Power Window Serial Link Check

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH RH

Remove key and close the front door LH and RH.
Check signal between BCM harness connector and ground with oscilloscope when door lock and unlock switch (LH and RH) is turned to "LOCK" or "UNLOCK".

Check that signals which are shown in the figure below can be detected during 10 seconds just after door lock and unlock switch (LH and RH) is turned to "LOCK" or "UNLOCK".

Terminal			Signal (Reference value)
(+)		(-)
BCM connector	Terminal
M20	54	Ground	Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES

Power window serial link is OK.

GO TO 2

CHECK POWER WINDOW SERIAL LINK CIRCUIT

Turn ignition switch OFF.
Disconnect BCM.

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

BCM connector	Terminal	Power window and door lock/unlock switch RH connector	Terminal	Continuity
M20	54	D105	3	Yes

Check continuity between BCM connector and ground.

BCM connector	Terminal	Ground	Continuity
M20	54	Ground	No

Is the inspection result normal?

YES

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

Repair or replace the harness or connectors.