Diagnosis Procedure

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DOOR LOCK ACTUATOR INPUT SIGNAL

Turn ignition switch OFF.
Disconnect front door lock assembly LH connector.
Check voltage between front door lock assembly LH harness connector and ground.

(+)		(-)	Condition		Voltage (Approx.)
Front door lock assembly LH
Connector	Terminal
D14	1	Ground	Door lock and unlock switch	Lock	Battery voltage
	2			Unlock

Is the inspection result normal?

YES

Replace front door lock assembly LH. Refer to Removal and Installation .

GO TO 2.

CHECK DOOR LOCK ACTUATOR CIRCUIT

Disconnect BCM, all door lock actuators and fuel lid door lock actuator (if equipped) connector.

Check continuity between BCM harness connector and front door lock assembly LH harness connector.

BCM		Front door lock assembly LH		Continuity
Connector	Terminal	Connector	Terminal
M81	135	D14	1	Yes
	137		2

Check continuity between BCM harness connector and ground.

BCM		Ground	Continuity
Connector	Terminal
M81	135		No
	137

Is the inspection result normal?

YES

GO TO 3.

Repair or replace harness.

CHECK BCM OUTPUT SIGNAL

Connect BCM connector.
Check voltage between BCM harness connector and ground.

(+)		(-)	Condition		Voltage (Approx.)
BCM
Connector	Terminal
M81	135	Ground	Door lock and unlock switch	Lock	Battery voltage
	137			Unlock

Is the inspection result normal?

YES

Check for internal short of each door lock actuator and fuel lid door lock actuator (if equipped).

Replace BCM. Refer to Removal and Installation .