer to 2. list)
B
>Perform the inspection for the resistance of 63 Ω or more. (Refer to )
)C
>Perform the inspection for the resistance of Less than 57 Ω. (Refer to )
)2. List
| Item |
Contents |
Note |
|---|---|---|
| Checking for short to ground |
Refer to “Check for short to ground”. (Refer to ) |
Shorted to ground in the communication circuit or control module. |
| Checking for short to battery |
Refer to “Check for short to battery”. (Refer to ) |
Shorted to battery power supply system in the communication circuit or control module. |
| Less than 57 Ω |
Refer to the inspection for the resistance of less than 57 Ω. (Refer to ) |
CAN-H and CAN-L may be shorted on CAN communication circuit, where the resistance is lower than combined resistance of the terminal resistor. |
| 63 Ω or more |
Refer to the inspection for the resistance of 64 Ω or more. (Refer to ) |
CAN communication circuit may be open on CAN communication circuit, where the resistance is higher than combined resistance of the terminal resistor. |
| Sub-lines 57-63 Ω (Engine control computer system) |
Refer to the inspection for the sub-lines 57-64 Ω (Engine control computer system). (Refer to ) |
The inspection is applied in case of missing or invalid data for the engine control computer. |
| Sub-lines 57-63 Ω (Brake actuator ASSY system) |
Refer to the inspection for the sub-lines 57- 64 Ω (Brake actuator ASSY system). (Refer to ) |
The inspection is applied in case of missing or invalid data for the brake actuator ASSY. |
| Sub-lines 57-63 Ω (Transmission control computer ASSY system) |
Refer to the inspection for the sub-lines 57-64 Ω (Transmission control computer ASSY system). (Refer to ) |
The inspection is applied in case of missing or invalid data for the transmission control computer ASSY. |
| Sub-lines 57-63 Ω (Body integrated unit system) |
Refer to the inspection for the sub-lines 57-65 Ω (Body integrated unit system). (Refer to ) |
The inspection is applied in case of missing or invalid data for the body integrated unit. |
| Sub-lines 57-63 Ω (Spiral cable SUB-ASSY system) |
Refer to the inspection for the sub-lines 57-64 Ω (Spiral cable SUB-ASSY system). (Refer to ) |
The inspection is applied in case of missing or invalid data for the spiral cable SUB-ASSY. |
| Sub-lines 57-63 Ω (Air conditioner amplifier ASSY system) |
Refer to the inspection for the sub-lines 57-64 Ω (A/C control panel system). (Refer to ) |
The inspection is applied in case of missing or invalid data for A/C. |
| Sub-lines 57-63 Ω (Electric power steering computer ASSY system) |
Refer to the inspection for the sub-lines 57-64 Ω (Electric power steering computer ASSY system). (Refer to ) |
The inspection is applied in case of missing or invalid data for the electric power steering. |
| Sub-lines 57-63 Ω (Combination meter ASSY system) |
Refer to the inspection for the sub-lines 57-64 Ω (Combination meter ASSY system). (Refer to ) |
The inspection is applied in case of missing or invalid data for the meter. |
| Sub-lines 57-63 Ω (Airbag system) |
Refer to the inspection for the sub-lines 57-64 Ω (A/B CM system). (Refer to ) |
The inspection is applied in case of missing or invalid data for the airbag. |
| Sub-lines 57-63 Ω (Keyless access system) |
Refer to the inspection for the sub-lines 57-64 Ω (Keyless access system). (Refer to ) |
The inspection is applied in case of missing or invalid data for the collation ECM (Smart key computer ASSY). |
LIST OF DIAGNOSTIC CODES
NOTE:
·SSM3 can be used to display DTC of CAN communication system by ECM.
·For DTCs related to CAN communication system, always start the troubleshooting according to the procedure described in “How to troubleshoot” because the cause cannot be identified only from DTC. (Refer to)
·When the procedure described in “DTC check procedure” is followed, DTC will be displayed only if the error condition is still present.
·For DTCs related to CAN communication system, always start the troubleshooting according to the procedure described in “How to troubleshoot” because the cause cannot be identified only from DTC. (Refer to
)·When the procedure described in “DTC check procedure” is followed, DTC will be displayed only if the error condition is still present.
1. Main body ECM (Multiplex network body computer) integrated unit mode (SSM3 display name)
| DTC |
Diagnostic items (SSM3 display name) |
Status |
DTC detecting conditions |
DTC check procedure |
Warning light |
Retention of DTC |
|---|---|---|---|---|---|---|
| U0073 |
[CAN-HS bus off] |
Communication is disabled due to high-speed CAN communication error |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the main body ECM (Multiplex network body computer) power supply is 10 V or more |
Wait 15 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0100 |
[CAN-HS ECM no-receive data] |
Main body ECM (Multiplex network body computer) remains unable to receive data from the engine control computer. |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the main body ECM (Multiplex network body computer) power supply is 10 V or more |
Wait 15 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0101 |
[CAN-HS TCM no-receive data] |
Main body ECM (Multiplex network body computer) remains unable to receive data from the transmission control computer ASSY. |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the main body ECM (Multiplex network body computer) power supply is 10 V or more |
Wait 15 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0122 |
[CAN-HS VDC no-receive data] |
Main body ECM (Multiplex network body computer) remains unable to receive data from the brake actuator ASSY. |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the main body ECM (Multiplex network body computer) power supply is 10 V or more |
Wait 15 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0155 |
[CAN-HS meter no-receive data] |
Main body ECM (Multiplex network body computer) remains unable to receive data from the combination meter ASSY. |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the main body ECM (Multiplex network body computer) power supply is 10 V or more |
Wait 15 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0164 |
[CAN-HS A/C no-receive data] |
Main body ECM (Multiplex network body computer) remains unable to receive data from the air conditioner amplifier ASSY. |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the main body ECM (Multiplex network body computer) power supply is 10 V or more |
Wait 15 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0327 |
[CAN-HS Collation no-receive data] |
Main body ECM (Multiplex network body computer) remains unable to receive data from the collation ECM (Smart key computer ASSY). |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the main body ECM (Multiplex network body computer) power supply is 10 V or more |
Wait 15 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0401 |
[CAN-HS ECM data abnormal] |
Main body ECM (Multiplex network body computer) detects an error in the data received from the engine control computer |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the main body ECM (Multiplex network body computer) power supply is 10 V or more |
Wait 15 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0402 |
[CAN-HS TCM data abnormal] |
Main body ECM (Multiplex network body computer) detects an error in the data received from the transmission control computer ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the main body ECM (Multiplex network body computer) power supply is 10 V or more |
Wait 15 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0416 |
[CAN-HS VDC data abnormal] |
Main body ECM (Multiplex network body computer) detects an error in the data received from the brake actuator ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the main body ECM (Multiplex network body computer) power supply is 10 V or more |
Wait 15 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0423 |
[CAN-HS meter unit data error] |
Main body ECM (Multiplex network body computer) detects an error in the data received from the combination meter ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the main body ECM (Multiplex network body computer) power supply is 10 V or more |
Wait 15 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0424 |
[CAN-HS A/C data error] |
Main body ECM (Multiplex network body computer) detects an error in the data received from the air conditioner amplifier ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the main body ECM (Multiplex network body computer) power supply is 10 V or more |
Wait 15 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U1201 |
High-speed CAN failure/error counter failure |
Communication is unstable because of high-speed CAN communication error. |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the main body ECM (Multiplex network body computer) power supply is 10 V or more |
Wait 15 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
NOTE:
Diagnosis data is transmitted via CAN communication line.
2. Combination meter ASSY/Combination meter (SSM3 display name)
| DTC |
Diagnostic items (SSM3 display name) |
Status |
DTC detecting conditions |
DTC check procedure |
Warning light |
Retention of DTC |
|---|---|---|---|---|---|---|
| U0073 |
- (Bus off) |
Communication is disabled due to high-speed CAN communication error |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the combination meter ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0100 |
[Lost Communication With EGI] |
Combination meter ASSY remains unable to receive data from the engine control computer |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the combination meter ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0122 |
[Lost Communication with brake ECM] |
Combination meter ASSY remains unable to receive data from the brake actuator ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the combination meter ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0131 |
[Lost Communication With EPS] |
Combination meter ASSY remains unable to receive data from the power steering computer ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the combination meter ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0140 |
[Lost Communication With BIU] |
Combination meter ASSY remains unable to receive data from the main body ECM (Multiplex network body computer) |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the combination meter ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0151 |
[Lost Communication With A/B] |
Combination meter ASSY remains unable to receive data from the airbag sensor ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the combination meter ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
NOTE:
Diagnosis data is transmitted via CAN communication line.
3. Collation ECM (Smart key computer ASSY)/Keyless access system (SSM3 display name)
* Error is detected with IG ON.
| DTC |
Diagnostic items (SSM3 display name) |
Status |
DTC detecting conditions |
DTC check procedure |
Warning light |
Retention of DTC |
|---|---|---|---|---|---|---|
| U0073 |
CAN failure/A system bus OFF detection |
Communication is disabled due to high-speed CAN communication error |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the collation ECM (Smart key computer ASSY) power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0100 |
Missing data for engine |
Collation ECM (Smart key computer ASSY) remains unable to receive data from the engine control computer |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the collation ECM (Smart key computer ASSY) power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0101 |
Lost Communication With TCM |
Collation ECM (Smart key computer ASSY) remains unable to receive data from the transmission control computer ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the collation ECM (Smart key computer ASSY) power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0122 |
Missing data for VDC |
Collation ECM (Smart key computer ASSY) remains unable to receive data from the brake actuator ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the collation ECM (Smart key computer ASSY) power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0140 |
Missing data for body integrated unit |
Collation ECM (Smart key computer ASSY) remains unable to receive data from the main body ECM (Multiplex network body computer) |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the collation ECM (Smart key computer ASSY) power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0155 |
Missing data for meter |
Collation ECM (Smart key computer ASSY) remains unable to receive data from the combination meter ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the collation ECM (Smart key computer ASSY) power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0401 |
Data error from engine |
Collation ECM (Smart key computer ASSY) detects an error in the data received from the engine control computer |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the collation ECM (Smart key computer ASSY) power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0422 |
Data error from body integrated unit |
Collation ECM (Smart key computer ASSY) detects an error in the data received from the main body ECM (Multiplex network body computer) |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the collation ECM (Smart key computer ASSY) power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
NOTE:
Diagnosis data is transmitted via CAN communication line.
4. Engine control computer/Engine (SSM3 display name)
| DTC |
Diagnostic items (SSM3 display name) |
Status |
DTC detecting conditions |
DTC check procedure |
Warning light |
Retention of DTC |
|---|---|---|---|---|---|---|
| U0073 |
CAN failure/A system bus OFF detection |
Communication is disabled due to high-speed CAN communication error |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the engine control computer power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
Check engine light is ON |
Retained until DTC is cleared by the tool |
| U0101 |
Lost Communication With TCM |
Engine control computer remains unable to receive data from the transmission control computer ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the engine control computer power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
Check engine light is ON |
Retained until DTC is cleared by the tool |
| U0122 |
Missing data for VDC |
Engine control computer remains unable to receive data from the brake actuator ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the engine control computer power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
Check engine light is ON |
Retained until DTC is cleared by the tool |
| U0155 |
Missing data for meter |
Engine control computer remains unable to receive data from the combination meter ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the engine control computer power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
Check engine light is ON |
Retained until DTC is cleared by the tool |
| U0402 |
Data error from transmission |
Engine control computer detects an error in the data transmitted to the transmission control computer ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the engine control computer power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
Check engine light is ON |
Retained until DTC is cleared by the tool |
| U0416 |
Data error from VDC |
Engine control computer detects an error in the data received from the brake actuator ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the engine control computer power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
Check engine light is ON |
Retained until DTC is cleared by the tool |
| U0423 |
Data error from meter |
Engine control computer detects an error in the data received from the combination meter ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the engine control computer power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
Check engine light is ON |
Retained until DTC is cleared by the tool |
NOTE:
Diagnosis data is transmitted via CAN communication line.
5. Transmission control computer ASSY/Transmission (SSM3 display name)
| DTC |
Diagnostic items (SSM3 display name) |
Status |
DTC detecting conditions |
DTC check procedure |
Warning light |
Retention of DTC |
|---|---|---|---|---|---|---|
| U0073 |
CAN failure/A system bus OFF detection |
Communication is disabled due to high-speed CAN communication error |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the transmission control computer ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0100 |
Missing data for engine |
Transmission control computer ASSY remains unable to receive data from the engine control computer |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the transmission control computer ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0122 |
Missing data for VDC |
Transmission control computer ASSY remains unable to receive data from the brake actuator ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the transmission control computer ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0140 |
Missing data for body integrated unit |
Transmission control computer ASSY remains unable to receive data from the main body ECM (Multiplex network body computer) |
·One or more second after IG ON ·The voltage of the transmission control computer ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0401 |
Data error from engine |
Transmission control computer ASSY detects an error in the data received from the engine control computer |
·One or more second after IG ON ·The voltage of the transmission control computer ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0416 |
Data error from VDC |
Transmission control computer ASSY detects an error in the data received from the brake actuator ASSY |
·One or more second after IG ON ·The voltage of the transmission control computer ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0422 |
Data error from body integrated unit |
Transmission control computer ASSY detects an error in the data received from the main body ECM (multiplex network body computer) |
·One or more second after IG ON ·The voltage of the transmission control computer ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
NOTE:
Diagnosis data is transmitted via CAN communication line.
6. Brake actuator ASSY/Brake control-ABS/VDC system (SSM3 display name)
| DTC |
Diagnostic items (SSM3 display name) |
Status |
DTC detecting conditions |
DTC check procedure |
Warning light |
Retention of DTC |
|---|---|---|---|---|---|---|
| U0073 |
CAN failure/A system bus OFF detection |
Communication is disabled due to high-speed CAN communication error |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the brake actuator ASSY power supply is 10 V or more |
Wait 60 seconds or more after IG ON |
ABS warning light is ON |
Retained until DTC is cleared by the tool |
| U0100 |
Missing data for engine |
Brake actuator ASSY remains unable to receive data from the engine control computer |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the brake actuator ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
ABS warning light is ON |
Retained until DTC is cleared by the tool |
| U0101 |
Lost Communication With TCM |
Brake actuator ASSY remains unable to receive data from the transmission control computer ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the brake actuator ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
ABS warning light is ON |
Retained until DTC is cleared by the tool |
| U0126 |
Missing data for steering angle sensor |
Brake actuator ASSY remains unable to receive data from the steering sensor (Spiral cable SUB-ASSY) |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the brake actuator ASSY power supply is 10 V or more |
Wait 60 seconds or more after IG ON |
ABS warning light is ON |
Retained until DTC is cleared by the tool |
NOTE:
Diagnosis data is transmitted via CAN communication line.
7. Spiral cable SUB-ASSY (with sensor)/- (SSM3 display name)
NOTE:
Spiral cable SUB-ASSY (with sensor) is connected to CAN communication line but does not output DTC related with CAN communication.
8. Power steering computer ASSY/Power steering (SSM3 display name)
| DTC |
Diagnostic items (SSM3 display name) |
Status |
DTC detecting conditions |
DTC check procedure |
Warning light |
Retention of DTC |
|---|---|---|---|---|---|---|
| U0100 |
Missing data for engine |
Power steering computer ASSY remains unable to receive data from the engine control computer |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the power steering computer ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
EPS warning light is ON |
Retained until DTC is cleared by the tool |
| U0122 |
Missing data for VDC |
Power steering computer ASSY remains unable to receive data from the brake actuator ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the power steering computer ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
EPS warning light is ON |
Retained until DTC is cleared by the tool |
| U0416 |
Data error from VDC |
Power steering computer ASSY detects an error in the data received from the brake actuator ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the power steering computer ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
EPS warning light is ON |
Retained until DTC is cleared by the tool |
NOTE:
Diagnosis data is transmitted via CAN communication line.
9. Air conditioner amplifier ASSY/Air conditioner (SSM3 display name)
| DTC |
Diagnostic items (SSM3 display name) |
Status |
DTC detecting conditions |
DTC check procedure |
Warning light |
Retention of DTC |
|---|---|---|---|---|---|---|
| U0073 |
CAN failure/A system bus OFF detection |
Communication is disabled due to high-speed CAN communication error |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the air conditioner amplifier ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0100 |
Missing data for engine |
Air conditioner amplifier ASSY remains unable to receive data from the engine control computer |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the air conditioner amplifier ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0101 |
Lost Communication With TCM |
Air conditioner amplifier ASSY remains unable to receive data from the transmission control computer ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the air conditioner amplifier ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0122 |
Missing data for VDC |
Air conditioner amplifier ASSY remains unable to receive data from the brake actuator ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the air conditioner amplifier ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0140 |
Missing data for body integrated unit |
Air conditioner amplifier ASSY remains unable to receive data from the main body ECM (Multiplex network body computer) |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the air conditioner amplifier ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0155 |
Missing data for meter |
Air conditioner amplifier ASSY remains unable to receive data from the combination meter ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the air conditioner amplifier ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0401 |
Data error from engine |
Air conditioner amplifier ASSY has been unable to receive data transmitted to the engine control computer for one second or more |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the air conditioner amplifier ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0402 |
Data error from transmission |
Air conditioner amplifier ASSY detects an error in the data received from the transmission control computer ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the air conditioner amplifier ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0416 |
Data error from VDC |
Air conditioner amplifier ASSY detects an error in the data received from the brake actuator ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the air conditioner amplifier ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0422 |
Data error from body integrated unit |
Air conditioner amplifier ASSY detects an error in the data received from the main body ECM (Multiplex network body computer) |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the air conditioner amplifier ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
| U0423 |
Data error from meter |
Air conditioner amplifier ASSY detects an error in the data received from the combination meter ASSY |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the air conditioner amplifier ASSY power supply is 10 V or more |
Wait 10 seconds or more after IG ON |
- |
Retained until DTC is cleared by the tool |
NOTE:
Diagnosis data is transmitted via CAN communication line.
10. Airbag sensor ASSY/Airbag system (SSM3 display name)
| DTC |
Diagnostic items (SSM3 display name) |
Status |
DTC detecting conditions |
DTC check procedure |
Warning light |
Retention of DTC |
|---|---|---|---|---|---|---|
| U0073 |
CAN failure/A system bus OFF detection |
Communication is disabled due to high-speed CAN communication error |
When all of the following conditions are met: ·One or more second after IG ON ·The voltage of the airbag sensor ASSY power supply is 10 V or more |
Wait 60 seconds or more after IG ON |
Airbag warning light is ON |
Retained until DTC is cleared by the tool |
NOTE:
Diagnosis data is transmitted via CAN communication line.
Check using DTC check sheet
·DTC check sheet
Captions in illustration
| (A) |
Installation check |
VDC |
Brake actuator ASSY |
A/B |
Airbag CM |
| (B) |
Bus off detection |
MET |
Combination meter ASSY |
A/C |
Air conditioner amplifier ASSY |
| (C) |
Missing data detection |
BIU |
Body integrated unit |
TCM |
Transmission control computer ASSY |
| (D) |
Data error detection |
KPS |
Collation ECM (Smart key computer ASSY) |
EPS |
Power steering computer ASSY |
| |
|
STR |
Spiral cable SUB-ASSY |
ECM |
Engine control computer |
Procedure
1. Module installation check
·Put “-” mark in the box under the installation check column if the vehicle to be inspected does not have the relevant module.
·Put “-” marks in all blank boxes in the same row that the “-” mark has been placed.
2. Bus off detection and missing data detection·Put “-” marks in all blank boxes in the same row that the “-” mark has been placed.
NOTE:
DTC will not be displayed if CAN diagnostic module has an open harness which causes missing data, etc. (current malfunction). In this case, perform an inspection according to “Check using the check sheet of communication for initializing”, and then use the following sheet to confirm that it has changed to a past malfunction.
·In the check sheet, put “×” in the box under the DTCs detected by each module.
·Identify and repair the faulty part by referring to the example of missing DTC detection. (Refer to the example of missing DTC detection)
3. Data error detection·Identify and repair the faulty part by referring to the example of missing DTC detection. (Refer to the example of missing DTC detection)
NOTE:
If the P.B.C code is detected when starting the engine again, perform the diagnosis of the P.B.C code.
If bus off and missing data are present, perform the diagnosis for these problems first.
·If more than one module detects DTC for the same module, replace the module being detected.
·If only one module detects DTC, replace the module being detected.
·If DTC recurs, re-install the module which has been replaced, and replace the module which detected DTC.
·If DTC recurs, replace both modules.
·If only one module detects DTC, replace the module being detected.
·If DTC recurs, re-install the module which has been replaced, and replace the module which detected DTC.
·If DTC recurs, replace both modules.
Example of missing DTC detection
Network diagram
For RHD model, No. 8 is open. For LHD model, No. 6 is open.
| Wiring location |
Type |
Part |
CANH |
CANL |
|---|---|---|---|---|
| No.1 |
Main line |
VDCCM vicinity |
D43-1-A5-26 |
D43-12-A5-14 |
| No.2 |
Main line |
J/C1-J/C2 |
D43-9-A17-6 |
D43-20-A17-17 |
| No.3 |
Main line |
ECM vicinity |
A17-7-A33-19 |
A17-18-A33-18 |
| No.4 |
Sub-line |
Combination meter vicinity |
D43-2-D7-6 |
D43-13-D7-7 |
| No.5 |
Sub-line |
Body integrated unit |
D43-3-D5-14 |
D43-14-D5-13 |
| No.6 |
Sub-line |
Keyless access CM |
D43-4-D41-14 |
D43-15-D41-15 |
| No.7 |
Sub-line |
Data link connector vicinity |
D43-5-D10-6 |
D43-16-D10-14 |
| No.8 |
Sub-line |
Steering angle sensor vicinity |
D43-6-D56-3 |
D43-17-D56-2 |
| No.9 |
Sub-line |
Airbag CM vicinity |
D43-8-D27-13 |
D43-19-D27-22 |
| No.10 |
Sub-line |
A/C CM vicinity |
D43-10-D19-13 |
D43-21-D19-12 |
| No.11 |
Sub-line |
TCM vicinity |
A17-5-A18-29 |
A17-16-A18-28 |
| No.12 |
Sub-line |
Power steering CM vicinity |
A17-8-A15-1 |
A17-19-A15-7 |
| Wiring location |
Type |
Part |
CANH |
CANL |
|---|---|---|---|---|
| No.1 |
Main line |
ECM vicinity |
D43-9-A33-19 |
D43-20-A33-18 |
| No.2 |
Main line |
J/C1-J/C2 |
D43-1-A17-7 |
D43-12-A17-18 |
| No.3 |
Main line |
VDCCM vicinity |
A17-6-A5-26 |
A17-17-A5-14 |
| No.4 |
Sub-line |
A/C CM vicinity |
D43-10-D19-13 |
D43-21-D19-12 |
| No.5 |
Sub-line |
Airbag CM vicinity |
D43-8-D27-13 |
D43-19-D27-22 |
| No.6 |
Sub-line |
Steering angle sensor vicinity |
D43-6-D56-3 |
D43-17-D56-2 |
| No.7 |
Sub-line |
Data link connector vicinity |
D43-5-D10-6 |
D43-16-D10-14 |
| No.8 |
Sub-line |
Keyless access CM |
D43-4-D41-14 |
D43-15-D41-15 |
| No.9 |
Sub-line |
Body integrated unit |
D43-3-D5-14 |
D43-14-D5-13 |
| No.10 |
Sub-line |
Combination meter vicinity |
D43-2-D7-6 |
D43-13-D7-7 |
| No.11 |
Sub-line |
Power steering CM vicinity |
A17-8-A15-1 |
A17-19-A15-7 |
| No.12 |
Sub-line |
TCM vicinity |
A17-5-A18-29 |
A17-16-A18-28 |
11. DTC matrix table
(1) For the past communication malfunctions of the ECMs and sensors connected to Vbus, the defective part can be identified based on the following matrix tables.
NOTE:
·Use the matrix table below to identify the part which has lost communication according to the DTC output by each ECM connected to CAN communication line.
·For diagnosis of open circuit in sub-line and lost communication, use “Check sheet of communication for initializing”. The check sheet enables quick identification of a defective part because if an ECM or sensor is connected to an open sub-line, it will not respond.
·For diagnosis of open circuit in sub-line and lost communication, use “Check sheet of communication for initializing”. The check sheet enables quick identification of a defective part because if an ECM or sensor is connected to an open sub-line, it will not respond.
| Diagnosis result |
Description |
||||
|---|---|---|---|---|---|
| Source ECM |
DTC output |
Sub-lines 57-63 Ω (Transmission control computer ASSY system) (Refer to ) |
Sub-lines 57-63 Ω (Brake actuator ASSY system) (Refer to ) |
Sub-lines 57-63 Ω (Spiral cable SUB-ASSY system) (Refer to ) |
Sub-lines 57-63 Ω (Engine control computer system) (Refer to ) |
| Transmission control computer ASSY |
U0073 |
O*1 |
× |
× |
× |
| U0100 |
O*1 |
× |
× |
O |
|
| U0122 |
O*1 |
O |
× |
× |
|
| U0140 |
O*1 |
× |
× |
× |
|
| U0401 |
×*1 |
× |
× |
× |
|
| U0416 |
×*1 |
× |
× |
× |
|
| U0422 |
×*1 |
× |
× |
× |
|
| Brake actuator ASSY |
U0073 |
× |
O*1 |
× |
× |
| U0100 |
× |
O*1 |
× |
O |
|
| U0101 |
O |
O*1 |
× |
× |
|
| U0126 |
× |
O*1 |
O |
× |
|
| Engine control computer |
U0073 |
× |
× |
× |
O*1 |
| U0101 |
O |
× |
× |
O*1 |
|
| U0122 |
× |
O |
× |
O*1 |
|
| U0155 |
× |
× |
× |
O*1 |
|
| U0402 |
× |
× |
× |
×*1 |
|
| U0416 |
× |
× |
× |
×*1 |
|
| U0423 |
× |
× |
× |
×*1 |
|
| Airbag sensor ASSY |
U0073 |
× |
× |
× |
× |
| Power steering computer ASSY |
U0100 |
× |
× |
× |
O |
| U0122 |
× |
O |
× |
× |
|
| U0416 |
× |
× |
× |
× |
|
| Air conditioner amplifier ASSY |
U0073 |
× |
× |
× |
× |
| U0100 |
× |
× |
× |
O |
|
| U0101 |
O |
× |
× |
× |
|
| U0122 |
× |
O |
× |
× |
|
| U0140 |
× |
× |
× |
× |
|
| U0155 |
× |
× |
× |
× |
|
| U0401 |
× |
× |
× |
× |
|
| U0402 |
× |
× |
× |
× |
|
| U0416 |
× |
× |
× |
× |
|
| U0422 |
× |
× |
× |
× |
|
| U0423 |
× |
× |
× |
× |
|
| Combination meter ASSY |
U0073 |
× |
× |
× |
× |
| U0100 |
× |
× |
× |
O |
|
| U0122 |
× |
O |
× |
× |
|
| U0131 |
× |
× |
× |
× |
|
| U0140 |
× |
× |
× |
× |
|
| U0151 |
× |
× |
× |
× |
|
| Collation ECM (Smart key computer ASSY) |
U0073 |
× |
× |
× |
× |
| U0100 |
× |
× |
× |
O |
|
| U0101 |
O |
× |
× |
× |
|
| U0122 |
× |
O |
× |
× |
|
| U0140 |
× |
× |
× |
× |
|
| U0155 |
× |
× |
× |
× |
|
| U0401 |
× |
× |
× |
× |
|
| U0422 |
× |
× |
× |
× |
|
| Main body ECM (Multiplex network body computer) |
U0073 |
× |
× |
× |
× |
| U0100 |
× |
× |
× |
O |
|
| U0101 |
O |
× |
× |
× |
|
| U0122 |
× |
O |
× |
× |
|
| U0155 |
× |
× |
× |
× |
|
| U0164 |
× |
× |
× |
× |
|
| U0327 |
× |
× |
× |
× |
|
| U0401 |
× |
× |
× |
× |
|
| U0402 |
× |
× |
× |
× |
|
| U0416 |
× |
× |
× |
× |
|
| U0423 |
× |
× |
× |
× |
|
| U0424 |
× |
× |
× |
× |
|
| U1201 |
× |
× |
× |
× |
|
| Diagnosis result |
Description |
||||
|---|---|---|---|---|---|
| Source ECM |
DTC output |
Sub-lines 57-63 Ω (A/B CM system) (Refer to ) |
Sub-lines 57-63 Ω (Electric power steering system) (Refer to ) |
Sub-lines 57-63 Ω (Air conditioner amplifier ASSY system) (Refer to ) |
Sub-lines 57-63 Ω (Combination meter ASSY system) (Refer to ) |
| Transmission control computer ASSY |
U0073 |
× |
× |
× |
× |
| U0100 |
× |
× |
× |
× |
|
| U0122 |
× |
× |
× |
× |
|
| U0140 |
× |
× |
× |
× |
|
| U0401 |
× |
× |
× |
× |
|
| U0416 |
× |
× |
× |
× |
|
| U0422 |
× |
× |
× |
× |
|
| Brake actuator ASSY |
U0073 |
× |
× |
× |
× |
| U0100 |
× |
× |
× |
× |
|
| U0101 |
× |
× |
× |
× |
|
| U0126 |
× |
× |
× |
× |
|
| Engine control computer |
U0073 |
× |
× |
× |
× |
| U0101 |
× |
× |
× |
× |
|
| U0122 |
× |
× |
× |
× |
|
| U0155 |
× |
× |
× |
O |
|
| U0402 |
× |
× |
× |
× |
|
| U0416 |
× |
× |
× |
× |
|
| U0423 |
× |
× |
× |
× |
|
| Airbag sensor ASSY |
U0073 |
O*1 |
× |
× |
× |
| Power steering computer ASSY |
U0100 |
× |
O*1 |
× |
× |
| U0122 |
× |
O*1 |
× |
× |
|
| U0416 |
× |
×*1 |
× |
× |
|
| Air conditioner amplifier ASSY |
U0073 |
× |
× |
O*1 |
× |
| U0100 |
× |
× |
O*1 |
× |
|
| U0101 |
× |
× |
O*1 |
× |
|
| U0122 |
× |
× |
O*1 |
× |
|
| U0140 |
× |
× |
O*1 |
× |
|
| U0155 |
× |
× |
O*1 |
O |
|
| U0401 |
× |
× |
×*1 |
× |
|
| U0402 |
× |
× |
×*1 |
× |
|
| U0416 |
× |
× |
×*1 |
× |
|
| U0422 |
× |
× |
×*1 |
× |
|
| U0423 |
× |
× |
×*1 |
× |
|
| Combination meter ASSY |
U0073 |
× |
× |
× |
O*1 |
| U0100 |
× |
× |
× |
O*1 |
|
| U0122 |
× |
× |
× |
O*1 |
|
| U0131 |
× |
O |
× |
O*1 |
|
| U0140 |
× |
× |
× |
O*1 |
|
| U0151 |
O |
× |
× |
O*1 |
|
| Collation ECM (Smart key computer ASSY) |
U0073 |
× |
× |
× |
× |
| U0100 |
× |
× |
× |
× |
|
| U0101 |
× |
× |
× |
× |
|
| U0122 |
× |
× |
× |
× |
|
| U0140 |
× |
× |
× |
× |
|
| U0155 |
× |
× |
× |
O |
|
| U0401 |
× |
× |
× |
× |
|
| U0422 |
× |
× |
× |
× |
|
| Main body ECM (Multiplex network body computer) |
U0073 |
× |
× |
× |
× |
| U0100 |
× |
× |
× |
× |
|
| U0101 |
× |
× |
× |
× |
|
| U0122 |
× |
× |
× |
× |
|
| U0155 |
× |
× |
× |
O |
|
| U0164 |
× |
× |
O |
× |
|
| U0327 |
× |
× |
× |
× |
|
| U0401 |
× |
× |
× |
× |
|
| U0402 |
× |
× |
× |
× |
|
| U0416 |
× |
× |
× |
× |
|
| U0423 |
× |
× |
× |
× |
|
| U0424 |
× |
× |
× |
× |
|
| U1201 |
× |
× |
× |
× |
|
| Diagnosis result |
Description |
||
|---|---|---|---|
| Source ECM |
DTC output |
Sub-lines 57-63 Ω (Keyless access system) (Refer to ) |
Sub-lines 57-63 Ω (Body integrated system) (Refer to ) |
| Transmission control computer ASSY |
U0073 |
× |
× |
| U0100 |
× |
× |
|
| U0122 |
× |
× |
|
| U0140 |
× |
O |
|
| U0401 |
× |
× |
|
| U0416 |
× |
× |
|
| U0422 |
× |
× |
|
| Brake actuator ASSY |
U0073 |
× |
× |
| U0100 |
× |
× |
|
| U0101 |
× |
× |
|
| U0126 |
× |
× |
|
| Engine control computer |
U0073 |
× |
× |
| U0101 |
× |
× |
|
| U0122 |
× |
× |
|
| U0155 |
× |
× |
|
| U0402 |
× |
× |
|
| U0416 |
× |
× |
|
| U0423 |
× |
× |
|
| Airbag sensor ASSY |
U0073 |
× |
× |
| Power steering computer ASSY |
U0100 |
× |
× |
| U0122 |
× |
× |
|
| U0416 |
× |
× |
|
| Air conditioner amplifier ASSY |
U0073 |
× |
× |
| U0100 |
× |
× |
|
| U0101 |
× |
× |
|
| U0122 |
× |
× |
|
| U0140 |
× |
O |
|
| U0155 |
× |
× |
|
| U0401 |
× |
× |
|
| U0402 |
× |
× |
|
| U0416 |
× |
× |
|
| U0422 |
× |
× |
|
| U0423 |
× |
× |
|
| Combination meter ASSY |
U0073 |
× |
× |
| U0100 |
× |
× |
|
| U0122 |
× |
× |
|
| U0131 |
× |
× |
|
| U0140 |
× |
O |
|
| U0151 |
× |
× |
|
| Collation ECM (Smart key computer ASSY) |
U0073 |
O*1 |
× |
| U0100 |
O*1 |
× |
|
| U0101 |
O*1 |
× |
|
| U0122 |
O*1 |
× |
|
| U0140 |
O*1 |
O |
|
| U0155 |
O*1 |
× |
|
| U0401 |
×*1 |
× |
|
| U0422 |
×*1 |
× |
|
| Main body ECM (Multiplex network body computer) |
U0073 |
× |
O*1 |
| U0100 |
× |
O*1 |
|
| U0101 |
× |
O*1 |
|
| U0122 |
× |
O*1 |
|
| U0155 |
× |
O*1 |
|
| U0164 |
× |
O*1 |
|
| U0327 |
O |
O*1 |
|
| U0401 |
× |
×*1 |
|
| U0402 |
× |
×*1 |
|
| U0416 |
× |
×*1 |
|
| U0423 |
× |
×*1 |
|
| U0424 |
× |
×*1 |
|
| U1201 |
× |
×*1 |
|
NOTE:
·O: DTC is output
·×: DTC may be output if either end of the sub-line is open
·*1: DTC cannot be output in case of lost communication
·In case of an open circuit in the CAN bus main line, short circuit between CAN bus lines (CAN-H and CAN-L), CAN bus +B short, or CAN bus GND short, many DTCs may be output by most ECMs (or sensors) on CAN bus or several communication error messages may be displayed on SSM3. To solve this problem, start the inspection using “Check sheet of communication for initializing.”. (Refer to)
·In case of either end of the CAN bus sub-line is open, irrelevant DTCs may be output (DTC may not be displayed properly) or communication error messages may be displayed on SSM3.
·×: DTC may be output if either end of the sub-line is open
·*1: DTC cannot be output in case of lost communication
·In case of an open circuit in the CAN bus main line, short circuit between CAN bus lines (CAN-H and CAN-L), CAN bus +B short, or CAN bus GND short, many DTCs may be output by most ECMs (or sensors) on CAN bus or several communication error messages may be displayed on SSM3. To solve this problem, start the inspection using “Check sheet of communication for initializing.”. (Refer to
)·In case of either end of the CAN bus sub-line is open, irrelevant DTCs may be output (DTC may not be displayed properly) or communication error messages may be displayed on SSM3.
12. CAN bus waveform
NOTE:
·CAN bus waveform is obtained by measuring signals between CANH-GND terminals and between CANL-GND terminals of the data link connector. (Use as a reference of the diagnostics of CAN communication line)
·If multiple ECMs seem to be defective based on “Bus diagnosis” of SSM3 and DTC, perform resistance inspection on CAN bus (Refer to) first. If no abnormal condition is detected, then check the waveform by following the procedure described below.
·If the waveform is similar to none of the three waveforms (Group 1), possible defects include open circuit in CAN bus main line, open circuit on either end of CAN bus sub-line, and CAN bus (CAN-H or CAN-L) shorted to GND (Group 2).
·Check whether the waveform is disturbed when the connector and wiring harness is swayed vertically and horizontally.
·If multiple ECMs seem to be defective based on “Bus diagnosis” of SSM3 and DTC, perform resistance inspection on CAN bus (Refer to
) first. If no abnormal condition is detected, then check the waveform by following the procedure described below.·If the waveform is similar to none of the three waveforms (Group 1), possible defects include open circuit in CAN bus main line, open circuit on either end of CAN bus sub-line, and CAN bus (CAN-H or CAN-L) shorted to GND (Group 2).
·Check whether the waveform is disturbed when the connector and wiring harness is swayed vertically and horizontally.
(1) CAN bus waveform (Group 1)
(a) Normal waveform
(b) Open circuit in both lines of one of ECM sub-lines (both CAN-H and CAN-L)
NOTE:
·If an ECM or sensor is connected to CAN bus sub-line with open circuit in both lines, the signal will disappear (indicated by dotted line). (the signals from other ECMs and sensors are displayed normally).
·The waveform is similar to the normal waveform. The defective part can be identified by CAN bus check procedure.
·The waveform is similar to the normal waveform. The defective part can be identified by CAN bus check procedure.
(c) CAN bus short (CAN-H and CAN-L are shorted)
NOTE:
·No waveform is displayed.
·In case of ECM internal error, the waveform will change by removing a ECM. If the waveform does not change, the wiring harness may be defective.
·In case of ECM internal error, the waveform will change by removing a ECM. If the waveform does not change, the wiring harness may be defective.
(2) Example: CAN bus waveform (Group 2)
CAUTION:
The actual waveform greatly depends on the location of open or short circuit, and the waveforms is only an examples.
(a) Open circuit on either CAN bus sub-line (CAN-H)
NOTE:
·If an ECM is connected to CAN bus sub-line with an open circuit in either CAN-H or CAN-L, abnormal waveform is output. This defect interferes the signals from other parts, which deforms the waveform of other parts.
·Identify the defective part by performing CAN bus check, based on DTC, or removing each ECM or sensor to observe the waveform change. If ECM or sensor with open circuit in either CAN-H or CAN-L is removed, the waveform will be identical to the one when there is an open circuit in both CAN-H and CAN-L on CAN bus sub-line.
·Identify the defective part by performing CAN bus check, based on DTC, or removing each ECM or sensor to observe the waveform change. If ECM or sensor with open circuit in either CAN-H or CAN-L is removed, the waveform will be identical to the one when there is an open circuit in both CAN-H and CAN-L on CAN bus sub-line.
(b) Open circuit on either CAN bus sub-line (CAN-L)
NOTE:
·If an ECM is connected to CAN bus sub-line with an open circuit in either CAN-H or CAN-L, abnormal waveform is output. This defect interferes the signals from other parts, which deforms the waveform of other parts.
·Identify the defective part by performing CAN bus check, based on DTC, or removing each ECM or sensor to observe the waveform change. If ECM or sensor with open circuit in either CAN-H or CAN-L is removed, the waveform will be identical to the one when there is an open circuit in both CAN-H and CAN-L on CAN bus sub-line.
·Identify the defective part by performing CAN bus check, based on DTC, or removing each ECM or sensor to observe the waveform change. If ECM or sensor with open circuit in either CAN-H or CAN-L is removed, the waveform will be identical to the one when there is an open circuit in both CAN-H and CAN-L on CAN bus sub-line.
(c) Open circuit in CAN-H on CAN bus main line
NOTE:
·If an ECM or sensor is close to the data link connector in relation to the open circuit, it shows a nearly normal waveform.
·If an ECM or sensor is on the other side of the data link connector, it shows an abnormal waveform.
·An open circuit in CAN bus main line can be identified by measuring the resistance between CAN-H and CAN-L terminals on CAN bus sub-line (wiring harness).
·If an ECM or sensor is on the other side of the data link connector, it shows an abnormal waveform.
·An open circuit in CAN bus main line can be identified by measuring the resistance between CAN-H and CAN-L terminals on CAN bus sub-line (wiring harness).
(d) CAN-H shorted to GND (CAN bus line)
NOTE:
In case of ECM internal error, remove an ECM one by one to check whether the waveform changes or not. If it does not change, the wiring harness may be defective.
(e) CAN-L shorted to GND (CAN bus line)
NOTE:
In case of ECM internal error, remove an ECM one by one to check whether the waveform changes or not. If it does not change, the wiring harness may be defective.
CIRCUIT FIGURE
1. Vbus
NOTE:
The main body ECM (Multiplex network body computer) and the collation ECM (Smart key computer ASSY) are also connected to LIN communication line. (Refer to )
)ECM TERMINAL ARRANGEMENT
CAUTION:
·After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work. (See page )
·Turn the ignition switch off before measuring the resistances between CAN main bus lines and between CAN branch lines.
·Turn the ignition switch off before inspecting CAN bus lines for a ground short.
·Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.
·This section describes the standard values for all CAN related components.
)·Turn the ignition switch off before measuring the resistances between CAN main bus lines and between CAN branch lines.
·Turn the ignition switch off before inspecting CAN bus lines for a ground short.
·Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.
·This section describes the standard values for all CAN related components.
NOTE:
·Operating the ignition switch, any other switches or a door triggers the related ECU and sensor communication on the CAN. This communication will cause the resistance to change.
·Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
·Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
1. CAN NO. 1 JUNCTION CONNECTOR (for RHD)
(1) Check the CAN No. 1 junction connector.
NOTE:
The following tables contain information about the items and buses connected via junction connectors.
The junction connector may be used for multiple separate buses. In this case, the name of the bus will be shown below the name of the item that terminals are connected to. The bus name will be shown in brackets (example: (for V bus)).
(a) Connection diagram
Text in Illustration
| *a |
Front view of wire harness connector (to CAN No. 1 Junction Connector) |
*b |
to TCM* (for V bus) |
| *c |
to CAN No. 2 Junction Connector (for V bus) |
*d |
To the engine control computer (for V bus) |
| *e |
to Power Steering ECU Assembly (for V bus) |
- |
- |
(b) Check the connection diagram of the components which are connected to the CAN No. 1 junction connector.
| Terminal No. |
Connected to |
|---|---|
| A17-5 |
TCM* (for V bus) |
| A17-16 |
|
| A17-6 |
CAN No. 2 Junction Connector (for V bus) |
| A17-17 |
|
| A17-7 |
Engine control computer (for V bus) |
| A17-18 |
|
| A17-8 |
Power Steering ECU Assembly (for V bus) |
| A17-19 |
* : for Automatic Transmission System
2. CAN NO. 1 JUNCTION CONNECTOR (for LHD)
(1) Check the CAN No. 1 junction connector.
(a) Connection diagram
Text in Illustration
| *a |
Front view of wire harness connector (to CAN No. 1 Junction Connector) |
*b |
to TCM* (for V bus) |
| *c |
to Skid Control ECU (Brake Actuator Assembly) (for V bus) |
*d |
to CAN No. 2 Junction Connector (for V bus) |
| *e |
to Power Steering ECU Assembly (for V bus) |
- |
- |
(b) Check the connection diagram of the components which are connected to the CAN No. 1 junction connector.
| Terminal No. |
Connected to |
|---|---|
| A17-5 |
TCM* (for V bus) |
| A17-16 |
|
| A17-6 |
Skid Control ECU (Brake Actuator Assembly) (for V bus) |
| A17-17 |
|
| A17-7 |
CAN No. 2 Junction Connector (for V bus) |
| A17-18 |
|
| A17-8 |
Power Steering ECU Assembly (for V bus) |
| A17-19 |
* : for Automatic Transmission System
3. CAN NO. 2 JUNCTION CONNECTOR (for RHD)
(1) Check the CAN No. 2 junction connector.
(a) Connection diagram
Text in Illustration
| *a |
Front view of wire harness connector (to CAN No. 2 Junction Connector) |
*b |
to Skid Control ECU (Brake Actuator Assembly) (for V bus) |
| *c |
to Combination Meter Assembly (for V bus) |
*d |
to Main Body ECU (Network Gateway ECU) (for V bus) |
| *e |
to Certification ECU (Smart Key ECU Assembly)*1 (for V bus) |
*f |
to DLC3 (for V bus) |
| *g |
to Steering Angle Sensor (Spiral Cable Sub-assembly) (for V bus) |
*h |
Option Connector (for V bus) |
| *i |
to Air Bag ECU Assembly (for V bus) |
*j |
to CAN No. 1 Junction Connector (for V bus) |
| *k |
to Air Conditioning Control Assembly*2 (for V bus) |
- |
- |
(b) Check the connection diagram of the components which are connected to the CAN No. 2 junction connector.
| Terminal No. |
Connected to |
|---|---|
| D43-1 |
Skid Control ECU (Brake Actuator Assembly) (for V bus) |
| D43-12 |
|
| D43-2 |
Combination Meter Assembly (for V bus) |
| D43-13 |
|
| D43-3 |
Main Body ECU (Network Gateway ECU) (for V bus) |
| D43-14 |
|
| D43-4 |
Certification ECU (Smart Key ECU Assembly)*1 (for V bus) |
| D43-15 |
|
| D43-5 |
DLC3 (for V bus) |
| D43-16 |
|
| D43-6 |
Steering Angle Sensor (Spiral Cable Sub-assembly) (for V bus) |
| D43-17 |
|
| D43-7 |
Option Connector (for V bus) |
| D43-18 |
|
| D43-8 |
Air Bag ECU Assembly (for V bus) |
| D43-19 |
|
| D43-9 |
CAN No. 1 Junction Connector (for V bus) |
| D43-20 |
|
| D43-10 |
Air Conditioning Control Assembly*2 (for V bus) |
| D43-21 |
*1 : w/ Entry and Start System
*2 : for Automatic Air Conditioning System
*2 : for Automatic Air Conditioning System
4. CAN NO. 2 JUNCTION CONNECTOR (for LHD)
(1) Check the CAN No. 2 junction connector.
(a) Connection diagram
Text in Illustration
| *a |
Front view of wire harness connector (to CAN No. 2 Junction Connector) |
*b |
to CAN No. 1 Junction Connector (for V bus) |
| *c |
to Combination Meter Assembly (for V bus) |
*d |
to Main Body ECU (Network Gateway ECU) (for V bus) |
| *e |
to Certification ECU (Smart Key ECU Assembly)*1 (for V bus) |
*f |
to DLC3 (for V bus) |
| *g |
to Steering Angle Sensor (Spiral Cable Sub-assembly) (for V bus) |
*h |
to Option Connector (for V bus) |
| *i |
to Air Bag ECU Assembly (for V bus) |
*j |
To the engine control computer (for V bus) |
| *k |
to Air Conditioning Control Assembly*2 (for V bus) |
- |
- |
(b) Check the connection diagram of the components which are connected to the CAN No. 2 junction connector.
| Terminal No. |
Connected to |
|---|---|
| D43-1 |
CAN No. 1 Junction Connector (for V bus) |
| D43-12 |
|
| D43-2 |
Combination Meter Assembly (for V bus) |
| D43-13 |
|
| D43-3 |
Main Body ECU (Network Gateway ECU) (for V bus) |
| D43-14 |
|
| D43-4 |
Certification ECU (Smart Key ECU Assembly)*1 (for V bus) |
| D43-15 |
|
| D43-5 |
DLC3 (for V bus) |
| D43-16 |
|
| D43-6 |
Steering Angle Sensor (Spiral Cable Sub-assembly) (for V bus) |
| D43-17 |
|
| D43-7 |
Option Connector (for V bus) |
| D43-18 |
|
| D43-8 |
Air Bag ECU Assembly (for V bus) |
| D43-19 |
|
| D43-9 |
Engine control computer (for V bus) |
| D43-20 |
|
| D43-10 |
Air Conditioning Control Assembly*2 (for V bus) |
| D43-21 |
*1 : w/ Entry and Start System
*2 : for Automatic Air Conditioning System
*2 : for Automatic Air Conditioning System
5. DLC3
Standard Resistance
| Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
| D10-6 (CANH) - D10-14 (CANL) |
HIGH-level CAN bus line - LOW-level CAN bus line |
Cable disconnected from negative (-) battery terminal |
57 to 63Ω |
| D10-6 (CANH) - D10-4 (CG) |
HIGH-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| D10-14 (CANL) - D10-4 (CG) |
LOW-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| D10-6 (CANH) - D10-16 (BAT) |
HIGH-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
| D10-14 (CANL) - D10-16 (BAT) |
LOW-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
6. Engine control computer
Text in Illustration
| *a |
Component without harness connected (Engine control computer) |
- |
- |
(1) Disconnect the A33 and A36 engine control computer connectors.
Text in Illustration
| *a |
Front view of wire harness connector (to engine control computer) |
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance
| Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
| A33-19 (CANH) - A33-18 (CANL) |
HIGH-level CAN bus line - LOW-level CAN bus line |
Cable disconnected from negative (-) battery terminal |
114 to 126Ω |
| A33-19 (CANH) - A36-4 (E01) |
HIGH-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| A33-18 (CANL) - A36-4 (E01) |
LOW-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| A33-19 (CANH) - A33-2 (BATT) |
HIGH-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
| A33-18 (CANL) - A33-2 (BATT) |
LOW-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
7. TCM (for Automatic Transmission System)
Text in Illustration
| *a |
Component without harness connected (Engine control computer) |
- |
- |
(1) Disconnect the A18 TCM connector.
Text in Illustration
| *a |
Front view of wire harness connector (to engine control computer) |
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance
| Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
| A18-29 (CANH) - A18-28 (CANL) |
HIGH-level CAN bus line - LOW-level CAN bus line |
Cable disconnected from negative (-) battery terminal |
57 to 63Ω |
| A18-29 (CANH) - A18-3 (E02) |
HIGH-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| A18-28 (CANL) - A18-3 (E02) |
LOW-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| A18-29 (CANH) - A18-26 (BM) |
HIGH-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
| A18-28 (CANL) - A18-26 (BM) |
LOW-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
8. POWER STEERING ECU ASSEMBLY
Text in Illustration
| *a |
Component without harness connected (Power Steering ECU Assembly) |
- |
- |
(1) Disconnect the A14 and A15 power steering ECU assembly connectors.
Text in Illustration
| *a |
Front view of wire harness connector (to Power Steering ECU Assembly) |
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance
| Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
| A15-1 (CANH) - A15-7 (CANL) |
HIGH-level CAN bus line - LOW-level CAN bus line |
Cable disconnected from negative (-) battery terminal |
57 to 63Ω |
| A15-1 (CANH) - A14-2 (PGND) |
HIGH-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| A15-7 (CANL) - A14-2 (PGND) |
LOW-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| A15-1 (CANH) - A14-1 (PIG) |
HIGH-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
| A15-7 (CANL) - A14-1 (PIG) |
LOW-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
9. COMBINATION METER ASSEMBLY
Text in Illustration
| *a |
Component without harness connected (Combination Meter Assembly) |
- |
- |
(1) Disconnect the D7 combination meter assembly connector.
Text in Illustration
| *a |
Front view of wire harness connector (to Combination Meter Assembly) |
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance
| Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
| D7-6 (CANH) - D7-7 (CANL) |
HIGH-level CAN bus line - LOW-level CAN bus line |
Cable disconnected from negative (-) battery terminal |
57 to 63Ω |
| D7-6 (CANH) - D7-20 (ES1) |
HIGH-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| D7-7 (CANL) - D7-20 (ES1) |
LOW-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| D7-6 (CANH) - D7-1 (B) |
HIGH-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
| D7-7 (CANL) - D7-1 (B) |
LOW-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
10. INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (NETWORK GATEWAY ECU)
Text in Illustration
| *a |
Component without harness connected (Instrument Panel Junction Block Assembly) |
*b |
Component without harness connected (Main Body ECU (Network Gateway ECU)) |
(1) Disconnect the D5 main body ECU (network gateway ECU) connector.
Text in Illustration
| *1 |
DLC3 |
| *a |
Front view of wire harness connector (to Main Body ECU (Network Gateway ECU)) |
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance
| Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
| D5-14 (CANH) - D5-13 (CANL) |
HIGH-level CAN bus line - LOW-level CAN bus line |
Cable disconnected from negative (-) battery terminal |
57 to 63Ω |
| D5-14 (CANH) - D10-4 (CG) |
HIGH-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| D5-13 (CANL) - D10-4 (CG) |
LOW-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| D5-14 (CANH) - D10-16 (BAT) |
HIGH-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
| D5-13 (CANL) - D10-16 (BAT) |
LOW-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
11. CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Entry and Start System)
Text in Illustration
| *a |
Component without harness connected (Certification ECU (Smart Key ECU Assembly)) |
- |
- |
(1) Disconnect the D41 and D48 certification ECU (smart key ECU assembly) connectors.
Text in Illustration
| *a |
Front view of wire harness connector (to Certification ECU (Smart Key ECU Assembly)) |
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance
| Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
| D41-14 (CANH) - D41-15 (CANL) |
HIGH-level CAN bus line - LOW-level CAN bus line |
Cable disconnected from negative (-) battery terminal |
57 to 63Ω |
| D41-14 (CANH) - D48-11 (GND) |
HIGH-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| D41-15 (CANL) - D48-11 (GND) |
LOW-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| D41-14 (CANH) - D48-2 (+B) |
HIGH-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
| D41-15 (CANL) - D48-2 (+B) |
LOW-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
12. STEERING ANGLE SENSOR (SPIRAL CABLE SUB-ASSEMBLY)
Text in Illustration
| *a |
Component without harness connected (Steering Angle Sensor (Spiral Cable Sub-assembly)) |
- |
- |
(1) Disconnect the D56 steering angle sensor (spiral cable sub-assembly) connector.
Text in Illustration
| *1 |
DLC3 |
| *a |
Front view of wire harness connector (to Steering Angle Sensor (Spiral Cable Sub-assembly)) |
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance
| Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
| D56-3 (CANH) - D56-2 (CANL) |
HIGH-level CAN bus line - LOW-level CAN bus line |
Cable disconnected from negative (-) battery terminal |
57 to 63Ω |
| D56-3 (CANH) - D10-4 (CG) |
HIGH-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| D56-2 (CANL) - D10-4 (CG) |
LOW-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| D56-3 (CANH) - D10-16 (BAT) |
HIGH-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
| D56-2 (CANL) - D10-16 (BAT) |
LOW-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
13. Option Connector
Text in Illustration
| *1 |
DLC3 |
| *a |
Front view of wire harness connector (to Option Connector) |
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance
| Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
| D29-4 (CANH) - D29-5 (CANL) |
HIGH-level CAN bus line - LOW-level CAN bus line |
Cable disconnected from negative (-) battery terminal |
57 to 63Ω |
| D29-4 (CANH) - D10-4 (CG) |
HIGH-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| D29-5 (CANL) - D10-4 (CG) |
LOW-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| D29-4 (CANH) - D10-16 (BAT) |
HIGH-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
| D29-5 (CANL) - D10-16 (BAT) |
LOW-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
14. AIR BAG ECU ASSEMBLY
Text in Illustration
| *a |
Component without harness connected (Air Bag ECU Assembly) |
- |
- |
(1) Disconnect the D27 air bag ECU assembly connector.
Text in Illustration
| *1 |
DLC3 |
| *a |
Front view of wire harness connector (to Air Bag ECU Assembly) |
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance
| Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
| D27-13 (CANH) - D27-22 (CANL) |
HIGH-level CAN bus line - LOW-level CAN bus line |
Cable disconnected from negative (-) battery terminal |
57 to 63Ω |
| D27-13 (CANH) - D10-4 (CG) |
HIGH-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| D27-22 (CANL) - D10-4 (CG) |
LOW-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| D27-13 (CANH) - D10-16 (BAT) |
HIGH-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
| D27-22 (CANL) - D10-16 (BAT) |
LOW-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
15. AIR CONDITIONING CONTROL ASSEMBLY (for Automatic Air Conditioning System)
Text in Illustration
| *a |
Component without harness connected (Air Conditioning Control Assembly) |
- |
- |
(1) Disconnect the D19 air conditioning control assembly connector.
Text in Illustration
| *a |
Front view of wire harness connector (to Air Conditioning Control Assembly) |
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance
| Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
| D19-3 (CANH) - D19-12 (CANL) |
HIGH-level CAN bus line - LOW-level CAN bus line |
Cable disconnected from negative (-) battery terminal |
57 to 63Ω |
| D19-13 (CANH) - D19-16 (GND) |
HIGH-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| D19-12 (CANL) - D19-16 (GND) |
LOW-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| D19-13 (CANH) - D19-9 (+B) |
HIGH-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
| D19-12 (CANL) - D19-9 (+B) |
LOW-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
16. SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)
Text in Illustration
| *a |
Component without harness connected (Skid Control ECU (Brake Actuator Assembly)) |
- |
- |
(1) Disconnect the A5 skid control ECU (brake actuator assembly) connector.
Text in Illustration
| *a |
Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly)) |
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance
| Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
| A5-26 (CANH) - A5-14 (CANL) |
HIGH-level CAN bus line - LOW-level CAN bus line |
Cable disconnected from negative (-) battery terminal |
114 to 126Ω |
| A5-26 (CANH) - A5-13 (GND2) |
HIGH-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| A5-14 (CANL) - A5-13 (GND2) |
LOW-level CAN bus line - Ground |
Cable disconnected from negative (-) battery terminal |
200Ω or higher |
| A5-26 (CANH) - A5-1 (+BM) |
HIGH-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
| A5-14 (CANL) - A5-1 (+BM) |
LOW-level CAN bus line - Battery positive (+) |
Cable disconnected from negative (-) battery terminal |
6kΩ or higher |
FAILSAFE LIST
1. Failsafe function
(1) If a failure occurs on any of the bus (communication line) due to short circuit and other reasons, the fail safe function switches the process on the defective bus to a predefined bus to protect against malfunction.
(2) Behavior of each system in case of lost communication (For details, refer to the description of each system)
| Function |
Control master (Main ECM that controls the process) |
Relevant ECMs |
Behavior in case of lost communication |
Notification to driver |
Notification method |
Diagnostic codes ([ECM which saves DTC] ) |
|---|---|---|---|---|---|---|
| Speed display (Display the data on speedmeter based on vehicle speed signal sent by the brake actuator ASSY) |
Combination meter ASSY |
Brake actuator ASSY |
Assume the input signal indicates 0 km/h |
Yes |
·Display 0 km/h on the speed meter ·Stop the driving monitor calculation |
U0122 [Combination meter ASSY] |
| Odo/trip meter (Receive vehicle speed signal and display the travel distance) |
Combination meter ASSY |
Brake actuator ASSY |
Stop calculation and continue to display the last data until IG-OFF |
No |
- |
U0122 [Combination meter ASSY] |
| Tachometer (Receive the engine speed signal and display the data on tachometer) |
Combination meter ASSY |
Engine control computer |
Assume the input signal indicates 0 r/min |
Yes |
Display 0 r/min on the tachometer |
U0100 [Combination meter ASSY] |
| Airbag (Turn ON/OFF the airbag warning light) |
Combination meter ASSY |
Airbag sensor ASSY |
Assume the input signal indicates “Active” |
Yes |
Turn ON the airbag warning light |
U0151 [Combination meter ASSY] |
| EPS warning (Turn ON/OFF the EPS warning light) |
Combination meter ASSY |
Power steering computer ASSY |
Assume the input signal indicates “Active” |
Yes |
Turn ON the EPS warning light |
U0131 [Combination meter ASSY] |
| SLIP warning (Turn ON/OFF the SLIP warning light) |
Combination meter ASSY |
Brake actuator ASSY |
Assume the input signal indicates “Active” |
Yes |
Turn ON the SLIP warning light |
U0122 [Combination meter ASSY] |
| Smart function (Smart lock/smart unlock/smart trunk open) |
Collation ECM (Smart key computer ASSY) |
·Main body ECM (Multiplex network body computer) ·Combination meter ASSY |
Activate the smart unlock-retry |
Yes |
·Disable the smart lock/smart unlock/smart trunk open ·Disable the smart alert (lockout, key theft, key reminder) and disable the key lockout prevention control ·Disable the smart illumination |
U0140, U0155, U0422 [Collation ECM (Smart key computer ASSY)] |
| Engine ignition SW light control (Turn ON/OFF the engine ignition switch light) |
Collation ECM (Smart key computer ASSY) |
Main body ECM (Multiplex network body computer) |
·If the engine ignition SW light is ON (with dome light): turn OFF ·If DC cut fuse is pulled and the engine ignition SW light is ON (panel light): turn OFF |
Yes |
·If the engine ignition SW light is ON (with dome light): turn OFF ·If DC cut fuse is pulled and the engine ignition SW light is ON (panel light): turn OFF |
U0140, U0422 [Collation ECM (Smart key computer ASSY)] |
| Push button start (Power supply switching) |
Collation ECM (Smart key computer ASSY) |
·Main body ECM (Multiplex network body computer) ·Combination meter ASSY ·Engine control computer |
- |
Yes |
Do not display the start operation |
U0100, U0140, U0155, U0422 [Collation ECM (Smart key computer ASSY)] |
| Electric load control (Idle-up is enabled due to electric load, etc.) |
Engine control computer |
·Main body ECM (Multiplex network body computer) ·Air conditioner amplifier ASSY |
Disable idle-up due to electric load, etc. |
Yes |
Idle speed changes |
- |
| Air conditioner cooperation (Enable idle-up/air conditioner cut control via compressor load) |
Engine control computer |
Air conditioner amplifier ASSY |
Disable the air conditioner cooperation (no idle-up) |
Yes |
Stop the air conditioner |
- |
| Integrated control (VSC) (By estimating the required driving force (torque) based on the acceleration, control the driving force (torque) characteristics as required to realize stability under constant velocity driving, improve starting, reacceleration, and acceleration) |
Engine control computer |
·Collation ECM (Smart key computer ASSY) ·Brake actuator ASSY ·Spiral cable SUB-ASSY ·Brake actuator ASSY |
Disable the functions to estimate the required driving force (torque) based on the acceleration and control the driving force (torque) characteristics as required to realize stability under constant velocity driving, improve starting, reacceleration, and acceleration |
Yes |
Disable the functions to estimate the required driving force (torque) based on the acceleration and control the driving force (torque) characteristics as required to realize stability under constant velocity driving, improve starting, reacceleration, and acceleration |
- |
| ECT system indicator display (Display shift, S/W, mode on the meter) |
Transmission control computer ASSY |
Combination meter ASSY |
Disable the indicators |
Yes |
Indicators are OFF |
- |
| AI-SHIFT control (Automatic transmission control to improve engine braking force and acceleration) |
Transmission control computer ASSY |
Brake actuator ASSY |
AI-SHIFT control is disabled |
No |
- |
- |
| N control (Reduce the engine load and activate idle-up) |
Transmission control computer ASSY |
Brake actuator ASSY |
Disable N control |
No |
- |
- |
| Coast down shift (Switch the coast down speed change point according to air conditioner load) |
Transmission control computer ASSY |
Air conditioner amplifier ASSY |
Coast down shock becomes more apparent |
No |
- |
- |
| Shift-up delay due to heating request (Activate the shift-up delay due to heating request) |
Transmission control computer ASSY |
Air conditioner amplifier ASSY |
Shift-up delay due to heating request is disabled |
No |
- |
- |
| ABS/VSC/TRC control (Anti-wheel-lock in sudden braking) (Improve stability of the vehicle to protect against skidding while turning and wheel slip when starting the vehicle) |
Brake actuator ASSY |
·Engine control computer ·Spiral cable SUB-ASSY ·Airbag sensor ASSY |
ABS/VSC/TRC control is disabled |
Yes |
·Brake warning light is ON ·ABS warning light is ON ·Slip indicator light is ON |
U0100 U0126 [Brake actuator ASSY] |
| EPS control (Adaptive torque control in response to vehicle speed) |
Power steering computer ASSY |
Engine control computer |
Assist stops or degraded (steering wheel becomes heavy) |
Yes |
- |
U0100 [Power steering computer ASSY] |
| Brake actuator ASSY |
ESP indicator is ON |
U0122 U0416 [Power steering computer ASSY] |
||||
| Air conditioner control (Water temperature correction control) |
Air conditioner amplifier ASSY |
Engine control computer |
·Temperature information (IG ON): use the default value (80°C) ·Engine type (IG ON): use the default value (depends on the model) ·IG-OFF: none |
No |
- |
U0100 U0401 [Air conditioner amplifier ASSY] |
| Simple load control (Restrict the simple electric load control depending on load control level) |
Air conditioner amplifier ASSY |
Power steering computer ASSY |
·The last data is retained while IG-ON (if reset, the load control is disabled) ·IG-OFF: none |
No |
- |
U0100 U0401 [Air conditioner amplifier ASSY] |
| Panel dimmer control (A/C control pattern switch, HCAV control switch, indicator dimmer control) |
Air conditioner amplifier ASSY |
Main body ECM (Multiplex network body computer) |
·The last data is retained while IG-ON (if reset, the load control is disabled) ·IG-OFF: none |
Yes |
Rear defroster switch is disabled |
U0140 U0422 [Air conditioner amplifier ASSY] |
| Destination identification control (Identify the destination) |
Air conditioner amplifier ASSY |
Main body ECM (Multiplex network body computer) |
·The last data is retained while IG-ON ·IG-OFF: none |
Yes |
Rear defroster switch is disabled |
U0140 U0422 [Air conditioner amplifier ASSY] |
| Ambient temperature correction control (Switch the operation status of air conditioner and correct the ambient temperature display value based on the vehicle signal) |
Air conditioner amplifier ASSY |
Combination meter ASSY |
·SPD (IG ON): control using the default value (0 km) ·IG-OFF: none |
No |
·The consistency between the ambient temperature and the display value is reduced ·The level of A/C air flow volume correction goes down |
U0155 U0423 [Air conditioner amplifier ASSY] |
| Event data recorder (EDR) (If EDR record criteria is met, the status data regarding the vehicle speed, accelerator pedal opening angle, and shift position is logged) |
Airbag sensor ASSY |
·Brake actuator ASSY ·Engine control computer |
“Invalid data” is logged in the event data recorder (EDR) |
No |
- |
- |
| Sub-lines 57-63 Ω (Transmission control computer ASSY system) |
|---|
Description of functions
| Diagnostic items |
Symptoms |
Possible cause |
|---|---|---|
| Sub-lines 57-63 Ω (DTC detected on the transmission control computer ASSY system) |
Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. |
·Transmission control computer ASSY, open circuit in sub-line or connector defect ·Transmission control computer ASSY, power supply system defect ·Transmission control computer ASSY, internal error |
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 60 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·Before performing troubleshooting, check the fuse for this circuit.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 60 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)·Before performing troubleshooting, check the fuse for this circuit.
NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for open circuit in CAN bus sub-line (Sub-line to the transmission control computer ASSY)
(1) Disconnect the battery ground terminal, and then disconnect the vehicle harness connector A18 from the transmission control computer ASSY.
(2) Measure the resistance between the terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| A18-29 - A18-28 |
Disconnection of the battery ground terminal |
57 to 63 Ω |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Transmission control computer ASSY) |
NG
>Repair or replacement of CAN bus sub-line or connector
OK▼
2.
Checking of the wiring harness and connector (Power supply system)
(1) Measure the resistance between the terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| A18-3 - chassis ground |
Disconnection of the battery ground terminal |
Less than 1 Ω |
| A18-33 - chassis ground |
Disconnection of the battery ground terminal |
Less than 1 Ω |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Transmission control computer ASSY) |
(2) Reconnect the battery ground terminal.
(3) Measure the voltage between the terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| A18-26 - chassis ground |
IG OFF |
11 to 14 V |
| A18-34 - chassis ground |
IG ON |
11 to 14 V |
| A18-35 - chassis ground |
IG ON |
11 to 14 V |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Transmission control computer ASSY) |
NG
>Repair or replacement of wiring harness or connector
OK▼
Replacement of the transmission control computer ASSY (Refer to )
)| Sub-lines 57-63 Ω (Brake actuator system) |
|---|
Description of functions
| Diagnostic items |
Symptoms |
Possible cause |
|---|---|---|
| Sub-lines 57-63 Ω (DTC detected on VDC system) |
Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. |
·Brake actuator ASSY, open circuit in sub-line or connector defect ·Brake actuator ASSY, power supply system defect ·Brake actuator ASSY, internal error |
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·Before performing troubleshooting, check the fuse for this circuit.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)·Before performing troubleshooting, check the fuse for this circuit.
NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for open circuit in CAN bus main line (Main line to the brake actuator ASSY)
(1) Disconnect the battery ground terminal, and then disconnect the vehicle harness connector A5 from the brake actuator ASSY.
(2) Measure the resistance between the terminals.
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Brake actuator ASSY) |
NG
>Repair or replacement of CAN bus main line
OK▼
2.
Checking of the wiring harness and connector (Power supply system)
(1) Measure the resistance between the terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| A5-13 - chassis ground |
Disconnection of the battery ground terminal |
Less than 1 Ω |
| A5-38 - chassis ground |
Disconnection of the battery ground terminal |
Less than 1 Ω |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Brake actuator ASSY) |
(2) Reconnect the battery ground terminal.
(3) Measure the voltage between the terminals.
Voltage
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| A5-1 - chassis ground |
IG OFF |
11 to 14 V |
| A5-25 - chassis ground |
IG OFF |
11 to 14 V |
| A5-28 - chassis ground |
IG ON |
11 to 14 V |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Brake actuator ASSY) |
NG
>Repair or replacement of wiring harness or connector
OK▼
Replacement of the brake actuator ASSY (Refer to )
)| Sub-lines 57-63 Ω (Spiral cable SUB-ASSY system) |
|---|
Description of functions
| Diagnostic items |
Symptoms |
Possible cause |
|---|---|---|
| Sub-lines 57-63 Ω (DTC detected on the spiral cable SUB-ASSY system) |
Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. |
·Spiral cable SUB-ASSY (with sensor), open circuit in sub-line or connector defect ·Spiral cable SUB-ASSY (with sensor), power supply system defect ·Spiral cable SUB-ASSY (with sensor), internal error |
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 2 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·Before performing troubleshooting, check the fuse for this circuit.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 2 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)·Before performing troubleshooting, check the fuse for this circuit.
NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for an open circuit in CAN bus sub-line (Sub-line to the spiral cable SUB-ASSY (with sensor))
(1) Disconnect the battery ground terminal, and then disconnect the vehicle harness connector D56 from the spiral cable SUB-ASSY (with sensor).
(2) Measure the resistance between the terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| D56-3 - D56-2 |
Disconnection of the battery ground terminal |
57 to 63 Ω |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Spiral cable SUB-ASSY (with sensor)) |
NG
>Repair or replacement of CAN bus sub-line or connector
OK▼
2.
Checking of the wiring harness and connector (Power supply system)
(1) Measure the resistance between the terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| D56-1 - chassis ground |
Disconnection of the battery ground terminal |
Less than 1 Ω |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Spiral cable SUB-ASSY (with sensor)) |
(2) Reconnect the battery ground terminal.
NG
>Repair or replacement of wiring harness or connector
OK▼
Replacement of the spiral cable SUB-ASSY (with sensor) (Refer to )
)| Sub-lines 57-63 Ω (Engine control computer system) |
|---|
Description of functions
| Diagnostic items |
Symptoms |
Possible cause |
|---|---|---|
| Sub-lines 57-63 Ω (DTC detected on ECM system) |
Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. |
·Engine control computer, open circuit in the main line or connector defect ·Engine control computer, power supply system defect ·Engine control computer, internal error |
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 2 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·Before performing troubleshooting, check the fuse for this circuit.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 2 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)·Before performing troubleshooting, check the fuse for this circuit.
NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for open circuit in CAN bus main line (Main line to the engine control computer)
(1) Disconnect the battery ground terminal, and then disconnect the vehicle harness connector A33 from the engine control computer.
NG
>Repair or replacement of CAN bus main line or connector
OK▼
2.
Checking of the wiring harness and connector (Power supply system)
(1) Check the power supply system of the engine control computer. (Refer to )
)
NOTE:
If no defect is found in the power supply system of the engine control computer, replace the engine control computer.
NG
>Repair or replacement of wiring harness or connector
OK▼
Replacement of the engine control computer (Refer to )
)| Sub-lines 57-63 Ω (Airbag system) |
|---|
Description of functions
| Diagnostic items |
Symptoms |
Possible cause |
|---|---|---|
| Sub-lines 57-63 Ω (DTC detected on the airbag system) |
Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. |
·Airbag sensor ASSY, open circuit in the sub-line or connector defect ·Airbag sensor ASSY, power supply system defect ·Airbag sensor ASSY, internal error |
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 60 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·Before performing troubleshooting, check the fuse for this circuit.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 60 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)·Before performing troubleshooting, check the fuse for this circuit.
NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for open circuit in CAN bus sub-line (Sub-line to the airbag sensor ASSY)
(1) Disconnect the battery ground terminal, and then disconnect the vehicle harness connector D27 from the airbag sensor ASSY.
NG
>Repair or replacement of CAN bus sub-line or connector
OK▼
2.
Checking of the wiring harness and connector (Power supply system)
(1) Measure the resistance between the terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| D27-25 - chassis ground |
Disconnection of the battery ground terminal |
Less than 1 Ω |
| D27-26 - chassis ground |
Disconnection of the battery ground terminal |
Less than 1 Ω |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Airbag sensor ASSY) |
(2) Reconnect the battery ground terminal.
NG
>Repair or replacement of wiring harness or connector
OK▼
Replacement of the airbag sensor ASSY (Refer to )
)| Sub-lines 57-63 Ω (Electric power steering system) |
|---|
Description of functions
| Diagnostic items |
Symptoms |
Possible cause |
|---|---|---|
| Sub-lines 57-63 Ω (DTC detected on the electric power steering system) |
Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. |
·Power steering computer ASSY, open circuit in the sub-line or connector defect ·Power steering computer ASSY, power supply system defect ·Power steering computer ASSY, internal error |
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 2 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·Before performing troubleshooting, check the fuse for this circuit.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 2 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)·Before performing troubleshooting, check the fuse for this circuit.
NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for open circuit in CAN bus sub-line (Sub-line to the power steering computer ASSY)
(1) Disconnect the battery ground terminal, and then disconnect the vehicle harness connector A15 from the power steering computer ASSY.
NG
>Repair or replacement of CAN bus sub-line or connector
OK▼
2.
Checking of the wiring harness and connector (Power supply system)
(1) Disconnect the vehicle harness connector A14 from the power steering computer ASSY.
(2) Measure the resistance between the terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| A14-2 - chassis ground |
Disconnection of the battery ground terminal |
Less than 1 Ω |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Power steering computer ASSY) |
(3) Reconnect the battery ground terminal.
NG
>Repair or replacement of wiring harness or connector
OK▼
Replacement of the power steering computer ASSY (Refer to )
)| Sub-lines 57-63 Ω (Air conditioner control panel system) |
|---|
Description of functions
| Diagnostic items |
Symptoms |
Possible cause |
|---|---|---|
| Sub-lines 57-63 Ω (DTC detected on the air conditioner control panel system) |
Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. |
·Air conditioner amplifier ASSY, open circuit in the sub-line or connector defect ·Air conditioner amplifier ASSY, power supply system defect ·Air conditioner amplifier ASSY, internal error |
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 60 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·Before performing troubleshooting, check the fuse for this circuit.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 60 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)·Before performing troubleshooting, check the fuse for this circuit.
NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for open circuit in CAN bus sub-line (Sub-line to the air conditioner amplifier ASSY)
(1) Disconnect the battery ground terminal, and then disconnect the vehicle harness connector D19 from the air conditioner amplifier ASSY.
NG
>Repair or replacement of CAN bus sub-line or connector
OK▼
2.
Checking of the wiring harness and connector (Power supply system)
(1) Measure the resistance between the terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| D19-16 - chassis ground |
Disconnection of the battery ground terminal |
Less than 1 Ω |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Air conditioner amplifier ASSY) |
(2) Reconnect the battery ground terminal.
(3) Measure the voltage between the terminals.
Voltage
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| D19-9 - chassis ground |
IG OFF |
11 to 14 V |
| D19-10 - chassis ground |
IG ON |
11 to 14 V |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Air conditioner amplifier ASSY) |
NG
>Repair or replacement of wiring harness or connector
OK▼
Replacement of the air conditioner amplifier ASSY (Refer to)
)| Sub-lines 57-63 Ω (Combination meter ASSY system) |
|---|
Description of functions
| Diagnostic items |
Symptoms |
Possible cause |
|---|---|---|
| Sub-lines 57-63 Ω (DTC detected on the combination meter ASSY system) |
Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. |
·Combination meter ASSY, open circuit in the sub-line or connector defect ·Combination meter ASSY, power supply system defect ·Combination meter ASSY, internal error |
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 3 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·Before performing troubleshooting, check the fuse for this circuit.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 3 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)·Before performing troubleshooting, check the fuse for this circuit.
NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for open circuit in CAN bus sub-line (Sub-line to the combination meter ASSY)
(1) Disconnect the battery ground terminal, and then disconnect the vehicle harness connector D7 from the combination meter ASSY.
NG
>Repair or replacement of CAN bus sub-line or connector
OK▼
2.
Checking of the wiring harness and connector (Power supply system)
(1) Measure the resistance between the terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| D7-20 - chassis ground |
Disconnection of the battery ground terminal |
Less than 1 Ω |
| D7-40 - chassis ground |
Disconnection of the battery ground terminal |
Less than 1 Ω |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Combination meter ASSY) |
(2) Reconnect the battery ground terminal.
NG
>Repair or replacement of wiring harness or connector
OK▼
Replacement of the combination meter ASSY (Refer to )
)| Sub-lines 57-63 Ω (Keyless access system) |
|---|
Description of functions
| Diagnostic items |
Symptoms |
Possible cause |
|---|---|---|
| Sub-lines 57-63 Ω (DTC detected on the combination meter ASSY system) |
Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. |
·Collation ECM (Smart key computer ASSY), open circuit in sub-line or connector defect ·Collation ECM (smart key computer ASSY), power supply system defect ·Collation ECM (smart key computer ASSY), internal error |
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 10 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·Before performing troubleshooting, check the fuse for this circuit.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 10 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)·Before performing troubleshooting, check the fuse for this circuit.
NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for open circuit in CAN bus sub-line (Sub-line to the collation ECM (Smart key computer ASSY))
(1) Disconnect the battery ground terminal, and then disconnect the vehicle harness connector D41 from the collation ECM (Smart key computer ASSY).
(2) Measure the resistance between the terminals.
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Collation ECM (Smart key computer ASSY)) |
NG
>Repair or replacement of CAN bus sub-line
OK▼
2.
Checking of the wiring harness and connector (Power supply system)
(1) Measure the resistance between the terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| D48-11 - chassis ground |
Disconnection of the battery ground terminal |
Less than 1 Ω |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Collation ECM (Smart key computer ASSY)) |
(2) Reconnect the battery ground terminal.
(3) Measure the voltage between the terminals.
Voltage
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| D41-5 - chassis ground |
IG ON |
11 to 14 V |
| D48-2 - chassis ground |
IG OFF |
11 to 14 V |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Collation ECM (Smart key computer ASSY)) |
NG
>Repair or replacement of wiring harness or connector
OK▼
Replacement of the collation ECM (Smart key computer ASSY)
| Sub-lines 57-63 Ω (Body integrated unit system) |
|---|
Description of functions
| Diagnostic items |
Symptoms |
Inspection items |
|---|---|---|
| Sub-lines 57-63 Ω (DTC detected on the body integrated unit system) |
Perform inspection if missing data or data error is detected. The cause of malfunction is not a short to the power supply or ground. |
·Main body ECM (Multiplex network body computer), open circuit in sub-line or connector defect ·Main body ECM (multiplex network body computer), power supply system defect ·Main body ECM (multiplex network body computer), internal error |
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 15 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·Before performing troubleshooting, check the fuse for this circuit.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: wait 15 seconds or more after IG ON
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)·Before performing troubleshooting, check the fuse for this circuit.
NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for open circuit in CAN bus sub-line (Sub-line to the main body ECM (Multiplex network body computer))
(1) Disconnect the battery ground terminal, and then disconnect the connector D5 from the main body ECM (Multiplex network body computer).
NG
>Repair or replacement of CAN bus sub-line or connector
OK▼
2.
Checking of the instrument panel junction block ASSY
(1) Remove the main body ECM (Multiplex network body computer). (Refer to )
)(2) Remove the instrument panel junction block ASSY. (Refer to )
)
Captions in illustration
| *a |
Connector not connected (Instrument panel junction block ASSY) |
- |
- |
(3) Measure the resistance between the terminals.
NG
>Replacement of the instrument panel junction block ASSY (Refer to )
)OK▼
3.
Checking of the wiring harness and connector (Power supply system)
(1) Reinstall the instrument panel junction block ASSY.
(2) Disconnect the connector D6 from the main body ECM (Multiplex network body computer).
Captions in illustration
| *a |
Connector not connected (Instrument panel junction block ASSY) |
*b |
Front side of vehicle wiring harness connector (Main body ECM (Multiplex network body computer)) |
(3) Measure the resistance between the terminals.
(4) Reconnect the battery ground terminal.
(5) Measure the voltage between the terminals.
Captions in illustration
| *a |
Connector not connected (Instrument panel junction block ASSY) |
- |
- |
NG
>Repair or replacement of wiring harness or connector
OK▼
Replacement of the main body ECM (Multiplex network body computer) (Refer to )
)| 63 Ω or more (RHD model) |
|---|
Description of functions
If the resistance between the data link connector 6 (CANH) ←→ 14(CANL) is 63 Ω or more, CAN bus main line or the sub-line to the data link connector may be open.
| Symptoms |
Possible cause |
|---|---|
| Resistance between the data link connectors 6 (CANH) ←→ 14 (CANL) is 64 Ω or more |
·Open circuit in the sub-line or defective connector in the data link connector ·Open circuit in CAN bus main line or connector defect ·Wiring harness connector (CAN J/C1) ·Wiring harness connector (CAN J/C2) ·Engine control computer, internal error ·Brake actuator ASSY, internal error |
This malfunction is not caused by CAN bus sub-line or each ECM and sensor connected to CAN bus sub-line.
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for open circuit in CAN bus sub-line (sub-line to data link connector)
SST
09843-18040
(1) Disconnect the battery ground terminal.
(2) Use the SST (diagnosis check wire No. 2) to inspect the resistance between terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| D10-6 - D10-14 |
Disconnection of the battery ground terminal |
57 to 63Ω |
Captions in illustration
| *1 |
Data link connector |
CAUTION:
When the measured value is 63 Ω or more and CAN communication system DTC is output, there may be a defect besides the open circuit in the data link connector sub-line. Repair the defective part first, and then follow the procedure again described in ‘How to troubleshoot’. (Refer to )
)OK
>CAN bus is normal.
NG▼
2.
Checking for open circuit in CAN bus main line (Engine control computer)
(1) Disconnect the vehicle harness connector A33 from the engine control computer.
NG
> Go to Step 3
OK▼
Replacement of the engine control computer (Refer to )
)3.
Checking for an open circuit in CAN bus main line (Brake actuator ASSY)
(1) Reconnect the vehicle harness connector A33 to the engine control computer.
(2) Disconnect the vehicle harness connector A5 from the brake actuator ASSY.
NG
> Go to Step 4
OK▼
Replacement of the brake actuator ASSY (Refer to )
)4.
Checking for open circuit in CAN bus main line (Wiring harness connector (CAN J/C1))
(1) Reconnect the vehicle harness connector A5 to the brake actuator ASSY.
(2) Disconnect the vehicle wiring harness connector A17 from the wiring harness connector (CAN J/C1).
(3) Measure the resistance between the terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
Connecting to |
|---|---|---|---|
| A17-6 - A17-17 |
Disconnection of the battery ground terminal |
114 to 126 Ω |
Wiring harness connector (CAN J/C2) |
| A17-7 - A17-18 |
Disconnection of the battery ground terminal |
114 to 126 Ω |
Engine control computer |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Wiring harness connector (CAN J/C1)) |
| *b |
To the wiring harness connector (CAN J/C2) |
| *c |
To the engine control computer |
B
>Repair or replacement of CAN bus main line or connector (Wiring harness connector (CAN J/C1) - Engine control computer)
C
> Go to Step 5
A▼
Replacement of the wiring harness connector (CAN J/C1)
5.
Checking for open circuit in CAN bus main line (Wiring harness connector (CAN J/C2))
(1) Connect the vehicle wiring harness connector A17 to the wiring harness connector (CAN J/C1).
(2) Disconnect the vehicle wiring harness connector D43 from the wiring harness connector (CAN J/C2).
(3) Measure the resistance between the terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
Connecting to |
|---|---|---|---|
| D43-1 - D43-12 |
Disconnection of the battery ground terminal |
114 to 126 Ω |
Brake actuator ASSY |
| D43-9 - D43-20 |
Disconnection of the battery ground terminal |
114 to 126 Ω |
Wiring harness connector (CAN J/C1) |
| D43-5-D10-6 |
Disconnection of the battery ground terminal |
Less than 1 Ω |
DLC3 |
| D43-16-D10-14 |
Disconnection of the battery ground terminal |
Less than 1 Ω |
DLC3 |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (CAN J/C RH) |
| *b |
To the brake actuator ASSY |
| *c |
To the wiring harness connector (CAN J/C1) |
| *d |
To DLC3 |
B
>Repair or replacement of CAN bus main line or connector (Wiring harness connector (CAN J/C1) - Wiring harness connector (CAN J/C2))
C
>Repair or replacement of CAN bus main line or connector (Wiring harness connector (CAN J/C2) - brake actuator ASSY)
D
>Repair or replacement of the CAN bus sub-line or connectors (CAN J/C2 - DLC3)
A▼
Replacement of the wiring harness connector (CAN J/C2)
| 63 Ω or more (LHD model) |
|---|
Description of functions
If the resistance between the data link connector 6 (CANH) ←→ 14(CANL) is 63 Ω or more, CAN bus main line or the sub-line to the data link connector may be open.
| Symptoms |
Possible cause |
|---|---|
| Resistance between the data link connectors 6 (CANH) ←→ 14 (CANL) is 64 Ω or more |
·Open circuit in the sub-line or defective connector in the data link connector ·Open circuit in CAN bus main line or connector defect ·Wiring harness connector (CAN J/C1) ·Wiring harness connector (CAN J/C2) ·Engine control computer, internal error ·Brake actuator ASSY, internal error |
This malfunction is not caused by CAN bus sub-line or each ECM and sensor connected to CAN bus sub-line.
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for open circuit in CAN bus sub-line (sub-line to data link connector)
(1) Disconnect the battery ground terminal.
(2) Use the tester to measure the resistance between terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| D10-6 - D10-14 |
Disconnection of the battery ground terminal |
57 to 63Ω |
Captions in illustration
| *1 |
Data link connector |
CAUTION:
When the measured value is 63 Ω or more and CAN communication system DTC is output, there may be a defect besides the open circuit in the data link connector sub-line. Repair the defective part first, and then follow the procedure again described in ‘How to troubleshoot’. (Refer to )
)OK
>CAN bus is normal.
NG▼
2.
Checking for open circuit in CAN bus main line (Engine control computer)
(1) Disconnect the vehicle harness connector A33 from the engine control computer.
NG
> Go to Step 3
OK▼
Replacement of the engine control computer (Refer to )
)3.
Checking for an open circuit in CAN bus main line (Brake actuator ASSY)
(1) Reconnect the vehicle harness connector A33 to the engine control computer.
(2) Disconnect the vehicle harness connector A5 from the brake actuator ASSY.
NG
> Go to Step 4
OK▼
Replacement of the brake actuator ASSY (Refer to )
)4.
Checking for open circuit in CAN bus main line (Wiring harness connector (CAN J/C2))
(1) Reconnect the vehicle harness connector A5 to the brake actuator ASSY.
(2) Disconnect the vehicle wiring harness connector D43 from the wiring harness connector (CAN J/C2).
(3) Measure the resistance between the terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
Connecting to |
|---|---|---|---|
| D43-1 - D43-12 |
Disconnection of the battery ground terminal |
114 to 126 Ω |
Wiring harness connector (CAN J/C1) |
| D43-9 - D43-20 |
Disconnection of the battery ground terminal |
114 to 126 Ω |
Engine control computer |
| D43-5-D10-6 |
Disconnection of the battery ground terminal |
Less than 1 Ω |
DLC3 |
| D43-16-D10-14 |
Disconnection of the battery ground terminal |
Less than 1 Ω |
DLC3 |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (To CAN No.2 junction connector) |
| *b |
To CAN No.1 junction connector |
| *c |
To the engine control computer |
| *d |
To DLC3 |
B
>Repair or replacement of CAN bus main line or connector (Wiring harness connector (CAN J/C1) - Engine control computer)
C
> Go to Step 5
D
>Repair or replacement of the CAN bus sub-line or connectors (CAN J/C2 - DLC3)
A▼
Replacement of the wiring harness connector (CAN J/C2)
5.
Checking for open circuit in CAN bus main line (Wiring harness connector (CAN No.2 J/C - CAN No.1 J/C))
(1) Connect the wiring harness connector to CAN No.2 junction connector.
(2) Disconnect the wiring harness connector from CAN No.1 junction connector.
(3) Measure the resistance between the terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
Connecting to |
|---|---|---|---|
| A17-6 - A17-17 |
Disconnection of the battery ground terminal |
114 to 126 Ω |
Brake actuator ASSY |
| A17-7 - A17-18 |
Disconnection of the battery ground terminal |
114 to 126 Ω |
Wiring harness connector (CAN J/C2) |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (To CAN No.1 junction connector) |
| *b |
To the skid control ECM (Brake actuator ASSY) |
| *c |
To CAN No.2 junction connector |
B
>Repair or replacement of CAN bus main line or connector (CAN No.1 J/C - CAN No.2 J/C)
C
>Repair or replacement of CAN bus main line or connector (CAN No.1 J/C - Skid control ECM (Brake actuator ASSY))
A▼
Replacement of the wiring harness connector (CAN J/C1)
| Less than 57 Ω (RHD model) |
|---|
Description of functions
If the resistance between the data link connector 6 (CANH) and 14(CANL) is less than 57 Ω, there may be a line-to-line short in CAN bus.
| Symptoms |
Possible cause |
| Resistance between the data link connectors 6 (CANH) ←→ 14 (CANL) is less than 57 Ω |
·Short between CAN bus main lines ·Short between CAN bus sub-lines ·Main body ECM (Multiplex network body computer) ·Combination meter ASSY ·Collation ECM (Smart key computer ASSY) *1 ·Engine control computer ·Transmission control computer ASSY *2 ·Brake actuator ASSY ·Spiral cable SUB-ASSY (with sensor) ·Power steering computer ASSY ·Air conditioner amplifier ASSY *3 ·Airbag sensor ASSY ·Accessory connector ·Wiring harness connector (CAN J/C1) ·Wiring harness connector (CAN J/C2) |
*1: With smart entry
*2: Transmission A/T
*3: For automatic air conditioning system
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for line-to-line short in CAN bus (Engine control computer)
(1) Disconnect the battery ground terminal.
(2) Disconnect the vehicle wiring harness connector A33 from the engine control computer.
(3) Measure the resistance between the terminals.
Resistance
| Inspection terminals (Terminal symbol) |
Inspection conditions |
Standard value |
|---|---|---|
| A33-19 - A33-18 |
Disconnection of the battery ground terminal |
114 to 126 Ω |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Engine control computer) |
NG
> Go to Step 2
OK▼
Replacement of the engine control computer (Refer to )
)2.
Checking for line-to-line short in CAN bus (Brake actuator ASSY)
(1) Reconnect the vehicle wiring harness connector A33 to the engine control computer.
(2) Disconnect the vehicle harness connector A5 from the brake actuator ASSY.
(3) Measure the resistance between the terminals.
Resistance
| Inspection terminals (Terminal symbol) |
Inspection conditions |
Standard value |
|---|---|---|
| A5-26 - A5-14 |
Disconnection of the battery ground terminal |
114 to 126 Ω |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Brake actuator ASSY) |
NG
> Go to Step 3
OK▼
Replacement of the brake actuator ASSY (Refer to )
)3.
Checking for line-to-line short in CAN bus (Wiring harness connector (CAN J/C2))
(1) Reconnect the vehicle wiring harness connector A5 to the brake actuator ASSY.
(2) Disconnect the vehicle harness connector D43 from the wiring harness connector (CAN J/C2).
(3) Measure the resistance between the terminals.
Resistance
| Inspection terminals (Terminal symbol) |
Inspection conditions |
Standard value |
Connecting to |
|---|---|---|---|
| D43-1 - D43-12 |
Disconnection of the battery ground terminal |
114 to 126 Ω |
Brake actuator ASSY |
| D43-2 - D43-13 |
Disconnection of the battery ground terminal |
200Ω or more |
Combination meter ASSY |
| D43-3 - D43-14 |
Disconnection of the battery ground terminal |
200Ω or more |
Main body ECM (Multiplex network body computer) |
| D43-4 - D43-15 |
Disconnection of the battery ground terminal |
200Ω or more |
Collation ECM (Smart key computer ASSY) |
| D43-5 - D43-16 |
Disconnection of the battery ground terminal |
1 M Ω or more |
Data link connector |
| D43-6 - D43-17 |
Disconnection of the battery ground terminal |
200Ω or more |
Spiral cable SUB-ASSY (with sensor) |
| D43-7 - D43-18 |
Disconnection of the battery ground terminal |
1 M Ω or more |
Accessory connector |
| D43-8 - D43-19 |
Disconnection of the battery ground terminal |
200Ω or more |
Airbag sensor ASSY |
| D43-9 - D43-20 |
Disconnection of the battery ground terminal |
114 to 126Ω |
Wiring harness connector (CAN J/C1) |
| D43-10 - D43-21 |
Disconnection of the battery ground terminal |
200Ω or more |
Air conditioner amplifier ASSY |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Wiring harness connector (CAN J/C2)) |
| *b |
To the brake actuator ASSY |
| *c |
To the combination meter ASSY |
| *d |
To the main body ECM (Multiplex network body computer) |
| *e |
To the collation ECM (Smart key computer ASSY) |
| *f |
To the data link connector |
| *g |
To the spiral cable SUB-ASSY (with sensor) |
| *h |
Accessory connector |
| *i |
To the airbag sensor ASSY |
| *j |
To the wiring harness connector (CAN J/C1) |
| *k |
To the air conditioner amplifier ASSY |
Criteria
| Result |
Go to |
|---|---|
| OK (No line-to-line short circuit) |
A |
| NG (Line-to-line short in the main line to the wiring harness connector (CAN J/C1)) |
B |
| NG (Line-to-line short in the brake actuator ASSY connection main line) |
C |
| NG (Line-to-line short in the line to ECM and sensor) |
D |
| NG (Line-to-line short in the sub-line to the data link connector or the sub-line to the accessory connector) |
E |
B
> Go to Step 4
C
> Go to Step 7
D
> Go to Step 5
E
>Repair or replacement of CAN bus sub-line or connector
A▼
Replacement of the wiring harness connector (CAN J/C2)
4.
Checking for line-to-line short in CAN bus (Wiring harness connector (CAN J/C1))
(1) Disconnect the vehicle harness connector A17 from the wiring harness connector (CAN J/C1).
(2) Measure the resistance between the terminals.
Resistance
| Inspection terminals (Terminal symbol) |
Inspection conditions |
Standard value |
Connecting to |
|---|---|---|---|
| A17-5 - A17-16 |
Disconnection of the battery ground terminal |
200Ω or more |
Transmission control computer ASSY |
| A17-6 - A17-17 |
Disconnection of the battery ground terminal |
1 M Ω or more |
Wiring harness connector (CAN J/C2) |
| A17-7 - A17-18 |
Disconnection of the battery ground terminal |
114 to 126Ω |
Engine control computer |
| A17-8 - A17-19 |
Disconnection of the battery ground terminal |
200Ω or more |
Power steering computer ASSY |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector Wiring harness connector (CAN J/C1) |
| *b |
To the transmission control computer ASSY |
| *c |
To the wiring harness connector (CAN J/C2) |
| *d |
To the engine control computer |
| *e |
To the power steering computer ASSY |
B
>Repair or replacement of CAN bus main line or connector (Wiring harness connector (CAN J/C2) - Wiring harness connector (CAN J/C1))
C
> Go to Step 6
D
> Go to Step 5
A▼
Replacement of the wiring harness connector (CAN J/C1)
5.
Checking for line-to-line short in CAN bus (ECM and sensor line)
(1) Reconnect all connections to the wiring harness connectors (CAN J/C1 and CAN J/C2).
(2) From the ECM and sensor relevant with line-to-line short circuit, disconnect the connectors with CAN-H and CAN-L terminals.
If line-to-line shorts were confirmed in multiple locations, disconnect all connectors, including the corresponding ECM and the sensor's CANH and CANL terminals. (Refer to for ECM terminal arrangement)
for ECM terminal arrangement)
(3) Measure the resistance between the terminals.
Resistance
| Inspection terminals (Terminal symbol) |
Inspection conditions |
Standard value |
|---|---|---|
| D10-6 - D10-14 |
Disconnection of the battery ground terminal |
57 to 63Ω |
Captions in illustration
| *1 |
Data link connector |
NOTE:
·If the resistance is less than 57 Ω with the ECM and sensor connected (line-to-line short), there may be a ECM internal short.
·If the resistance returns to normal with the ECM and sensor disconnected, there may be an internal short within the ECM and sensor.
·When more than one ECM or sensor is disconnected, reconnect the part one by one to check the resistance. If an ECM or sensor shows an abnormal value, replace it. After that, reconnect all ECMs and sensors to check if the resistance returns to normal.
·If the resistance does not return to normal with the ECM and sensor disconnected, repair or replace the wire harness and the connector in which line-to-line short has been detected.
·If the resistance returns to normal with the ECM and sensor disconnected, there may be an internal short within the ECM and sensor.
·When more than one ECM or sensor is disconnected, reconnect the part one by one to check the resistance. If an ECM or sensor shows an abnormal value, replace it. After that, reconnect all ECMs and sensors to check if the resistance returns to normal.
·If the resistance does not return to normal with the ECM and sensor disconnected, repair or replace the wire harness and the connector in which line-to-line short has been detected.
NG
>Repair or replacement of the wiring harness
OK▼
Replacement of the ECM/sensor
6.
Checking for line-to-line short in CAN bus termination (Engine control computer)
(1) Disconnect the vehicle wiring harness connector A33 from the engine control computer.
NG
>Repair or replacement of the wiring harness and the connector where the line-to-line short was confirmed.
OK▼
Replacement of the engine control computer
7.
Check for line-to-line short in CAN bus terminations (Brake actuator ASSY)
(1) Disconnect the vehicle wiring harness connector A5 of the brake actuator ASSY.
NG
>Repair or replacement of the wiring harness and the connector where the line-to-line short was confirmed.
OK▼
Replacement of the brake actuator ASSY
| Less than 57 Ω (LHD model) |
|---|
Description of functions
If the resistance between the data link connector 6 (CANH) and 14(CANL) is less than 57 Ω, there may be a line-to-line short in CAN bus.
| Symptoms |
Possible cause |
| Resistance between the data link connectors 6 (CANH) ←→ 14 (CANL) is less than 57 Ω |
·Short between CAN bus main lines ·Short between CAN bus sub-lines ·Main body ECM (Multiplex network body computer) ·Combination meter ASSY ·Collation ECM (Smart key computer ASSY) *1 ·Engine control computer ·Transmission control computer ASSY *2 ·Brake actuator ASSY ·Spiral cable SUB-ASSY (with sensor) ·Power steering computer ASSY ·Air conditioner amplifier ASSY *3 ·Airbag sensor ASSY ·Accessory connector ·Wiring harness connector (CAN J/C1) ·Wiring harness connector (CAN J/C2) |
*1: With smart entry
*2: Transmission A/T
*3: For automatic air conditioning system
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for line-to-line short in CAN bus (Engine control computer)
(1) Disconnect the battery ground terminal.
(2) Disconnect the vehicle wiring harness connector A33 from the engine control computer.
(3) Measure the resistance between the terminals.
Resistance
| Inspection terminals (Terminal symbol) |
Inspection conditions |
Standard value |
|---|---|---|
| A33-19 - A33-18 |
Disconnection of the battery ground terminal |
114 to 126 Ω |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Engine control computer) |
NG
> Go to Step 2
OK▼
Replacement of the engine control computer (Refer to )
)2.
Checking for line-to-line short in CAN bus (Brake actuator ASSY)
(1) Reconnect the vehicle wiring harness connector A33 to the engine control computer.
(2) Disconnect the vehicle harness connector A5 from the brake actuator ASSY.
(3) Measure the resistance between the terminals.
Resistance
| Inspection terminals (Terminal symbol) |
Inspection conditions |
Standard value |
|---|---|---|
| A5-26 - A5-14 |
Disconnection of the battery ground terminal |
114 to 126 Ω |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Brake actuator ASSY) |
NG
> Go to Step 3
OK▼
Replacement of the brake actuator ASSY (Refer to )
)3.
Checking for line-to-line short in CAN bus (Wiring harness connector (CAN J/C2))
(1) Reconnect the vehicle wiring harness connector A5 to the brake actuator ASSY.
(2) Disconnect the vehicle harness connector D43 from the wiring harness connector (CAN J/C2).
(3) Measure the resistance between the terminals.
Resistance
| Inspection terminals (Terminal symbol) |
Inspection conditions |
Standard value |
Connecting to |
|---|---|---|---|
| D43-1 - D43-12 |
Disconnection of the battery ground terminal |
114 to 126Ω |
Wiring harness connector (CAN J/C1) |
| D43-2 - D43-13 |
Disconnection of the battery ground terminal |
200Ω or more |
Combination meter ASSY |
| D43-3 - D43-14 |
Disconnection of the battery ground terminal |
200Ω or more |
Main body ECM (Multiplex network body computer) |
| D43-4 - D43-15 |
Disconnection of the battery ground terminal |
200Ω or more |
Collation ECM (Smart key computer ASSY) |
| D43-5 - D43-16 |
Disconnection of the battery ground terminal |
1 M Ω or more |
Data link connector |
| D43-6 - D43-17 |
Disconnection of the battery ground terminal |
200Ω or more |
Spiral cable SUB-ASSY (with sensor) |
| D43-7 - D43-18 |
Disconnection of the battery ground terminal |
1 M Ω or more |
Accessory connector |
| D43-8 - D43-19 |
Disconnection of the battery ground terminal |
200Ω or more |
Airbag sensor ASSY |
| D43-9 - D43-20 |
Disconnection of the battery ground terminal |
114 to 126Ω |
Engine control computer |
| D43-10 - D43-21 |
Disconnection of the battery ground terminal |
200Ω or more |
Air conditioner amplifier ASSY |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Wiring harness connector (CAN J/C2)) |
| *b |
To the wiring harness connector (CAN J/C1) |
| *c |
To the combination meter ASSY |
| *d |
To the main body ECM (Multiplex network body computer) |
| *e |
To the collation ECM (Smart key computer ASSY) |
| *f |
To the data link connector |
| *g |
To the spiral cable SUB-ASSY (with sensor) |
| *h |
To the accessory connector |
| *i |
To the airbag sensor ASSY |
| *j |
To the engine control computer |
| *k |
To the air conditioner amplifier ASSY |
Criteria
| Result |
Go to |
|---|---|
| OK (No line-to-line short circuit) |
A |
| NG (Line-to-line short in the main line to the wiring harness connector (CAN J/C1)) |
B |
| NG (Line-to-line short in the main line to the engine control computer) |
C |
| NG (Line-to-line short in the line to ECM and sensor) |
D |
| NG (Line-to-line short in the sub-line to the data link connector) |
E |
B
> Go to Step 4
C
> Go to Step 6
D
> Go to Step 5
E
>Repair or replacement of CAN bus sub-line or connector
A▼
Replacement of the wiring harness connector (CAN J/C2)
4.
Checking for line-to-line short in CAN bus (Wiring harness connector (CAN J/C1))
(1) Disconnect the vehicle harness connector A17 from the wiring harness connector (CAN J/C1).
(2) Measure the resistance between the terminals.
Resistance
| Inspection terminals (Terminal symbol) |
Inspection conditions |
Standard value |
Connecting to |
|---|---|---|---|
| A17-5 - A17-16 |
Disconnection of the battery ground terminal |
200Ω or more |
Transmission control computer ASSY |
| A17-6 - A17-17 |
Disconnection of the battery ground terminal |
114 to 126 Ω |
Skid control ECM (Brake actuator ASSY) |
| A17-7 - A17-18 |
Disconnection of the battery ground terminal |
1 M Ω or more |
Wiring harness connector (CAN J/C2) |
| A17-8 - A17-19 |
Disconnection of the battery ground terminal |
200Ω or more |
Power steering computer ASSY |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector Wiring harness connector (CAN J/C1) |
| *b |
To the transmission control computer ASSY |
| *c |
To the skid control ECM (Brake actuator ASSY) |
| *d |
To CAN No.2 junction connector |
| *e |
To the power steering computer ASSY |
B
>Repair or replacement of CAN bus main line or connector (Wiring harness connector (CAN J/C2) - Wiring harness connector (CAN J/C1))
C
> Go to Step 7
D
> Go to Step 5
A▼
Replacement of the wiring harness connector (CAN J/C1)
5.
Checking for line-to-line short in CAN bus (ECM and sensor line)
(1) Reconnect all connections to the wiring harness connectors (CAN J/C1 and CAN J/C2).
(2) From the ECM and sensor relevant with line-to-line short circuit, disconnect the connectors with CAN-H and CAN-L terminals. (Refer to for ECM terminal arrangement)
for ECM terminal arrangement)
NOTE:
In case of more than one line-to-line short circuit, disconnect all connectors including CANH and CANL terminals of the ECM and sensor.
(3) Measure the resistance between the terminals.
Resistance
| Inspection terminals (Terminal symbol) |
Inspection conditions |
Standard value |
|---|---|---|
| D10-6 - D10-14 |
Disconnection of the battery ground terminal |
57 to 63 Ω |
Captions in illustration
| *1 |
Data link connector |
NOTE:
·If the resistance is less than 57 Ω with the ECM and sensor connected (line-to-line short), there may be a ECM internal short.
·If the resistance returns to normal with the ECM and sensor disconnected, there may be an internal short within the ECM and sensor.
·When more than one ECM or sensor is disconnected, reconnect the part one by one to check the resistance. If an ECM or sensor shows an abnormal value, replace it. After that, reconnect all ECMs and sensors to check if the resistance returns to normal.
·If the resistance does not return to normal with the ECM and sensor disconnected, repair or replace the wire harness and the connector in which line-to-line short has been detected.
·If the resistance returns to normal with the ECM and sensor disconnected, there may be an internal short within the ECM and sensor.
·When more than one ECM or sensor is disconnected, reconnect the part one by one to check the resistance. If an ECM or sensor shows an abnormal value, replace it. After that, reconnect all ECMs and sensors to check if the resistance returns to normal.
·If the resistance does not return to normal with the ECM and sensor disconnected, repair or replace the wire harness and the connector in which line-to-line short has been detected.
NG
>Repair or replacement of the wiring harness
OK▼
Replacement of the ECM/sensor
6.
Checking for line-to-line short in CAN bus termination (Engine control computer)
(1) Disconnect the vehicle wiring harness connector A33 from the engine control computer.
NG
>Repair or replacement of the wiring harness and the connector where the line-to-line short was confirmed.
OK▼
Replacement of the engine control computer
7.
Checking for line-to-line short in CAN bus terminations (Brake actuator ASSY)
(1) Disconnect the vehicle wiring harness connector A5 of the brake actuator ASSY.
NG
>Repair or replacement of the wiring harness and the connector where the line-to-line short was confirmed.
OK▼
Replacement of the brake actuator ASSY
| Checking for short to battery (RHD model) |
|---|
Description of functions
Main line or sub-line may be shorted to battery circuit or shorted to battery circuit within one of the control modules.
| Symptoms |
Possible cause |
| The voltage between the data link connector 6 (CANH), 14 (CANL) ←→ chassis ground is 5 V or more |
·CAN bus main line short to +B ·CAN bus sub-line short to +B ·Main body ECM (Multiplex network body computer) ·Combination meter ASSY ·Collation ECM (Smart key computer ASSY) *1 ·Engine control computer ·Transmission control computer ASSY *2 ·Brake actuator ASSY ·Spiral cable SUB-ASSY (with sensor) ·Power steering computer ASSY ·Air conditioner amplifier ASSY *3 ·Airbag sensor ASSY ·Accessory connector ·Wiring harness connector (CAN J/C1) ·Wiring harness connector (CAN J/C2) |
*1: With smart entry
*2: Transmission A/T
*3: For automatic air conditioning system
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for CAN bus line short to +B (Wiring harness connector (CAN J/C2))
(1) Reconnect the vehicle wiring harness connectors: A5 to the brake actuator ASSY and A33 to the engine control computer.
(2) Disconnect the vehicle harness connector D43 from the wiring harness connector (CAN J/C2).
(3) Measure the resistance between the terminal and +B.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
Connecting to |
|---|---|---|---|
| D43-1 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Brake actuator ASSY |
| D43-12 - +B |
|||
| D43-2 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Combination meter ASSY |
| D43-13 - +B |
|||
| D43-3 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Main body ECM (Multiplex network body computer) |
| D43-14 - +B |
|||
| D43-4 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Collation ECM (Smart key computer ASSY) |
| D43-15 - +B |
|||
| D43-5 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Data link connector |
| D43-16 - +B |
|||
| D43-6 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Spiral cable SUB-ASSY (with sensor) |
| D43-17 - +B |
|||
| D43-7 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Accessory connector |
| D43-18 - +B |
|||
| D43-8 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Airbag sensor ASSY |
| D43-19 - +B |
|||
| D43-9 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Wiring harness connector (CAN J/C1) |
| D43-20 - +B |
|||
| D43-10 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Air conditioner amplifier ASSY |
| D43-21 - +B |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Wiring harness connector (CAN J/C2)) |
| *b |
To the brake actuator ASSY |
| *c |
To the combination meter ASSY |
| *d |
To the main body ECM (Multiplex network body computer) |
| *e |
To the collation ECM (Smart key computer ASSY) |
| *f |
To the data link connector |
| *g |
To the spiral cable SUB-ASSY (with sensor) |
| *h |
Accessory connector |
| *i |
To the airbag sensor ASSY |
| *j |
To the wiring harness connector (CAN J/C1) |
| *k |
To the air conditioner amplifier ASSY |
Criteria
| Result |
Go to |
|---|---|
| OK (No short to battery) |
A |
| NG (Battery short in the main line to the wiring harness connector (CAN J/C1)) |
B |
| NG (Battery short in the brake actuator ASSY connection main line) |
C |
| NG (Battery short in the line to ECM and sensor) |
D |
| NG (Battery short in the sub-line to the data link connector or the sub-line to the accessory connector) |
E |
B
> Go to Step 2
C
> Go to Step 4
D
> Go to Step 3
E
>Repair or replacement of CAN bus sub-line or connector
A▼
Replacement of the wiring harness connector (CAN J/C2)
2.
Checking for CAN bus line short to +B (Wiring harness connector (CAN J/C1))
(1) Disconnect the vehicle harness connector A17 from the wiring harness connector (CAN J/C1).
(2) Measure the resistance between the terminal and +B.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
Connecting to |
|---|---|---|---|
| A17-5 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Transmission control computer ASSY |
| A17-16 - +B |
|||
| A17-6 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Wiring harness connector (CAN J/C2) |
| A17-17 - +B |
|||
| A17-7 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Engine control computer |
| A17-18 - +B |
|||
| A17-8 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Power steering computer ASSY |
| A17-19 - +B |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector Wiring harness connector (CAN J/C1) |
| *b |
To the transmission control computer ASSY |
| *c |
To the wiring harness connector (CAN J/C2) |
| *d |
To the engine control computer |
| *e |
To the power steering computer ASSY |
B
>Repair or replacement of CAN bus main line or connector (Wiring harness connector (CAN J/C2) - Wiring harness connector (CAN J/C1))
C
> Go to Step 5
D
> Go to Step 3
A▼
Replacement of the wiring harness connector (CAN J/C1)
3.
Checking for CAN bus short to +B (ECM/sensor)
(1) Reconnect all connections to the wiring harness connectors (CAN J/C1 and CAN J/C2).
(2) From the ECM and sensor side, disconnect the connectors, including the sensor's CANH and CANL terminals and the ECM relevant to the connector where the +B short was confirmed.
If +B shorts were confirmed in multiple locations, disconnect all connectors, including the corresponding ECM and the sensor's CANH and CANL terminals. (Refer to for ECM terminal arrangement)
for ECM terminal arrangement)
(3) Measure the resistance between the terminals.
Resistance
| Inspection terminals (Terminal symbol) |
Inspection conditions |
Standard value |
|---|---|---|
| D10-6 - D10-16 |
Disconnection of the battery ground terminal |
6 kΩ or more |
| D10-14 - D10-16 |
Captions in illustration
| *1 |
Data link connector |
NOTE:
·If the resistance returns to normal with the ECM and sensor disconnected, there may be an internal short within the ECM and sensor.
·When more than one ECM or sensor is disconnected, reconnect the part one by one to check the resistance. If an ECM or sensor shows an abnormal value, replace it. After that, reconnect all ECMs and sensors to check if the resistance returns to normal.
·If the resistance does not return to normal with the ECM/sensor disconnected, repair or replace the wire harness and connector in which +B short has been detected.
·When more than one ECM or sensor is disconnected, reconnect the part one by one to check the resistance. If an ECM or sensor shows an abnormal value, replace it. After that, reconnect all ECMs and sensors to check if the resistance returns to normal.
·If the resistance does not return to normal with the ECM/sensor disconnected, repair or replace the wire harness and connector in which +B short has been detected.
NG
>Repair or replacement of the wiring harness
OK▼
Replacement of the ECM/sensor
4.
Checking for +B short in CAN bus termination (Brake actuator ASSY)
(1) Disconnect the vehicle wiring harness connector A5 of the brake actuator ASSY.
NG
>Repair or replacement of the wiring harness and the connector in which +B short has been detected
OK▼
Replacement of the brake actuator ASSY
5.
Checking for GND short in CAN bus termination (Engine control computer)
(1) Disconnect the vehicle wiring harness connector A33 from the engine control computer.
NG
>Repair or replacement of the wiring harness and the connector in which +B short has been detected
OK▼
Replacement of the engine control computer
| Checking for short to battery (LHD model) |
|---|
Description of functions
Main line or sub-line may be shorted to battery circuit or shorted to battery circuit within one of the control modules.
| Symptoms |
Possible cause |
| The voltage between the data link connector 6 (CANH), 14 (CANL) ←→ chassis ground is 5 V or more |
·CAN bus main line short to +B ·CAN bus sub-line short to +B ·Main body ECM (Multiplex network body computer) ·Combination meter ASSY ·Collation ECM (Smart key computer ASSY) *1 ·Engine control computer ·Transmission control computer ASSY *2 ·Brake actuator ASSY ·Spiral cable SUB-ASSY (with sensor) ·Power steering computer ASSY ·Air conditioner amplifier ASSY *3 ·Airbag sensor ASSY ·Accessory connector ·Wiring harness connector (CAN J/C1) ·Wiring harness connector (CAN J/C2) |
*1: With smart entry
*2: Transmission A/T
*3: For automatic air conditioning system
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for CAN bus line short to +B (Wiring harness connector (CAN J/C2))
(1) Reconnect the vehicle wiring harness connectors: A5 to the brake actuator ASSY and A33 to the engine control computer.
(2) Disconnect the vehicle harness connector D43 from the wiring harness connector (CAN J/C2).
(3) Measure the resistance between the terminal and +B.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
Connecting to |
|---|---|---|---|
| D43-1 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Wiring harness connector (CAN J/C1) |
| D43-12 - +B |
|||
| D43-2 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Combination meter ASSY |
| D43-13 - +B |
|||
| D43-3 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Main body ECM (Multiplex network body computer) |
| D43-14 - +B |
|||
| D43-4 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Collation ECM (Smart key computer ASSY) |
| D43-15 - +B |
|||
| D43-5 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Data link connector |
| D43-16 - +B |
|||
| D43-6 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Spiral cable SUB-ASSY (with sensor) |
| D43-17 - +B |
|||
| D43-7 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Accessory connector |
| D43-18 - +B |
|||
| D43-8 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Airbag sensor ASSY |
| D43-19 - +B |
|||
| D43-9 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Engine control computer |
| D43-20 - +B |
|||
| D43-10 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Air conditioner amplifier ASSY |
| D43-21 - +B |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Wiring harness connector (CAN J/C2)) |
| *b |
To CAN No.1 junction connector |
| *c |
To the combination meter ASSY |
| *d |
To the main body ECM (Multiplex network body computer) |
| *e |
To the collation ECM (Smart key computer ASSY) |
| *f |
To the data link connector |
| *g |
To the spiral cable SUB-ASSY (with sensor) |
| *h |
To the accessory connector |
| *i |
To the airbag sensor ASSY |
| *j |
To the engine control computer |
| *k |
To the air conditioner amplifier ASSY |
Criteria
| Result |
Go to |
|---|---|
| OK (No short to battery) |
A |
| NG (Battery short in the main line to the wiring harness connector (CAN J/C1)) |
B |
| NG (Battery short in the main line to the engine control computer) |
C |
| NG (Battery short in the line to ECM and sensor) |
D |
| NG (Battery short in the sub-line to the data link connector or the sub-line to the accessory connector) |
E |
B
> Go to Step 2
C
> Go to Step 5
D
> Go to Step 3
E
>Repair or replacement of CAN bus sub-line or connector
A▼
Replacement of the wiring harness connector (CAN J/C2)
2.
Checking for CAN bus line short to +B (Wiring harness connector (CAN J/C1))
(1) Disconnect the vehicle harness connector A17 from the wiring harness connector (CAN J/C1).
(2) Measure the resistance between the terminal and +B.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
Connecting to |
|---|---|---|---|
| A17-5 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Transmission control computer ASSY |
| A17-16 - +B |
|||
| A17-6 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Skid control ECM (Brake actuator ASSY) |
| A17-17 - +B |
|||
| A17-7 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Wiring harness connector (CAN J/C2) |
| A17-18 - +B |
|||
| A17-8 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
Power steering computer ASSY |
| A17-19 - +B |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector Wiring harness connector (CAN J/C1) |
| *b |
To the transmission control computer ASSY |
| *c |
To the skid control ECM (Brake actuator ASSY) |
| *d |
To the wiring harness connector (CAN J/C2) |
| *e |
To the power steering computer ASSY |
B
>Repair or replacement of CAN bus main line or connector (Wiring harness connector (CAN J/C2) - Wiring harness connector (CAN J/C1))
C
> Go to Step 4
D
> Go to Step 3
A▼
Replacement of the wiring harness connector (CAN J/C1)
3.
Checking for CAN bus short to +B (ECM/sensor)
(1) Reconnect all connections to the wiring harness connectors (CAN J/C1 and CAN J/C2).
(2) From the ECM and sensor relevant with line-to-line short circuit, disconnect the connectors with CAN-H and CAN-L terminals. (Refer to for ECM terminal arrangement)
for ECM terminal arrangement)
NOTE:
In case of more than one +B short circuit, disconnect all connectors including CANH and CANL terminals of the ECM and sensor.
(3) Measure the resistance between the terminals.
Resistance
| Inspection terminals (Terminal symbol) |
Inspection conditions |
Standard value |
|---|---|---|
| D10-6 - +B |
Disconnection of the battery ground terminal |
6 kΩ or more |
| D10-14 - +B |
Captions in illustration
| *1 |
Data link connector |
NOTE:
·If the resistance returns to normal with the ECM and sensor disconnected, there may be an internal short within the ECM and sensor.
·When more than one ECM or sensor is disconnected, reconnect the part one by one to check the resistance. If an ECM or sensor shows an abnormal value, replace it. After that, reconnect all ECMs and sensors to check if the resistance returns to normal.
·If the resistance does not return to normal with the ECM/sensor disconnected, repair or replace the wire harness and connector in which +B short has been detected.
·When more than one ECM or sensor is disconnected, reconnect the part one by one to check the resistance. If an ECM or sensor shows an abnormal value, replace it. After that, reconnect all ECMs and sensors to check if the resistance returns to normal.
·If the resistance does not return to normal with the ECM/sensor disconnected, repair or replace the wire harness and connector in which +B short has been detected.
NG
>Repair or replacement of the wiring harness
OK▼
Replacement of the ECM/sensor
4.
Checking for +B short in CAN bus termination (Brake actuator ASSY)
(1) Disconnect the vehicle wiring harness connector A5 of the brake actuator ASSY.
NG
>Repair or replacement of the wiring harness and the connector in which +B short has been detected
OK▼
Replacement of the brake actuator ASSY
5.
Checking for +B short in CAN bus termination (Engine control computer)
(1) Disconnect the vehicle wiring harness connector A33 from the engine control computer.
NG
>Repair or replacement of the wiring harness and the connector in which +B short has been detected
OK▼
Replacement of the engine control computer
| Checking for short to ground (RHD model) |
|---|
Description of functions
Main line or sub-lines may be shorted to ground or shorted to ground within one of the control modules.
| Symptoms |
Possible cause |
| Resistance between the data link connector 6 (CANH), 14 (CANL) ←→ chassis ground is 10 Ω or less |
·CAN bus main line short to GND ·CAN bus sub-line short to GND ·Main body ECM (Multiplex network body computer) ·Combination meter ASSY ·Collation ECM (Smart key computer ASSY) *1 ·Engine control computer ·Transmission control computer ASSY *2 ·Brake actuator ASSY ·Spiral cable SUB-ASSY (with sensor) ·Power steering computer ASSY ·Air conditioner amplifier ASSY *3 ·Airbag sensor ASSY ·Accessory connector ·Wiring harness connector (CAN J/C1) ·Wiring harness connector (CAN J/C2) |
*1: With smart entry
*2: Transmission A/T
*3: For automatic air conditioning system
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for CAN bus line short to GND (Wiring harness connector (CAN J/C2))
(1) Reconnect the vehicle wiring harness connectors: A5 to the brake actuator ASSY and A33 to the engine control computer.
(2) Disconnect the vehicle harness connector D43 from the wiring harness connector (CAN J/C2).
(3) Measure the resistance between the terminal and GND.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
Connecting to |
|---|---|---|---|
| D43-1 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Brake actuator ASSY |
| D43-12 - GND |
|||
| D43-2 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Combination meter ASSY |
| D43-13 - GND |
|||
| D43-3 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Main body ECM (Multiplex network body computer) |
| D43-14 - GND |
|||
| D43-4 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Collation ECM (Smart key computer ASSY) |
| D43-15 - GND |
|||
| D43-5 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Data link connector |
| D43-16 - GND |
|||
| D43-6 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Spiral cable SUB-ASSY (with sensor) |
| D43-17 - GND |
|||
| D43-7 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Accessory connector |
| D43-18 - GND |
|||
| D43-8 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Airbag sensor ASSY |
| D43-19 - GND |
|||
| D43-9 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Wiring harness connector (CAN J/C1) |
| D43-20 - GND |
|||
| D43-10 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Air conditioner amplifier ASSY |
| D43-21 - GND |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Wiring harness connector (CAN J/C2)) |
| *b |
To the brake actuator ASSY |
| *c |
To the combination meter ASSY |
| *d |
To the main body ECM (Multiplex network body computer) |
| *e |
To the collation ECM (Smart key computer ASSY) |
| *f |
To the data link connector |
| *g |
To the spiral cable SUB-ASSY (with sensor) |
| *h |
Accessory connector |
| *i |
To the airbag sensor ASSY |
| *j |
To the wiring harness connector (CAN J/C1) |
| *k |
To the air conditioner amplifier ASSY |
Criteria
| Result |
Go to |
|---|---|
| OK (No short to ground) |
A |
| NG (Ground short in the main line to the wiring harness connector (CAN J/C1)) |
B |
| NG (Ground short in the main line to the brake actuator ASSY) |
C |
| NG (Ground short in the line to ECM and sensor) |
D |
| NG (Ground short in the sub-line to the data link connector or the sub-line to the accessory connector) |
E |
B
> Go to Step 2
C
> Go to Step 4
D
> Go to Step 3
E
>Repair or replacement of CAN bus sub-line or connector
A▼
Replacement of the wiring harness connector (CAN J/C2)
2.
Checking for CAN bus line short to GND (Wiring harness connector (CAN J/C1))
(1) Disconnect the vehicle harness connector A17 from the wiring harness connector (CAN J/C1).
(2) Measure the resistance between the terminal and GND.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
Connecting to |
|---|---|---|---|
| A17-5 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Transmission control computer ASSY |
| A17-16 - GND |
|||
| A17-6 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Wiring harness connector (CAN J/C2) |
| A17-17 - GND |
|||
| A17-7 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Engine control computer |
| A17-18 - GND |
|||
| A17-8 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Power steering computer ASSY |
| A17-19 - GND |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector Wiring harness connector (CAN J/C1) |
| *b |
To the transmission control computer ASSY |
| *c |
To the wiring harness connector (CAN J/C2) |
| *d |
To the engine control computer |
| *e |
To the power steering computer ASSY |
B
>Repair or replacement of CAN bus main line or connector (Wiring harness connector (CAN J/C2) - Wiring harness connector (CAN J/C1))
C
> Go to Step 5
D
> Go to Step 3
A▼
Replacement of the wiring harness connector (CAN J/C1)
3.
Checking for CAN bus line short to GND (ECM/sensor)
(1) Reconnect all connections to the wiring harness connectors (CAN J/C1 and CAN J/C2).
(2) From the ECM and sensor relevant with line-to-line short circuit, disconnect the connectors with CAN-H and CAN-L terminals.
If GND shorts were confirmed in multiple locations, disconnect all connectors, including the corresponding ECM and the sensor's CANH and CANL terminals. (Refer to for ECM terminal arrangement)
for ECM terminal arrangement)
(3) Measure the resistance between the terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| D10-6 - D10-4 |
Disconnection of the battery ground terminal |
200Ω or more |
| D10-14 - D10-4 |
Captions in illustration
| *1 |
Data link connector |
NOTE:
·If the resistance returns to normal with the ECM and sensor disconnected, there may be an internal short within the ECM and sensor.
·When more than one ECM or sensor is disconnected, reconnect the part one by one to check the resistance. If an ECM or sensor shows an abnormal value, replace it. After that, reconnect all ECMs and sensors to check if the resistance returns to normal.
·If the resistance does not return to normal with the ECM/sensor disconnected, repair or replace the wire harness and connector in which GND short has been detected.
·When more than one ECM or sensor is disconnected, reconnect the part one by one to check the resistance. If an ECM or sensor shows an abnormal value, replace it. After that, reconnect all ECMs and sensors to check if the resistance returns to normal.
·If the resistance does not return to normal with the ECM/sensor disconnected, repair or replace the wire harness and connector in which GND short has been detected.
NG
>Repair or replacement of the wiring harness
OK▼
Replacement of the ECM/sensor
4.
Checking for +GND short in CAN bus termination (Brake actuator ASSY)
(1) Disconnect the vehicle wiring harness connector A5 of the brake actuator ASSY.
NG
>Repair or replacement of the wiring harness and the connector in which GND short has been detected
OK▼
Replacement of the brake actuator ASSY
5.
Checking for GND short in CAN bus termination (Engine control computer)
(1) Disconnect the vehicle wiring harness connector A33 from the engine control computer.
NG
>Repair or replacement of the wiring harness and the connector in which GND short has been detected
OK▼
Replacement of the engine control computer
| Checking for short to ground (LHD model) |
|---|
Description of functions
Main line or sub-lines may be shorted to ground or shorted to ground within one of the control modules.
| Symptoms |
Possible cause |
| Resistance between the data link connector 6 (CANH), 14 (CANL) ←→ chassis ground is 10 Ω or less |
·CAN bus main line short to GND ·CAN bus sub-line short to GND ·Main body ECM (Multiplex network body computer) ·Combination meter ASSY ·Collation ECM (Smart key computer ASSY) *1 ·Engine control computer ·Transmission control computer ASSY *2 ·Brake actuator ASSY ·Spiral cable SUB-ASSY (with sensor) ·Power steering computer ASSY ·Air conditioner amplifier ASSY *3 ·Airbag sensor ASSY ·Accessory connector ·Wiring harness connector (CAN J/C1) ·Wiring harness connector (CAN J/C2) |
*1: With smart entry
*2: Transmission A/T
*3: For automatic air conditioning system
Circuit figure
Inspection steps
CAUTION:
·Before measuring the resistance of CAN bus, turn the ignition OFF and leave the vehicle as is for at least one minute without operating keys, switches, and doors. Disconnect the battery and wait for another one minute or more.
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to)
·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to)
·If DTC related with CAN communication system is output, always start the troubleshooting according to the procedure described in “How to troubleshoot”. (Refer to
)·When the repair is complete, follow DTC check procedure to confirm the same DTC does not recur.
DTC check procedure: Wait 60 seconds or more after IG ON, then drive the vehicle at 15 km/h or more for at least one second.
·After turning the ignition switch to OFF, you may have to wait for a while before disconnecting the battery terminals. Check appropriate precautions for battery terminal disconnection before proceeding. (Refer to
)NOTE:
·Before disconnecting a connector, check for loose or unplugged connection by pushing back the connector case.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
·After disconnecting the connector, make sure that its terminal and the case have no damage, deformation, or corrosion.
1.
Checking for CAN bus line short to GND (Wiring harness connector (CAN J/C2))
(1) Reconnect the vehicle wiring harness connectors: A5 to the brake actuator ASSY and A33 to the engine control computer.
(2) Disconnect the vehicle harness connector D43 from the wiring harness connector (CAN J/C2).
(3) Measure the resistance between the terminal and GND.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
Connecting to |
|---|---|---|---|
| D43-1 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Wiring harness connector (CAN J/C1) |
| D43-12 - GND |
|||
| D43-2 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Combination meter ASSY |
| D43-13 - GND |
|||
| D43-3 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Main body ECM (Multiplex network body computer) |
| D43-14 - GND |
|||
| D43-4 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Collation ECM (Smart key computer ASSY) |
| D43-15 - GND |
|||
| D43-5 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Data link connector |
| D43-16 - GND |
|||
| D43-6 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Spiral cable SUB-ASSY (with sensor) |
| D43-17 - GND |
|||
| D43-7 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Accessory connector |
| D43-18 - GND |
|||
| D43-8 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Airbag sensor ASSY |
| D43-19 - GND |
|||
| D43-9 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Engine control computer |
| D43-20 - GND |
|||
| D43-10 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Air conditioner amplifier ASSY |
| D43-21 - GND |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector (Wiring harness connector (CAN J/C2)) |
| *b |
To the wiring harness connector (CAN J/C1) |
| *c |
To the combination meter ASSY |
| *d |
To the main body ECM (Multiplex network body computer) |
| *e |
To the collation ECM (Smart key computer ASSY) |
| *f |
To the data link connector |
| *g |
To the spiral cable SUB-ASSY (with sensor) |
| *h |
To the accessory connector |
| *i |
To the airbag sensor ASSY |
| *j |
To the engine control computer |
| *k |
To the air conditioner amplifier ASSY |
Criteria
| Result |
Go to |
|---|---|
| OK (No short to ground) |
A |
| NG (Ground short in the main line to the wiring harness connector (CAN J/C1)) |
B |
| NG (Ground short in the main line to the engine control computer) |
C |
| NG (Ground short in the line to ECM and sensor) |
D |
| NG (Ground short in the sub-line to the data link connector) |
E |
B
> Go to Step 2
C
> Go to Step 5
D
> Go to Step 3
E
>Repair or replacement of CAN bus sub-line or connector
A▼
Replacement of the wiring harness connector (CAN J/C2)
2.
Checking for CAN bus line short to GND (Wiring harness connector (CAN J/C1))
(1) Disconnect the vehicle harness connector A17 from the wiring harness connector (CAN J/C1).
(2) Measure the resistance between the terminal and GND.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
Connecting to |
|---|---|---|---|
| A17-5 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Transmission control computer ASSY |
| A17-16 - GND |
|||
| A17-6 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Skid control ECM (Brake actuator ASSY) |
| A17-17 - GND |
|||
| A17-7 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Wiring harness connector (CAN J/C2) |
| A17-18 - GND |
|||
| A17-8 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
Power steering computer ASSY |
| A17-19 - GND |
Captions in illustration
| *a |
Front side of vehicle wiring harness connector Wiring harness connector (CAN J/C1) |
| *b |
To the transmission control computer ASSY |
| *c |
To the skid control ECM (Brake actuator ASSY) |
| *d |
To the wiring harness connector (CAN J/C2) |
| *e |
To the power steering computer ASSY |
B
>Repair or replacement of CAN bus main line or connector (Wiring harness connector (CAN J/C2) - Wiring harness connector (CAN J/C1))
C
> Go to Step 4
D
> Go to Step 3
A▼
Replacement of the wiring harness connector (CAN J/C1)
3.
Checking for CAN bus line short to GND (ECM/sensor)
(1) Reconnect all connections to the wiring harness connectors (CAN J/C1 and CAN J/C2).
(2) From the ECM and sensor relevant with GND short circuit, disconnect the connectors with CAN-H and CAN-L terminals. (Refer to for ECM terminal arrangement)
for ECM terminal arrangement)
NOTE:
In case of more than one GND short circuit, disconnect all connectors including CANH and CANL terminals of the ECM and sensor.
(3) Measure the resistance between the terminals.
Resistance
| Inspection terminals |
Inspection conditions |
Standard value |
|---|---|---|
| D10-6 - GND |
Disconnection of the battery ground terminal |
200Ω or more |
| D10-14 - GND |
Captions in illustration
| *1 |
Data link connector |
NOTE:
·If the resistance returns to normal with the ECM and sensor disconnected, there may be an internal short within the ECM and sensor.
·When more than one ECM or sensor is disconnected, reconnect the part one by one to check the resistance. If an ECM or sensor shows an abnormal value, replace it. After that, reconnect all ECMs and sensors to check if the resistance returns to normal.
·If the resistance does not return to normal with the ECM/sensor disconnected, repair or replace the wire harness and connector in which GND short has been detected.
·When more than one ECM or sensor is disconnected, reconnect the part one by one to check the resistance. If an ECM or sensor shows an abnormal value, replace it. After that, reconnect all ECMs and sensors to check if the resistance returns to normal.
·If the resistance does not return to normal with the ECM/sensor disconnected, repair or replace the wire harness and connector in which GND short has been detected.
NG
>Repair or replacement of the wiring harness
OK▼
Replacement of the ECM/sensor
4.
Checking for GND short in CAN bus termination (Brake actuator ASSY)
(1) Disconnect the vehicle wiring harness connector A5 of the brake actuator ASSY.
NG
>Repair or replacement of the wiring harness and the connector in which GND short has been detected
OK▼
Replacement of the brake actuator ASSY
5.
Checking for GND short in CAN bus termination (Engine control computer)
(1) Disconnect the vehicle wiring harness connector A33 from the engine control computer.
NG
>Repair or replacement of the wiring harness and the connector in which GND short has been detected
OK▼
Replacement of the engine control computer
| DTC | U1201 | High-speed CAN failure/error counter failure |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
Checking CAN communication circuit
(1) Check CAN communication circuit. (Refer to )
)
Criteria
: No fault is found.
NO
>Follow the repair procedure described in “CAN communication circuit check”.
YES▼
2.
DTC check
(1) Start the engine.
(2) Use SSM3 to read DTC detected on CAN system.
Criteria
: U0073 is not output
NO
>Perform the diagnosis of U0073. (Refer to )
)YES▼
3.
DTC check
(1) Use SSM3 to read DTC detected on CAN system.
Criteria
: U1201 is output
NO
>A temporary communication error may have occurred. Clear the memory.
YES▼
4.
DTC check
(1) Turn the ignition switch OFF and then ON again.
(2) Use SSM3 to read DTC detected on CAN system.
Criteria
: U1201 is output
NO
>A temporary communication error may have occurred. Clear the memory.
YES▼
5.
Control module check
(1) Turn the ignition switch to OFF.
(2) Disconnect the control modules in the proper sequence.
NOTE:
When disconnecting ECM or brake actuator ASSY, connect the resistance of 120 Ω between CAN-Hi and CAN-Lo to substitute a termination resistor.
(3) Turn the ignition switch to ON.
(4) Use SSM3 to read DTC detected on CAN system.
Criteria
: U1201 is no longer output
NO
>Repeat Step 5 until U1201 is not detected.
YES▼
Replace the control module which has been removed when no DTC is output.
| DTC | U0073 | CAN failure/A system bus OFF detection |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Start the engine.
(2) Use SSM3 to read DTC detected on CAN system.
Criteria
: U0073 is output
NO
>A temporary communication error may have occurred. Clear the memory.
YES▼
2.
Checking CAN communication circuit
(1) Check CAN communication circuit. (Refer to )
)
Criteria
: No fault is found.
NO
>Follow the repair procedure described in “CAN communication circuit check”.
YES▼
3.
DTC check
(1) Perform the inspection using DTC check sheet.
(2) Use SSM3 to read DTC detected on CAN system.
Criteria
: U0073 is output
NO
>System is normal.
YES▼
4.
Control module check
(1) Turn the ignition switch to OFF.
(2) Disconnect the control modules in the proper sequence.
NOTE:
When disconnecting ECM or brake actuator ASSY, connect the resistance of 120 Ω between CAN-Hi and CAN-Lo to substitute a termination resistor.
(3) Turn the ignition switch to ON.
(4) Use SSM3 to read DTC detected on CAN system.
Criteria
: U0073 is no longer displayed
NO
>Repeat Step 4 until U0073 is not detected.
YES▼
Replace the control module which has been removed when no DTC is output.
| DTC | U0100 | Missing data for engine |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: U0100 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
3.
Checking CAN communication circuit
(1) Check CAN communication circuit. (Refer to )
)
Criteria
: No fault is found.
NO
>Follow the repair procedure described in “CAN communication circuit check”.
YES▼
4.
DTC check
(1) Use SSM3 to read DTC.
Criteria
: U0100 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0100 is not detected from more than one module
NO
>Replace the ECM.
YES▼
6.
Replacement of the module
(1) Replace the engine control computer.
(2) Use SSM3 to read DTC.
Criteria
: U0100 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the engine control computer.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0100 is output
NO
>System is normal.
YES▼
Replace the ECM.
| DTC | U0101 | Lost Communication With TCM |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: U0101 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
3.
Checking CAN communication circuit
(1) Check CAN communication circuit. (Refer to )
)
Criteria
: No fault is found.
NO
>Follow the repair procedure described in “CAN communication circuit check”.
YES▼
4.
DTC check
(1) Use SSM3 to read DTC.
Criteria
: U0101 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0101 is not detected from more than one module
NO
>Replace the transmission control computer ASSY.
YES▼
6.
Replacement of the module
(1) Replace the transmission control computer ASSY.
(2) Use SSM3 to read DTC.
Criteria
: U0101 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the transmission control computer ASSY.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0101 is output
NO
>System is normal.
YES▼
Replace the transmission control computer ASSY.
| DTC | U0122 | Missing data for VDC |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: U0122 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
3.
Checking CAN communication circuit
(1) Check CAN communication circuit. (Refer to )
)
Criteria
: No fault is found.
NO
>Follow the repair procedure described in “CAN communication circuit check”.
YES▼
4.
DTC check
(1) Use SSM3 to read DTC.
Criteria
: U0122 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0122 is not detected from more than one module
NO
>Replace the brake actuator ASSY.
YES▼
6.
Replacement of the module
(1) Replace the brake actuator ASSY.
(2) Use SSM3 to read DTC.
Criteria
: U0122 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the brake actuator ASSY.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0122 is output
NO
>System is normal.
YES▼
Replace the brake actuator ASSY.
| DTC | U0126 | Missing data for steering angle sensor |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: U0126 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
3.
Checking CAN communication circuit
(1) Check CAN communication circuit. (Refer to )
)
Criteria
: No fault is found.
NO
>Follow the repair procedure described in “CAN communication circuit check”.
YES▼
4.
DTC check
(1) Use SSM3 to read DTC.
Criteria
: U0126 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0126 is not detected from more than one module
NO
>Replace the spiral cable SUB-ASSY.
YES▼
6.
Replacement of the module
(1) Replace the spiral cable SUB-ASSY.
(2) Use SSM3 to read DTC.
Criteria
: U0126 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the spiral cable SUB-ASSY.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0126 is output
NO
>System is normal.
YES▼
Replace the spiral cable SUB-ASSY.
| DTC | U0131 | Missing data for electric power steering |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: U0131 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
3.
Checking CAN communication circuit
(1) Check CAN communication circuit. (Refer to )
)
Criteria
: No fault is found.
NO
>Follow the repair procedure described in “CAN communication circuit check”.
YES▼
4.
DTC check
(1) Use SSM3 to read DTC.
Criteria
: U0131 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0131 is not detected from more than one module
NO
>Replace the power steering computer ASSY.
YES▼
6.
Replacement of the module
(1) Replace the power steering computer ASSY.
(2) Use SSM3 to read DTC.
Criteria
: U0131 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the power steering computer ASSY.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0131 is output
NO
>System is normal.
YES▼
Replace the power steering computer ASSY.
| DTC | U0140 | Missing data for body integrated unit |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: U0140 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
3.
Checking CAN communication circuit
(1) Check CAN communication circuit. (Refer to )
)
Criteria
: No fault is found.
NO
>Follow the repair procedure described in “CAN communication circuit check”.
YES▼
4.
DTC check
(1) Use SSM3 to read DTC.
Criteria
: U0140 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0140 is not detected from more than one module
NO
>Replace the body integrated unit.
YES▼
6.
Replacement of the module
(1) Replace the body integrated unit.
(2) Use SSM3 to read DTC.
Criteria
: U0140 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the body integrated unit.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0140 is output
NO
>System is normal.
YES▼
Replace the body integrated unit.
| DTC | U0151 | Missing data for air bag |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: U0151 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
3.
Checking CAN communication circuit
(1) Check CAN communication circuit. (Refer to )
)
Criteria
: No fault is found.
NO
>Follow the repair procedure described in “CAN communication circuit check”.
YES▼
4.
DTC check
(1) Use SSM3 to read DTC.
Criteria
: U0151 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0151 is not detected from more than one module
NO
>Replace the airbag CM.
YES▼
6.
Replacement of the module
(1) Replace the airbag CM.
(2) Use SSM3 to read DTC.
Criteria
: U0151 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the airbag CM.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0151 is output
NO
>System is normal.
YES▼
Replace the airbag CM.
| DTC | U0155 | Missing data for meter |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: U0155 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
3.
Checking CAN communication circuit
(1) Check CAN communication circuit. (Refer to )
)
Criteria
: No fault is found.
NO
>Follow the repair procedure described in “CAN communication circuit check”.
YES▼
4.
DTC check
(1) Use SSM3 to read DTC.
Criteria
: U0155 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0155 is not detected from more than one module
NO
>Replace the combination meter ASSY.
YES▼
6.
Replacement of the module
(1) Replace the combination meter ASSY.
(2) Use SSM3 to read DTC.
Criteria
: U0155 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the combination meter ASSY.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0155 is output
NO
>System is normal.
YES▼
Replace the combination meter ASSY.
| DTC | U0164 | Missing data for air conditioner |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: U0164 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
3.
Checking CAN communication circuit
(1) Check CAN communication circuit. (Refer to )
)
Criteria
: No fault is found.
NO
>Follow the repair procedure described in “CAN communication circuit check”.
YES▼
4.
DTC check
(1) Use SSM3 to read DTC.
Criteria
: U0164 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0164 is not detected from more than one module
NO
>Replace A/C control panel.
YES▼
6.
Replacement of the module
(1) Replace A/C control panel.
(2) Use SSM3 to read DTC.
Criteria
: U0164 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Restore A/C control panel.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0164 is output
NO
>System is normal.
YES▼
Replace A/C control panel.
| DTC | U0327 | Missing data for smart key computer ASSY |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: U0327 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
3.
Checking CAN communication circuit
(1) Check CAN communication circuit. (Refer to )
)
Criteria
: No fault is found.
NO
>Follow the repair procedure described in “CAN communication circuit check”.
YES▼
4.
DTC check
(1) Use SSM3 to read DTC.
Criteria
: U0327 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0327 is not detected from more than one module
NO
>Replace the collation ECM (Smart key computer ASSY).
YES▼
6.
Replacement of the module
(1) Replace the collation ECM (Smart key computer ASSY).
(2) Use SSM3 to read DTC.
Criteria
: U0327 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the collation ECM (Smart key computer ASSY).
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0327 is output
NO
>System is normal.
YES▼
Replace the collation ECM (Smart key computer ASSY).
| DTC | U0401 | Data error from engine |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: No DTC indicating bus off or missing data is output
NO
>Perform the diagnosis according to the DTC.
YES▼
3.
DTC check
(1) Check the displayed DTC.
Criteria
: U0401 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
4.
DTC check
(1) Turn the ignition switch to OFF.
(2) Disconnect the engine control computer connector.
(3) Reconnect the disconnected connector and turn the ignition switch ON.
(4) Use SSM3 to read DTC.
Criteria
: U0401 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0401 is not detected from more than one module
NO
>Replace the engine control computer.
YES▼
6.
Replacement of the module
(1) Replace the engine control computer.
(2) Use SSM3 to read DTC.
Criteria
: U0401 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the ECM.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0401 is output
NO
>System is normal.
YES▼
Replace the ECM.
| DTC | U0402 | Data error from transmission |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: No DTC indicating bus off or missing data is output
NO
>Perform the diagnosis according to the DTC.
YES▼
3.
DTC check
(1) Check the displayed DTC.
Criteria
: U0402 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
4.
DTC check
(1) Turn the ignition switch to OFF.
(2) Disconnect the transmission control computer ASSY connector.
(3) Reconnect the disconnected connector and turn the ignition switch ON.
(4) Use SSM3 to read DTC.
Criteria
: U0402 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0402 is not detected from more than one module
NO
>Replace the transmission control computer ASSY.
YES▼
6.
Replacement of the module
(1) Replace the transmission control computer ASSY.
(2) Use SSM3 to read DTC.
Criteria
: U0402 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the transmission control computer ASSY.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0402 is output
NO
>System is normal.
YES▼
Replace the transmission control computer ASSY.
| DTC | U0416 | Data error from VDC |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: No DTC indicating bus off or missing data is output
NO
>Perform the diagnosis according to the DTC.
YES▼
3.
DTC check
(1) Check the displayed DTC.
Criteria
: U0416 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
4.
DTC check
(1) Turn the ignition switch to OFF.
(2) Disconnect the brake actuator ASSY connector.
(3) Reconnect the disconnected connector and turn the ignition switch ON.
(4) Use SSM3 to read DTC.
Criteria
: U0416 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0416 is not detected from more than one module
NO
>Replace the brake actuator ASSY.
YES▼
6.
Replacement of the module
(1) Replace the brake actuator ASSY.
(2) Use SSM3 to read DTC.
Criteria
: U0416 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the brake actuator ASSY.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0416 is output
NO
>System is normal.
YES▼
Replace the brake actuator ASSY.
| DTC | U0420 | Data error from electric power steering |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: No DTC indicating bus off or missing data is output
NO
>Perform the diagnosis according to the DTC.
YES▼
3.
DTC check
(1) Check the displayed DTC.
Criteria
: U0420 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
4.
DTC check
(1) Turn the ignition switch to OFF.
(2) Disconnect the EPS CM connector.
(3) Reconnect the disconnected connector and turn the ignition switch ON.
(4) Use SSM3 to read DTC.
Criteria
: U0420 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0420 is not detected from more than one module
NO
>Replace the EPS CM.
YES▼
6.
Replacement of the module
(1) Replace the EPS CM.
(2) Use SSM3 to read DTC.
Criteria
: U0420 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the EPS CM.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0420 is output
NO
>System is normal.
YES▼
Replace the EPS CM.
| DTC | U0422 | Data error from body integrated unit |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: No DTC indicating bus off or missing data is output
NO
>Perform the diagnosis according to the DTC.
YES▼
3.
DTC check
(1) Check the displayed DTC.
Criteria
: U0422 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
4.
DTC check
(1) Turn the ignition switch to OFF.
(2) Disconnect the body integrated unit connector.
(3) Reconnect the disconnected connector and turn the ignition switch ON.
(4) Use SSM3 to read DTC.
Criteria
: U0422 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0422 is not detected from more than one module
NO
>Replace the body integrated unit.
YES▼
6.
Replacement of the module
(1) Replace the body integrated unit.
(2) Use SSM3 to read DTC.
Criteria
: U0422 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the body integrated unit.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0422 is output
NO
>System is normal.
YES▼
Replace the body integrated unit.
| DTC | U0423 | Data error from meter |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: No DTC indicating bus off or missing data is output
NO
>Perform the diagnosis according to the DTC.
YES▼
3.
DTC check
(1) Check the displayed DTC.
Criteria
: U0423 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
4.
DTC check
(1) Turn the ignition switch to OFF.
(2) Disconnect the combination meter ASSY connector.
(3) Reconnect the disconnected connector and turn the ignition switch ON.
(4) Use SSM3 to read DTC.
Criteria
: U0423 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0423 is not detected from more than one module
NO
>Replace the combination meter ASSY.
YES▼
6.
Replacement of the module
(1) Replace the combination meter ASSY.
(2) Use SSM3 to read DTC.
Criteria
: U0423 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the combination meter ASSY.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0423 is output
NO
>System is normal.
YES▼
Replace the combination meter ASSY.
| DTC | U0424 | Data error from air conditioner |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: No DTC indicating bus off or missing data is output
NO
>Perform the diagnosis according to the DTC.
YES▼
3.
DTC check
(1) Check the displayed DTC.
Criteria
: U0424 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
4.
DTC check
(1) Turn the ignition switch to OFF.
(2) Disconnect the air conditioner amplifier ASSY connector.
(3) Reconnect the disconnected connector and turn the ignition switch ON.
(4) Use SSM3 to read DTC.
Criteria
: U0424 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0424 is not detected from more than one module
NO
>Replace the air conditioner amplifier ASSY.
YES▼
6.
Replacement of the module
(1) Replace the air conditioner amplifier ASSY.
(2) Use SSM3 to read DTC.
Criteria
: U0424 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the air conditioner amplifier ASSY.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0424 is output
NO
>System is normal.
YES▼
Replace the air conditioner amplifier ASSY.
| DTC | U0427 | Data error from smart key computer ASSY |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: No DTC indicating bus off or missing data is output
NO
>Perform the diagnosis according to the DTC.
YES▼
3.
DTC check
(1) Check the displayed DTC.
Criteria
: U0427 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
4.
DTC check
(1) Turn the ignition switch to OFF.
(2) Disconnect the collation ECM (Smart key computer ASSY) connector.
(3) Reconnect the disconnected connector and turn the ignition switch ON.
(4) Use SSM3 to read DTC.
Criteria
: U0427 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0427 is not detected from more than one module
NO
>Replace the collation ECM (Smart key computer ASSY).
YES▼
6.
Replacement of the module
(1) Replace the collation ECM (Smart key computer ASSY).
(2) Use SSM3 to read DTC.
Criteria
: U0427 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the collation ECM (Smart key computer ASSY).
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0427 is output
NO
>System is normal.
YES▼
Replace the collation ECM (Smart key computer ASSY).
| DTC | U0428 | Data error from steering angle sensor |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: No DTC indicating bus off or missing data is output
NO
>Perform the diagnosis according to the DTC.
YES▼
3.
DTC check
(1) Check the displayed DTC.
Criteria
: U0428 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
4.
DTC check
(1) Turn the ignition switch to OFF.
(2) Disconnect the spiral cable SUB-ASSY connector.
(3) Reconnect the disconnected connector and turn the ignition switch ON.
(4) Use SSM3 to read DTC.
Criteria
: U0428 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0428 is not detected from more than one module
NO
>Replace the spiral cable SUB-ASSY.
YES▼
6.
Replacement of the module
(1) Replace the spiral cable SUB-ASSY.
(2) Use SSM3 to read DTC.
Criteria
: U0428 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the spiral cable SUB-ASSY.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0428 is output
NO
>System is normal.
YES▼
Replace the spiral cable SUB-ASSY.
| DTC | U0452 | Data error from air bag |
|---|
Circuit description
Inspection steps
CAUTION:
Perform all of steps to Step 9 in “How to troubleshoot” before performing this steps. (Refer to )
)1.
DTC check
(1) Check the displayed DTC.
Criteria
: DTCs other than U**** are not output
NO
>Perform the diagnosis according to the DTC.
YES▼
2.
DTC check
(1) Check the displayed DTC.
Criteria
: No DTC indicating bus off or missing data is output
NO
>Perform the diagnosis according to the DTC.
YES▼
3.
DTC check
(1) Check the displayed DTC.
Criteria
: U0452 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
4.
DTC check
(1) Turn the ignition switch to OFF.
(2) Disconnect the airbag CM connector.
(3) Reconnect the disconnected connector and turn the ignition switch ON.
(4) Use SSM3 to read DTC.
Criteria
: U0452 is output
NO
>Go to “How to simulate trouble phenomenon” (Refer to)
)YES▼
5.
DTC check
(1) Use SSM3 to read DTCs of all the systems.
Criteria
: U0452 is not detected from more than one module
NO
>Replace the airbag CM.
YES▼
6.
Replacement of the module
(1) Replace the airbag CM.
(2) Use SSM3 to read DTC.
Criteria
: U0452 is output
NO
>System is normal.
YES▼
7.
Replacement of the module
(1) Reinstall the airbag CM.
(2) Replace the module that DTC has been detected.
(3) Use SSM3 to read DTC.
Criteria
: U0452 is output
NO
>System is normal.
YES▼
Replace the airbag CM.
GENERAL DIAGNOSTIC TABLE
1. Inspection
| Item |
Operation |
Status |
Note |
|
|---|---|---|---|---|
| YES |
NO |
|||
| Speedometer |
Displayed vehicle speed is faster or slower than the actual speed. |
Data from the brake actuator ASSY may have been lost. |
System is normal. |
Also, check vehicle speed pulse circuit. |
| Fuel gauge |
Fuel is present, but the fuel level is lower than the actual level. |
Communication error may have occurred. |
System is normal. |
Also, check the fuel gauge. |
| Fuel level warning light |
Fuel is present, but the light illuminates. |
Communication error may have occurred. |
System is normal. |
Also, check the fuel gauge. |
| Engine coolant temperature light |
Engine coolant temperature light blinks in red and blue alternately. |
Communication error may have occurred. |
System is normal. |
Check the engine coolant light system. |
| VDC indicator |
Illuminating. |
Communication error may have occurred. |
System is normal. |
Check if VDC is not operating. |
| VDC OFF indicator |
Illuminating. |
Communication error may have occurred. |
System is normal. |
Check that VDC is not OFF. |
| Brake warning light |
Illuminating. |
Brake fluid may be low or communication error may have occurred. |
System is normal. |
Check the brake system. |
| Shift position |
Not displayed. |
Communication error may have occurred. |
System is normal. |
Also, check AT system. |
| AT temperature light |
Blinking. |
Communication error may have occurred. |
System is normal. |
Also, check AT system. |
| Door indicator |
Does not go on, or does not go off with the doors closed. |
Communication error may have occurred. |
System is normal. |
Also, check the door switch. |
| Clearance indicator |
Not illuminating. |
Communication error may have occurred. |
System is normal. |
Also, check the combination switch. |
| High beam indicator |
Not illuminating. |
Communication error may have occurred. |
System is normal. |
Also, check the combination switch. |
| Front fog indicator |
Not illuminating. |
Communication error may have occurred. |
System is normal. |
Also, check the combination switch. |
| Illumination |
Illuminating at the maximum brightness. |
Communication error may have occurred. |
System is normal. |
Also, check the illumination switch. |