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 POWER WINDOW SWITCH INPUT SIGNAL

Turn ignition switch ON.

Check signal between main power window and lock/unlock switch harness connector and ground with oscilloscope.

(+)		(-)	Signal (Reference value)
Main power window and lock/unlock switch
Connector	Terminal
D56	13	Ground	Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES

GO TO 4.

GO TO 2.

CHECK POWER WINDOW SERIAL LINK SIGNAL

Turn ignition switch OFF.
Disconnect main power window and lock/unlock switch connector.
Turn ignition switch ON.

Check voltage between main power window and lock/unlock switch harness connector and ground.

(+)		(-)	Voltage (Approx.)
Main power window and lock/unlock switch
Connector	Terminal
D56	13	Ground	Battery voltage

Is the inspection result normal?

YES

Replace main power window and lock/unlock switch. Refer to Removal and Installation .

GO TO 3.

CHECK POWER WINDOW SERIAL LINK CIRCUIT

Disconnect BCM connector and main power window and lock/unlock switch connector.

Check continuity between BCM harness connector and main power window and lock/unlock switch harness connector.

BCM		Main power window and lock/unlock switch		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M19	54	D56	13	Yes

Is the inspection result normal?

YES

Replace BCM. Refer to Removal and Installation .

Repair or replace harness.

CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .

Inspection End.