Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DOOR SWITCH INPUT SIGNAL

Turn ignition switch OFF.
Disconnect malfunctioning door switch connector.

Check signal between malfunctioning door switch harness connector and ground using oscilloscope.

(+)			(-)	Signal (Reference value)
Door switch
Connector		Terminal
Driver side	B42	3	Ground	Courtesy of NISSAN NORTH AMERICA, INC. 11.8 V
Passenger side	B70	3
Rear LH	B44	3
Rear RH	B78	3

Is the inspection result normal?

YES

GO TO STEP 3 .

GO TO STEP 2 .

CHECK DOOR SWITCH CIRCUIT

Disconnect BCM connector.

Check continuity between door switch harness connector and BCM harness connector.

Door switch			BCM		Continuity
Connector		Terminal	Connector	Terminal	Continuity
Driver side	B42	3	M15	96	Existed
Passenger side	B70			94
Rear LH	B44			82
Rear RH	B78			93

Check continuity between door switch harness connector and ground.

Door switch			Ground	Continuity
Connector		Terminal
Driver side	B42	3		Not existed
Passenger side	B70
Rear LH	B44
Rear RH	B78

Is the inspection result normal?

YES

Replace BCM. Refer to REMOVAL AND INSTALLATION .

Repair or replace harness.

CHECK DOOR SWITCH

Refer to COMPONENT INSPECTION .

Is the inspection result normal?

YES

GO TO STEP 4 .

NO

Replace malfunctioning door switch.

CHECK INTERMITTENT INCIDENT

Refer to INTERMITTENT INCIDENT .

INSPECTION END