Power Window Serial Link Check

1. Remove key and close front door LH and RH.
2. 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".
3. 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	Terminal
   M20	54	Ground	Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES

Power window serial link is OK.

NO

GO TO 2 .

1. Turn ignition switch OFF.
2. Disconnect BCM and main power window and door lock/unlock switch.
3. Check continuity between BCM harness connector and main power window and door lock/unlock switch harness connector.
   With Crew Cab
   
   

   BCM	Terminal	Main power window and door lock/unlock switch	Terminal	Continuity
   M20	54	D7	11	Yes

   Except Crew Cab
   
   

   BCM	Terminal	Main power window and door lock/unlock switch	Terminal	Continuity
   M20	54	D5	9	Yes

4. Check continuity between BCM connector and ground.

   BCM	Terminal	Ground	Continuity
   M20	54		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 or connectors.