Power door lock control system
Parts location System information Troubleshooting Circuit diagnosis Removal / installation
DOOR LOCK
POWER DOOR LOCK CONTROL SYSTEM
PARTS LOCATION
SYSTEM DIAGRAM
DESCRIPTION OF FUNCTIONS
1. Description of power door lock control system
(1) The power door lock control system locks and unlocks all doors. The main body ECM (multiplex network body computer) detects lock and unlock signals from the door control switches. Then, the main body ECM (multiplex network body computer) sends a lock or unlock signal to each door lock motor in response to the input.
2. Functions of the main parts
*1: With passenger’s door control switch
*2: For LHD
*3: For RHD
*4: For vehicles with entry & start system
| Components |
Function |
|---|---|
| Power window regulator master switch ASSY ·Door control switch |
The door control switch in the master switch locks and unlocks all doors. |
| Power window regulator switch ASSY ·Door control switch *1 |
The passenger’s door control switch locks and unlocks all doors. |
| Door courtesy light ASSY |
·It is provided for each door. ·It detects the door state (open, close) and outputs the data to the main body ECM (multiplex network body computer). ·It illuminates while the door is open and turns off while the door is closed. |
| Front door lock ASSY LH*2 Front door lock ASSY RH*3 |
·An integrated motor locks and unlocks the door. ·The integrated key lock/unlock switch (linked by key) detects the key operation state and outputs the signal to the main body ECM (multiplex network body computer). ·The integrated unlock detection switch (locked or unlocked) detects the door state and outputs the signal to the main body ECM (multiplex network body computer). This switch turns OFF when the door is locked or turns ON when the door is unlocked. |
| Front door lock ASSY RH*2 Front door lock ASSY LH*3 |
·An integrated motor locks and unlocks the door. ·The integrated unlock detection switch (locked or unlocked) detects the door state and outputs the signal to the main body ECM (multiplex network body computer). This switch turns OFF when the door is locked or turns ON when the door is unlocked. *4 |
| Trunk lock ASSY |
·An integrated motor releases the door latch. ·The integrated courtesy switch (open or closed) detects the trunk state and outputs the signal to the main body ECM (multiplex network body computer). ·This switch turns ON when the trunk is open and turns OFF when it is closed. |
*2: For LHD
*3: For RHD
*4: For vehicles with entry & start system
3. System functions
(1) This system is controlled by the main body ECM (multiplex network body computer). The main body ECM (multiplex network body computer) outputs signals to the door lock motors. The power door lock control system provides the following functions.
*1: With key link switch
*2: With entry & start system
*3: Without entry & start system
*4: A double locking system is included.
*5: Because this function is set to OFF in the vehicle initial state, it should be set by the customize function.
| Function |
Procedures |
|---|---|
| Manual lock&unlock function |
This function allows the user to lock and unlock all doors by activating the door control switches. |
| Key link lock&unlock function *1 |
This function is linked with the mechanical key cylinders and locks or unlocks all doors when a lock or unlock operation is performed. |
| Lockout prevention function |
If a key remains in the vehicle *2 or it is left inserted in the ignition key cylinder *3, the doors are not locked even when a door lock operation is performed. |
| Manual unlock prevention function |
Under the following conditions, any door unlock operation with a door control switch is prevented. ·The doors are locked by key link operation *1, wireless key operation *3, or entry operation while all doors are closed. |
| Double lock function *4 |
This prevents doors from being unlocked with an inside/outside door handle. |
| Key link 2 step unlock function *1, *5 |
Turning the key cylinder once unlocks the driver’s door only. Turning it twice unlocks all the doors. |
*2: With entry & start system
*3: Without entry & start system
*4: A double locking system is included.
*5: Because this function is set to OFF in the vehicle initial state, it should be set by the customize function.
HOW TO PROCEED WITH TROUBLESHOOTING
NOTE:
·Use the following procedures to troubleshoot the power door lock control system.
·*: Use the SSM3.
·*: Use the SSM3.
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT▼
2.
INSPECT BATTERY VOLTAGE
Standard voltage
: 11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
NEXT▼
3.
PROBLEM SYMPTOMS TABLE
(1) Refer to Problem Symptoms Table (See page 
).
).Result
| Result |
Proceed to |
|---|---|
| Fault is not listed in Problem Symptoms Table |
A |
| Fault is listed in Problem Symptoms Table |
B |
B
>Go to step 5
A▼
4.
OVERALL ANALYSIS AND TROUBLESHOOTING*
(1) Terminals of ECU (See page ).
).(2) Operation check (See page ).
).(3) Data List/Active Test (See page ).
).NEXT▼
5.
ADJUST, REPAIR OR REPLACE
NEXT▼
6.
CONFIRMATION TEST
NEXT▼
END
OPERATION CHECK
1. Check the power door lock operation.
CAUTION:
The following operation check is based on the vehicle initial state that is not customized yet.
(1) Inspect the basic functions.
(a) Check that all doors are locked when the lock side of the door control switch is pressed.
(b) Check that all doors are unlocked when the unlock side of the door control switch is pressed.
(c) Check that all doors are locked when the driver’s door key cylinder is turned to the lock side using a key.
(d) Check that all doors are unlocked when the driver’s door key cylinder is turned to the unlock side using a key.
(2) Checking lockout prevention function (with entry & start system)
CAUTION:
To prevent the electronic key from being left inside the vehicle inadvertently, perform the following checks with the driver side window opened.
(a) Place an electronic key inside the vehicle.
(b) With the driver’s door opened, set the driver’s door lock knob or door control switch to the lock state and close the driver’s. Check that all doors are unlocked.
(3) Checking lockout prevention function (without entry & start system)
CAUTION:
To prevent the key from being left inside the vehicle inadvertently, perform the following checks with the driver side window opened.
(a) Turn the ignition switch to ON or ACC.
(b) Check that all doors are unlocked immediately when door control switch (for manual operation) is operated to the lock side with the driver’s door opened.
(4) Checking security function of door lock control system
(a) Open the driver’s door window before closing all doors so that the door control switches can be operated even from outside. (Step 1)
(b) Starting from the step 1, lock the driver’s door using a key from outside. Next, check that the doors are not unlocked when the unlock side of the door control switch (for manual operation) is operated from outside.
(c) (With double locking system) Starting from the step 1, lock the drivers door by wireless key operation or entry lock operation *1 from outside. Next, check that the doors are not unlocked when the unlock side of the door control switch (for manual operation) is operated from outside.
*1: With entry & start system
*1: With entry & start system
NOTE:
Check that the security function of the door lock control system is cancelled under the following conditions.
·Turn the ignition switch to ON.
·The driver’s door is unlocked using an actual key.
·After the door lock knob is unlocked manually, the unlock side of the door control switch (for manual operation) is pressed.
·The door is unlocked by wireless operation.
·The door is unlocked by entry operation.
·The driver’s door is unlocked using an actual key.
·After the door lock knob is unlocked manually, the unlock side of the door control switch (for manual operation) is pressed.
·The door is unlocked by wireless operation.
·The door is unlocked by entry operation.
SYMPTOM TABLE
NOTE:
·Use the following table to identify the cause of the symptom. If multiple areas are listed as the causes, they are indicated in the [Faulty part] column according to the order of probability of causing the symptom. Check the possible causal areas in the list order and confirm each symptom. Replace faulty parts as necessary.
·Before inspecting the areas listed in “Possible cause” below, check the fuses and the relays related to this system.
·Before inspecting the areas listed in “Possible cause” below, check the fuses and the relays related to this system.
Power door lock control system
| Symptoms |
Faulty part |
Reference pages |
|---|---|---|
| All door lock/unlock function does not operate |
Main body ECM (multiplex network body ECM) |
- |
| Instrument panel junction block ASSY |
- |
|
| All door lock/unlock function does not operate with master switch or door key cylinders |
Power window regulator master switch ASSY |
|
| Wiring harness or connector |
- |
|
| Main body ECM (multiplex network body ECM) |
- |
|
| Instrument panel junction block ASSY |
- |
|
| Only all door lock/unlock function does not operate |
Front door lock ASSY (for driver’s door) |
- |
| Wiring harness or connector |
- |
|
| Main body ECM (multiplex network body ECM) |
- |
|
| Instrument panel junction block ASSY |
- |
|
| Only passenger’s door lock/unlock function does not operate |
Front door lock ASSY (for front passenger’s door) |
- |
| Wiring harness or connector |
- |
|
| Main body ECM (multiplex network body ECM) |
- |
|
| Instrument panel junction block ASSY |
- |
|
| Double lock function does not operate normally *1 |
Front door lock ASSY (for driver’s door) |
- |
| Front door lock ASSY (for front passenger’s door) |
- |
|
| Wiring harness or connector |
- |
|
| Main body ECM (multiplex network body ECM) |
- |
|
| Instrument panel junction block ASSY |
- |
NOTE:
*1: A double locking system is included.
ECM TERMINAL ARRANGEMENT
1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
Text in Illustration
| *1 |
Instrument Panel Junction Block Assembly |
*2 |
Main Body ECU (Multiplex Network Body ECU) |
(1) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
(2) Disconnect the D5, D6 and A73 main body ECU (multiplex network body ECU) connectors.
(3) Measure the resistance and voltage between each terminal of the wire harness side connectors and body ground.
| Terminal No. |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
| MB-1 - Body ground |
Battery power supply |
Always |
11 to 14 V |
| MB-8 - Body ground |
Ignition switch power supply |
Ignition switch ON |
11 to 14 V |
| Ignition switch off |
Below 1 V |
||
| MB-9 - Body ground |
ACC power supply |
Ignition switch ACC |
11 to 14 V |
| Ignition switch off |
Below 1 V |
||
| MB-11 - Body ground |
Ground |
Always |
Below 1 Ω |
| MB-32 - Body ground |
Battery power supply |
Always |
11 to 14 V |
| D5-22 - Body ground |
Unlock warning switch input |
No key in ignition key cylinder (off) |
Below 1 V |
| Key inserted ignition key cylinder (on) |
11 to 14 V |
||
| D6-1 - Body ground |
Ground |
Always |
Below 1 Ω |
| A73-4 - Body ground |
Ground |
Always |
Below 1 Ω |
(4) Reconnect the D5, D6 and A73 main body ECU (multiplex network body ECU) connectors.
(5) Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.
(6) Measure the voltage and resistance, check for pulse according to the valve(s) in the table below.
| Terminal No. |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
| 3A-28 - Body ground |
Driver side door courtesy light switch input |
Driver side door open |
Below 1 V |
| Driver side door closed |
Pulse generation |
||
| 3B-13 - Body ground |
Passenger side door courtesy light switch input |
Passenger side door open |
Below 1 V |
| Passenger side door closed |
Pulse generation |
||
| 3B-2 - Body ground |
Door lock motor lock drive output (for driver side) |
Door control switch not pushed |
Below 1 V |
| Lock side of door control switch pushed |
11 to 14 V |
||
| 3B-3 - Body ground |
Door lock motor lock drive output (for passenger side) |
Door control switch not pushed |
Below 1 V |
| Lock side of door control switch pushed |
11 to 14 V |
||
| 3B-1 - Body ground |
Door lock motor unlock drive output (for driver side) |
Door control switch not pushed |
Below 1 V |
| Lock side of door control switch pushed |
11 to 14 V |
||
| 3B-4 - Body ground |
Door lock motor unlock drive output (for passenger side) |
Door control switch not pushed |
Below 1 V |
| Lock side of door control switch pushed |
11 to 14 V |
||
| 3D-26 - Body ground |
Luggage compartment door courtesy light switch input |
Door control switch not pushed |
Below 1 V |
| Lock side of door control switch pushed |
11 to 14 V |
CURRENT DATA DISPLAY & SAVE / SYSTEM OPERATION CHECK MODE
1. Current Data Display & Save
CAUTION:
The values indicated for the normal conditions are informative values. Do not depend on reference value only when judging if the part is faulty.
NOTE:
By reading [Current Data Display & Save] on SSM3, you can check the values and status of switches, sensors, actuators and other items without removing any parts. This inspection is very useful because it allows an operator to read any intermittent conditions or signals without disturbing parts or wiring. By reading the current data display & save information at an initial phase of troubleshooting, you can save time for diagnosis.
(1) Connect the SSM3 to the DLC3.
(2) Turn the ignition switch to ON.
(3) Turn on the SSM3.
(4) Enter the following menu items: [Integ. unit mode] → [Current Data Display & Save].
(5) Based on the display contents of SSM3, read the current data display & save.
Main body
| Item Name |
Description/display range |
Normal value |
Remarks |
|---|---|---|---|
| [D Door Courtesy] |
Driver’s door courtesy light switch signal / ON or OFF |
ON: Driver’s door is closed OFF: Driver’s door is open |
- |
| [Door Lock SW-Lock] |
Door control switch (power window regulator master switch ASSY or power window regulator switch ASSY *1) lock signal / OFF or ON |
OFF: Lock side of door control switch (power window regulator master switch ASSY or power window regulator switch ASSY *1) is not pressed ON: Lock side of door control switch (power window regulator master switch ASSY or power window regulator switch ASSY *1) is pressed |
- |
| [Door Lock SW-Unlock] |
Door control switch (power window regulator master switch ASSY or power window regulator switch ASSY *1) unlock signal / OFF or ON |
OFF: Unlock side of door control switch (power window regulator master switch ASSY or power window regulator switch ASSY *1) is not pressed ON: Unlock side of door control switch (power window regulator master switch ASSY or power window regulator switch ASSY *1) is pressed |
- |
| [P Door Courtesy] |
Passenger’s door courtesy light switch signal / ON or OFF |
ON: Passenger’s door is closed OFF: Passenger’s door is open |
- |
| [Luggage Courtesy SW] |
Trunk courtesy switch signal / OFF or ON |
OFF: Trunk is closed ON: Trunk is open |
- |
| [Ignition] |
Ignition switch state / OFF or ON |
FF: IG SW OFF ON:IG SW ON |
- |
| [ACC SW] |
Ignition switch state / OFF or ON |
OFF:IG SW OFF ON: Ignition switch ON (ACC) |
- |
| [Key Unlock Warning SW] |
Unlock warning switch signal / OFF or ON |
OFF: Key is not inserted in ignition key cylinder ON: Key is inserted in ignition key cylinder |
- |
·*1: With passenger’s door control switch
2. System Operation Check Mode
NOTE:
By performing active tests with SSM3, you can operate relays, VSV, actuators and other devices without removing any parts. This functional inspection method is very useful because it helps check state-related signals and identify the faulty part without removing any parts and wiring. By performing active tests at an initial phase of troubleshooting, you can save time for diagnosis. The current data display & save information can be displayed during system operation check mode.
(1) Connect the SSM3 to the DLC3.
(2) Turn the ignition switch to ON.
(3) Turn on the SSM3.
(4) Enter the following menu items: [Integ. unit mode] → [Work Support] → [System Operation Check Mode].
| All door lock/unlock function does not operate with door control switches or door key cylinders |
|---|
Circuit description
The main body ECM (multiplex network body computer) detects signals from the door control switches and driver’s door key cylinder switch, and actuate the door lock motor of each door.
Circuit figure
Inspection steps
1.
Door lock operation check
(1) Proceed to a next step according to the symptoms listed in the table below.
Result
| Result |
Go to |
|---|---|
| Doors can not be locked via the power window regulator master switch ASSY |
A |
| Doors can not be locked via the power window regulator master switch ASSY *1 |
B |
| Doors cannot be locked via the driver’s door key cylinder *2 (with double locking system) |
C |
·*1: With passenger’s door control switch
·*2: With key link switch
·*2: With key link switch
B
>Go to Step 6.
C
>Go to Step 10.
A▼
2.
Reading values with SSM3 (door lock SW - lock & door lock SW - unlock)
(1) Connect the SSM3 to the DLC3.
(2) Turn the ignition switch to ON.
(3) Turn on the SSM3.
(4) Enter the following menu items: [Integ. unit mode] → [Current Data Display & Save].
(5) Based on the display contents of SSM3, read the current data display & save.
Main body
| Item Name |
Description/display range |
Normal value |
Remarks |
|---|---|---|---|
| [Door Lock SW-Lock] |
Door control switch (power window regulator master switch ASSY) lock signal / OFF or ON |
OFF: Lock side of door control switch (power window regulator master switch ASSY) is not pressed ON: Lock side of door control switch (power window regulator master switch ASSY) is pressed |
- |
| [Door Lock SW-Unlock] |
Door control switch (power window regulator master switch ASSY) unlock signal / OFF or ON |
OFF: Unlock side of door control switch (power window regulator master switch ASSY) is not pressed ON: Unlock side of door control switch (power window regulator master switch ASSY) is pressed |
- |
Criteria
: While the switch is operating, SSM3 displays the contents as indicated in the table
NG
>Go to Step 3.
OK▼
Replacement of the main body ECM (multiplex network body ECM)
3.
Inspect the power window regulator master switch ASSY
(1) Remove the power window regulator master switch ASSY
(2) Measure the resistance according to the following table.
Normal resistance (for RHD)
| Tester connection |
Switch conditions |
Specified condition |
|---|---|---|
| F6-16 - E8-5 |
Lock switch is pressed |
1 Ω or less |
| off |
10 kΩ or more |
|
| F6-15 - E8-5 |
Unlock switch is pressed |
1 Ω or less |
| off |
10 kΩ or more |
Captions in illustration
| *A |
For LHD |
| *B |
For RHD |
| *a |
Connector not connected (Power window regulator master switch ASSY (door control switch)) |
NG
>Replacement of power window regulator master switch ASSY
OK▼
4.
Inspect the wiring harnesses and connectors (power window regulator master switch - junction block and chassis ground)
(1) For LHD:
(a) Remove the 3A connector of the instrument panel junction block ASSY.
(b) Remove the E8 power window regulator master switch ASSY (door control switch) connector.
(c) Measure the resistance according to the following table.
(2) For RHD:
(a) Remove the 3A connector of the instrument panel junction block ASSY.
(b) Remove the F6 power window regulator master switch ASSY (door control switch) connector.
(c) Measure the resistance according to the following table.
NG
>Repair or replacement of wiring harness or connector
OK▼
5.
Inspect the instrument panel junction block ASSY unit.
(1) Remove the instrument panel junction block ASSY.
NG
>Replacement of the instrument panel junction block ASSY
OK▼
Replacement of the main body ECM (multiplex network body ECM)
6.
Reading values with SSM3 (door lock SW - lock & door lock SW - unlock)
(1) Connect the SSM3 to the DLC3.
(2) Turn the ignition switch to ON.
(3) Turn on the SSM3.
(4) Enter the following menu items: [Integ. unit mode] → [Current Data Display & Save].
(5) Based on the display contents of SSM3, read the current data display & save.
Main body
| Item Name |
Description/display range |
Normal value |
Remarks |
|---|---|---|---|
| [Door Lock SW-Lock] |
Door control switch (power window regulator switch ASSY) lock signal / OFF or ON |
OFF: Lock side of door control switch (power window regulator switch ASSY) is not pressed OFF: Lock side of door control switch (power window regulator switch ASSY) is pressed |
- |
| [Door Lock SW-Unlock] |
Door control switch (power window regulator switch ASSY) unlock signal / OFF or ON |
OFF: Unlock side of door control switch (power window regulator switch ASSY) is not pressed OFF: Unlock side of door control switch (power window regulator switch ASSY) is pressed |
- |
Criteria
: While the switch is operating, SSM3 displays the contents as indicated in the table
NG
>Go to Step 7.
OK▼
Replacement of the main body ECM (multiplex network body ECM)
7.
Inspect the power window switch
(1) Remove the power window regulator switch ASSY.
(2) Measure the resistance according to the following table.
Captions in illustration
| *a |
Connector not connected (Power window regulator master switch ASSY (door control switch)) |
NG
>Replace the power window switch
OK▼
8.
Inspect the wiring harnesses and connectors (power window switch - junction block and chassis ground)
(1) Remove the 3A and 3B instrument panel junction block ASSY connectors.
(2) Remove the F6 power window regulator switch ASSY connector.
(3) Measure the resistance according to the following table.
NG
>Repair or replacement of wiring harness or connector
OK▼
9.
Inspect the instrument panel junction block ASSY unit.
(1) Remove the instrument panel junction block ASSY.
NG
>Replacement of instrument panel junction block ASSY
OK▼
Replacement of the main body ECM (multiplex network body ECM)
10.
Reading values with SSM3 (door key link lock & unlock switch)
(1) Connect the SSM3 to the DLC3.
(2) Turn the ignition switch to ON.
(3) Turn on the SSM3.
(4) Enter the following menu items: [Integ. unit mode] → [Current Data Display & Save].
(5) Based on the display contents of SSM3, read the current data display & save.
Main body
| Item Name |
Description/display range |
Normal value |
Remarks |
|---|---|---|---|
| [Door Key SW-Lock] |
Door key link lock switch signal / ON or OFF |
ON: Driver’s door key cylinder is in locked position. OFF: Driver’s door key cylinder is in unlocked position. |
- |
| [Door Key SW-Unlock] |
Door key link unlock switch signal / ON or OFF |
ON: Driver’s door key cylinder is in unlocked position. OFF: Driver’s door key cylinder is in locked position. |
- |
Criteria
: [ON] (driver’s door key cylinder is locked/unlocked) is displayed on the confirmation screen
NG
>Go to Step 11.
OK▼
Replacement of the main body ECM (multiplex network body ECM)
11.
Inspect the front door lock assembly
(1) Remove the front door lock ASSY.
(2) Inspect the front door lock ASSY.
NG
>Replace the front door lock assembly
OK▼
12.
Check the harnesses and connectors (main body ECM - front door lock & chassis ground)
(1) Disconnect the connector D5 of the main body ECM (multiplex network body computer).
(2) Remove the F3 front door lock ASSY RH connector.
(3) Measure the resistance according to the following table.
NG
>Repair or replacement of wiring harness or connector
OK▼
Replacement of the main body ECM (multiplex network body ECM)