POWER WINDOW MAIN SWITCH: Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

1. CHECK MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH OUTPUT SIGNAL 
   1. Remove Intelligent Key or ignition key, and close front door LH and RH.
   2. Check signal between BCM connector and ground with oscilloscope when door lock and unlock switch (LH and RH) is turned to "LOCK" or "UNLOCK".
   3. Check that signals which are shown in the figure below can be detected during 10 second just after door lock and unlock switch (LH and RH) is turned to "LOCK" or "UNLOCK".
      Fig 1: Checking Signal Between BCM Connector And Ground

      Courtesy of NISSAN NORTH AMERICA, INC.

      Terminal			Signal (Reference value)
      (+)		(-)
      BCM connector	Terminal
      M18	22	Ground

      Is the inspection result normal? 

      YES: Power window serial link is OK.

      NO: GO TO 2

2. CHECK POWER WINDOW SERIAL LINK CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect BCM and main power window and door lock/unlock switch.
   3. Check continuity between BCM connector and main power window and door lock/unlock switch connector.

      BCM connector	Terminal	Main power window and door lock/unlock switch connector	Terminal	Continuity
      M18 (A)	22	D7 (B)	14	Yes

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

      Courtesy of NISSAN NORTH AMERICA, INC.
   4. Check continuity between BCM connector and ground.

      BCM connector	Terminal	Ground	Continuity
      M18 (A)	22		No

      Is the inspection result normal? 

      YES: Replace main power window and door lock/unlock switch. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair or replace harness.