Trunk opener system
Parts location System information Troubleshooting Circuit diagnosis Removal / installation Other
DOOR / TRUNK
TRUNK OPENER SYSTEM
FUNCTION INSPECTION
1. Function inspection of the trunk opener
(1) When the vehicle meets all the following conditions, after operating the trunk opening switch ASSY, check that the trunk becomes unlatched (partially opens).
(a) IG OFF
(b) In IG ON status, the vehicle's speed is 3 km or less or the shift is in the P position.
(c) The auto alarm is not in caution or warning status.*
*: When there is an auto alarm system
(d) The trunk open cancel switch is not in cancel status.
PARTS LOCATION
SYSTEM DIAGRAM
DESCRIPTION OF FUNCTIONS
1. Description of the trunk opener system
(1) The trunk opener is an electric type.
(2) When it receives the ON signal from the trunk opening switch ASSY, the main body ECM (multiplex network body computer) operates the trunk lock motor.
2. Functions of the main parts
| Component |
Function |
|---|---|
| KEY lock trunk |
Controlled by the main body ECM (multiplex network body computer), it releases the trunk lock. |
| Trunk opening switch ASSY |
When the trunk opening switch is pressed in, the opening switch ON signal is sent to the main body ECM (multiplex network body computer). |
| Main body ECM (multiplex network body ECM) |
When the trunk opening switch is pressed in, the main body ECM (multiplex network body computer) receives the opening switch ON signal. When the trunk opening cancel switch is pressed in, the main body ECM (multiplex network body computer) receives the opening cancel switch ON signal. |
SYMPTOM TABLE
NOTE:
·Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
·Inspect the fuses and relays related to this system before inspecting the suspected areas below.
·Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Trunk Opener System
| Symptom |
See page |
|---|---|
| Trunk opener does not operate |
 |
HOW TO TROUBLESHOOT
NOTE:
Use the following procedure to troubleshoot the trunk opener system.
1.
Bring in the car
Next▼
2.
Interview and phenomenon check
NOTE:
Refer to .
.Next▼
3.
Communication function inspection of the CAN communication system
(1) Check CAN communication system. (Refer to )
)
Result
| Result |
Go to |
|---|---|
| If the CAN communication system is functioning properly, [there is no "CAN communication error, ECM communication error / lost communication" diagnostic code output.] |
A |
| If the CAN communication system is not functioning properly, [there is a "CAN communication error, ECM communication error / lost communication" diagnostic code output.] |
B |
B
>See the CAN communication system troubleshooting flowchart
A▼
4.
Check vehicle status
(1) Check whether the auto alarm system is installed.
Result
| Result |
Go to |
|---|---|
| If there is an auto alarm system |
A |
| If there is no auto alarm system |
B |
B
>Go to Step 5.
A▼
5.
Symptom table
NOTE:
Refer to .
.Result
| Result |
Go to |
|---|---|
| Not applicable to the symptom table. |
A |
| Applicable to the symptom table. |
B |
B
>Go to Step 6.
A▼
6.
Based on the trouble phenomenon, perform troubleshooting with the following steps.
(1) [Current Data Display & Save] / [System Operation Check Mode] (Refer to )
)
(a) Inspection with SSM3 [Current Data Display & Save]
(b) Inspection with SSM3 [System Operation Check Mode]
(2) ECM terminal matrix (Refer to )
)(3) Unit inspection
Next▼
7.
Adjustment, repair, or replacement
Next▼
Complete
CHECK LIST FOR INTERVIEW
ECM TERMINAL ARRANGEMENT
1. Main body ECM (network gateway computer), instrument panel junction block ASSY
(1) Inspection of the main body ECM (network gateway computer), instrument panel junction block ASSY
Captions in illustration
| *1 |
Instrument panel junction block ASSY |
*2 |
Main body ECM (Network gateway computer) |
(a) Remove the main body ECM (network gateway computer) from the instrument panel junction block ASSY.
(b) Measure the voltage and resistance between terminals.
Standard value
| Terminal No. (Terminal symbol) |
Inspection conditions |
Standard value |
|---|---|---|
| MB-1 (BECU) ←→ chassis ground |
Always |
11 to 14 V |
| MB-8 (IG) ←→ chassis ground |
IG OFF → IG ON |
Less than 1 V → 11 to 14 V |
| MB-9 (ACC) ←→ chassis ground |
IG OFF → ACC ON |
Less than 1 V → 11 to 14 V |
| MB-11 (GND) ←→ chassis ground |
Always |
Less than 1 Ω |
| D5-22 (ACC) ←→ chassis ground* |
IG OFF → ACC ON |
Less than 1 V → 11 to 14 V |
| D6-16 (TSW) ←→ chassis ground |
Trunk opening switch ASSY OFF → ON |
10 kΩ or more → less than 1 Ω |
*: When there is a smart entry & start system
NOTE:
If it is outside the standard values, the vehicle is defective.
(c) Install the main body ECM (network gateway computer) on the instrument panel junction block ASSY.
(d) Measure the voltage between the terminals.
Standard value
| Terminal No. (Terminal symbol) |
Inspection conditions |
Standard value |
|---|---|---|
| D6-16 (TSW) ←→ chassis ground |
Trunk opening switch ASSY OFF → ON |
Pulse generation → less than 1 V |
| 3B-6 ←→ chassis ground |
Trunk opening switch ASSY OFF → ON |
Less than 1 V → 11 to 14 V → less than 1 V |
NOTE:
If it is outside the standard values, the main body ECM (network gateway computer) is defective.
CURRENT DATA DISPLAY & SAVE / SYSTEM OPERATION CHECK MODE
1. Inspection with SSM3
(1) Current Data Display & Save
(a) Use the SSM3 and the [Current Data Display & Save] to determine functionality and narrow down the defective part.
Criteria
SSM3 screen: [Each System Check]→ [Integ. unit mode]→ [Current Data Display & Save]
| Item Name |
Description/display range |
Normal value |
Remarks |
|---|---|---|---|
| [Trunk/BDoor Open SW] |
Trunk opening switch ASSY (trunk open switch) status Display range: [ON] - [OFF] |
[ON]: the switch is pressed in [OFF]: the switch is not pressed in |
- |
(2) [System Operation Check Mode]
| Trunk opener does not operate. |
|---|
Circuit description
The main body ECM (network gateway computer) receives a switch signal from the trunk opening switch ASSY, then starts the trunk lock ASSY motor and opens the trunk. (For operation conditions, refer to the function inspection )
)Circuit figure
Inspection steps
CAUTION:
The trunk opener system uses the CAN communication system. First, perform a “Communication function inspection”, following “How to troubleshoot (Refer to )”, and after checking for any malfunction in the communication system, you can proceed with troubleshooting.
)”, and after checking for any malfunction in the communication system, you can proceed with troubleshooting.1.
Performance of the SSM3 [System Operation Check Mode]
NG
> Go to Step 5.
OK▼
2.
SSM3 [Current Data Display & Save] (trunk opening switch ASSY)
(1) [Current Data Display & Save]
(a) Using the SSM3, check the data monitor of the main body ECM (network gateway computer). (Refer to )
)
Criteria
SSM3 screen: [Each System Check]→ [Integ. unit mode]→ [Current Data Display & Save]
| Tester display |
Measurement items / range |
Normal condition |
Notes for diagnosis |
|---|---|---|---|
| [Trunk and Back-Door SW] |
Trunk opening switch signal / [ON or OFF] |
[ON]: The trunk opening switch ASSY is pressed in. [OFF]: The trunk opening switch ASSY is not pressed in. |
- |
B
> Go to Step 3.
A▼
Replacement of the main body ECM (multiplex network body ECM)
3.
Unit inspection of the trunk opening switch ASSY (trunk open switch)
(1) Remove the trunk opening switch ASSY (trunk open switch). (Refer to )
)(2) Perform the unit inspection of the trunk opening switch ASSY (trunk open switch). (Refer to )
)NG
>Replacement of the trunk opening switch ASSY (trunk open switch) (Refer to )
)OK▼
4.
Inspection of the wiring harnesses and the connectors (main body ECM - trunk opening switch ASSY)
(1) Disconnect the main body ECM (network gateway computer) connector D6 and the trunk opening switch ASSY connector D4.
NG
>Repair or replacement of wiring harness or connector
OK▼
Replacement of the main body ECM (multiplex network body ECM) (Refer to )
)5.
Unit inspection for the trunk lock ASSY
(1) Remove the trunk lock ASSY. (Refer to )
)(2) Perform the unit inspection of the trunk lock ASSY. (Refer to )
)NG
>Replacement of the trunk lock ASSY (Refer to )
)OK▼
6.
Inspection of the wiring harnesses and the connectors (instrument panel junction block ASSY - trunk lock ASSY)
(1) Disconnect the instrument panel junction block ASSY connector (3B) and the trunk lock ASSY connector (J3).
NG
>Repair or replacement of wiring harness or connector
OK▼
7.
Unit inspection of the instrument panel junction block ASSY.
(1) Remove the instrument panel junction block ASSY. (Refer to )
)(2) Remove the main body ECM (network gateway computer) from the instrument panel junction block ASSY.
(3) Measure the resistance between the terminals.
Captions in illustration
| *a |
Connector not connected (Instrument panel junction block ASSY connector) |
- |
- |
NG
>Replacement of the instrument panel junction block ASSY (Refer to )
)OK▼
Replacement of the main body ECM (network gateway computer) (Refer to )
)