REAR LH: Diagnosis Procedure: Notes

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK REAR POWER WINDOW SWITCH LH

Remove Intelligent Key, and close all doors.
Check signal between BCM connector M18 terminal 40 and ground with oscilloscope when door lock and unlock switch (key cylinder switch) 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 (key cylinder switch) is turned to "LOCK" or "UNLOCK".

Fig 1: Checking Signal Between BCM Connector Terminal 40 And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.NISSAN MOTOR CO., U.S.A.

SIGNAL REFERENCE

Terminal			Signal (Reference value)
(+)		(-)
BCM connector	Terminal	(-)
M18	40	Ground	Courtesy of NISSAN MOTOR CO., U.S.A.

Is the inspection result normal?

YES: Power window serial link is OK.

NO: GO TO 2

CHECK POWER WINDOW SERIAL LINK CIRCUIT

Turn ignition switch OFF.
Disconnect BCM connector M18 and rear power window switch LH connector.

Check continuity between BCM connector M18 (A) terminal 40 and rear power window switch LH connector D207 (B) terminal 16.

CONTINUITY SPECIFICATION

BCM connector	Terminal	Rear power window switch LH connector	Terminal	Continuity
M18 (A)	40	D207 (B)	16	Yes

Fig 2: Checking Continuity Between BCM Connector And Power Window And Door Lock/Unlock Switch RH Connector

Courtesy of NISSAN MOTOR CO., U.S.A.

Check continuity between BCM connector M18 (A) terminal 40 and ground.

CONTINUITY SPECIFICATION

BCM connector	Terminal	Ground	Continuity
M18 (A)	40	Ground	No

Is the inspection result normal?

YES: Replace rear power window switch LH. Refer to "REMOVAL AND INSTALLATION ".

NO: Repair or replace harness or connectors.