DOOR LOCK DOES NOT OPERATE [SECURITY AND LOCKS]


id0903k7012400

Description
•  Door cannot be locked/unlocked using the front door key cylinder.
•  All doors cannot be locked/unlocked using the driver's door lock knob.
Possible Causes
•  Door latch switch malfunction
•  Door lock actuator malfunction
•  Front door key cylinder switch malfunction
•  Open circuit in wiring harness between the following terminals:
―  Front door latch and lock actuator terminal H (L.H.D.)/F (R.H.D.) and BCM terminal 2L
―  Electrical supply unit (ESU) terminal 1B and front door latch and lock actuator (RH) terminal E
―  Electrical supply unit (ESU) terminal 1B and front door latch and lock actuator (LH) terminal G
―  Electrical supply unit (ESU) terminal 1C and front door latch and lock actuator (RH) terminal K
―  Electrical supply unit (ESU) terminal 1C and front door latch and lock actuator (LH) terminal A


Diagnostic Procedure

Step

Inspection

Action

1
INSPECT DOOR LATCH SWITCH STUCK OFF OR OPEN CIRCUIT
•  Open each door and verify that the door ajar warning light in the instrument cluster illuminates.
•  Does the door ajar warning light illuminate?
Yes
Go to the next step.
No
•  Inspect the door latch switch on the door in which the ajar warning light did not illuminate and for an open circuit in the wiring harness between the BCM and ground.
•  After inspection, go to Step 5.
2
DETERMINE IF MALFUNCTION CAUSE IS DOOR LOCK ACTUATOR
•  Perform the lock/unlock operation using lock knob for each door.
•  Is door locked/unlocked?
Yes
Go to the next step.
No
•  After inspection, go to Step 5.
3
DETERMINE IF MALFUNCTION CAUSE IS DOOR KEY CYLINDER
•  Insert the auxiliary key into the door key cylinder and perform the lock/unlock operation using the auxiliary key.
•  Does the lock knob switch between lock and unlock?
Yes
Go to the next step.
No
•  Inspect the front door key cylinder switch.
•  After inspection, go to Step 5.
4
INSPECT IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN FRONT DOOR KEY CYLINDER SWITCH AND BCM
•  Disconnect the negative battery cable.
•  Disconnect the front door latch and lock actuator connector.
•  Disconnect the BCM connector.
•  Inspect for continuity between the following terminals (vehicle wiring harness).
―  Front door latch and lock actuator terminal H (L.H.D.)/F (R.H.D.) and BCM terminal 2L
•  Is there continuity?
Yes
Go to the next step.
No
•  Repair or replace the wiring harness for an open circuit.
•  After repair procedure, go to the next step.
5
VERIFY IF MALFUNCTION CAUSE WAS CORRECTED
•  Has the malfunction symptom been eliminated?
Yes
Troubleshooting completed. (Explain the contents of the servicing to the customer.)
No
Verify the malfunction symptom in the symptom troubleshooting chart and perform the applicable other malfunction diagnosis.