Check signal between BCM connector and ground with oscilloscope.
Is the Inspection result normal?
YES >> GO TO 6
NO >> GO TO 2 2.CHECK UNLOCK SENSOR CIRCUIT
Turn ignition switch OFF.
Disconnect BCM and front door lock assembly LH connector.
Check continuity between BCM connector and front door lock assembly LH connector.
Check continuity between BCM connector and ground.
Is the Inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness between BCM and front door lock assembly LH. 3.CHECK UNLOCK SENSOR GROUND CIRCUIT
Check continuity between front door lock assembly LH connector and ground.
Is the Inspection result normal?
YES >> GO TO 4
NO >> Repair or replace harness. 4.CHECK BCM OUTPUT SIGNAL
Connect BCM harness connector.
Check signal between BCM connector and ground with oscilloscope.