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 UNLOCK SENSOR INPUT SIGNAL

Turn ignition switch OFF.
Disconnect front door lock assembly LH connector.

Check signal between front door lock assembly LH harness connector and ground with oscilloscope.

(+)		(-)	Signal (Reference value)
Front door lock assembly LH
Connector	Terminal
D14	3	Ground	Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES

GO TO 3.

GO TO 2.

CHECK UNLOCK SENSOR CIRCUIT

Disconnect BCM 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	Continuity
M18	30	D14	3	Yes

Check continuity between BCM harness connector and ground.

BCM		Ground	Continuity
Connector	Terminal
M18	30		No

Is the inspection result normal?

YES

Replace BCM. Refer to Removal and Installation .

Repair or replace harness.

CHECK UNLOCK SENSOR GROUND CIRCUIT

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

Front door lock assembly LH		Ground	Continuity
Connector	Terminal
D14	4		Yes

Is the inspection result normal?

YES

GO TO 4.

Repair or replace harness.

CHECK UNLOCK SENSOR
Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 5.

NO

Replace front door lock assembly LH. Refer to Removal and Installation .
CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .

Inspection End.