Diagnosis Procedure

WARNING: This page is about a different car, the 2020 Infiniti Q50. 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 power window main switch harness connector and ground with oscilloscope.

(+)		(-)	Signal (Reference value)
power window main switch
Connector	Terminal
D8	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 power window main switch connector.
Turn ignition switch ON.

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

(+)		(-)	Voltage (V)
Power window main switch
Connector	Terminal
D8	13	Ground	9 - 16

Is the inspection result normal?

YES

Replace power window main switch. Refer to POWER WINDOW MAIN SWITCH : Removal & Installation .

GO TO 3.

CHECK POWER WINDOW SERIAL LINK CIRCUIT

Disconnect BCM connector and power window main switch connector.

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

BCM		Power window main switch		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M14	54	D8	13	Existed

Check continuity between BCM harness connector and ground.

BCM		Ground	Continuity
Connector	Terminal
M14	54		Not existed

Is the inspection result normal?

YES

Replace BCM. Refer to BCM : Removal & Installation .

Repair or replace harness.

CHECK INTERMITTENT INCIDENT
Refer to Inspection .

INSPECTION END