Only Driver Door Lock / Unlock Functions Do Not Operate

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

DESCRIPTION

The front multiplex network door ECU LH receives lock/unlock switch signals and activates the door lock motor according to the signals.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (FRONT DOOR LOCK MOTOR)

(a) Select the ACTIVE TEST, use the Techstream to generate a condition command, and then check that the door lock motor operates.

Front Multiplex Network Door ECU LH:

OK:

Door locks/unlocks.

NG -- INSPECT FRONT DOOR LOCK ASSEMBLY LH

OK -- REPLACE FRONT MULTIPLEX NETWORK DOOR ECU LH

2. INSPECT FRONT DOOR LOCK ASSEMBLY LH

(a) Apply battery voltage to the door lock motor and check operation of the door lock motor.

OK:

NG -- REPLACE FRONT DOOR LOCK ASSEMBLY LH
OK -- Continue to next step.

3. READ VALUE USING TECHSTREAM (DOOR LOCK POSITION SWITCH)

(a) Check the DATA LIST for proper functioning of the door lock position switch.

Multiplex Network Master Switch Assembly:

OK:

ON (driver side door is unlocked) appears on screen.

NG -- INSPECT FRONT DOOR LOCK ASSEMBLY LH (DOOR LOCK POSITION SWITCH)

OK -- REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY)

4. INSPECT FRONT DOOR LOCK ASSEMBLY LH (DOOR LOCK POSITION SWITCH)

(a) Measure the resistance of the switch.

Standard resistance:

NG -- REPLACE FRONT DOOR LOCK ASSEMBLY LH
OK -- Continue to next step.

5. CHECK WIRE HARNESS (DRIVER DOOR ECU - FRONT DOOR LOCK ASSEMBLY LH)

(a) Disconnect the M10 ECU connector.

(b) Disconnect the M12 door lock 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.

6. CHECK WIRE HARNESS (FRONT DOOR LOCK ASSEMBLY - MULTIPLEX NETWORK MASTER SWITCH)

(a) Disconnect the M12 door lock connector.

(b) Disconnect the Q13 switch connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:

NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR

OK -- REPLACE FRONT MULTIPLEX NETWORK DOOR ECU LH