Only Back Door Lock / Unlock Functions Do Not Operate

DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: Only Back Door LOCK / UNLOCK Functions do not Operate

Only Back Door LOCK / UNLOCK Functions do not Operate

DESCRIPTION

The driver side junction block (main body ECU) receives switch signals from the power window regulator master switch and activates the luggage compartment door lock motor according to the signals.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (BACK DOOR OPENER SWITCH AND BACK DOOR)
(a) Check the Data List for proper functioning of back door opener switch.
Main Body ECU:






OK:
ON (Back door opener switch is pushed) appears on the screen.
(b) Check the Data List for proper functioning of the back door open judgment.
Main Body ECU:






OK:
PERMIT (Back door can be opened) appears on the screen.
Result:






C -- INSPECT BACK DOOR LOCK (COURTESY SWITCH)
B -- INSPECT BACK DOOR LOCK (DOOR LOCK MOTOR)
A -- Continue to next step.

2. INSPECT BACK DOOR LOCK




(a) Remove the back door opener switch.
(b) Measure the resistance of the switch.
Standard resistance:






NG -- REPLACE BACK DOOR OPENER SWITCH
OK -- Continue to next step.

3. CHECK WIRE HARNESS (SWITCH - ECU AND BODY GROUND)




(a) Disconnect the L4 switch connector.
(b) Disconnect the B7 ECU connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

4. INSPECT BACK DOOR LOCK (DOOR LOCK MOTOR)




(a) Check operation of the back door lock.
(1) Using a screwdriver, move the latch to the full-latch position.
(2) Apply battery voltage to the door lock and check operation the latch.
OK:






NG -- REPLACE BACK DOOR LOCK
OK -- Continue to next step.

5. INSPECT BACK DOOR LOCK (COURTESY SWITCH)




(a) Measure the resistance of the switch.
Standard resistance:






NG -- REPLACE BACK DOOR LOCK
OK -- Continue to next step.

6. CHECK WIRE HARNESS (MOTOR - DRIVE SIDE JUNCTION BLOCK, ECU AND BODY GROUND)




(a) Disconnect the L3 lock connector.
(b) Disconnect the B7 ECU connector.
(c) Disconnect the 1D junction block connector.
(d) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE DRIVER SIDE JUNCTION BLOCK