Nissan Murano: Power Window Serial Link / Main Power Window and Door Lock/unlock Switch

Component Function Check

CHECK POWER WINDOW SWITCH OUTPUT SIGNAL

CONSULT

Select “CDL LOCK SW ” or “CDL UNLOCK SW” in “Data Monitor” mode of “BCM(DOOR LOCK)”. Refer to CONSULT Function (BCM - DOOR LOCK).

Is the inspection result normal?

Power window serial link is OK.

Refer to Diagnosis Procedure.

Main power window and door lock/unlock switch, power window and door lock/unlock switch RH and BCM transmit and receive the signal by power window serial link.

The signal mentioned below is transmitted from BCM to main power window and door lock/unlock switch and power window and door lock/unlock switch RH:

• Keyless power window down signal

The signal mentioned below is transmitted from main power window and door lock/unlock switch to power window and door lock/unlock switch RH:

• Front door window RH operation signal

• Power window lock switch signal

• Retained power operation signal

Power Window Serial Link Check

CHECK POWER WINDOW SWITCH OUTPUT SIGNAL

1. Remove 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”.

   (+)		(–)	Signal (Reference value)
   BCM
   Connector	Terminal
   M19	54	Ground

Is the inspection result normal?

Power window serial link is OK.

GO TO 2.

CHECK POWER WINDOW SERIAL LINK CIRCUIT

1. Ignition switch OFF.

2. Disconnect BCM connector and main power window and door lock/unlock switch harness connector.

3. Check continuity between BCM connector and main power window and door lock/unlock switch connector.

   BCM		Main power window and door lock/unlock switch		Continuity
   Connector	Terminal	Connector	Terminal
   M19	54	D7	11	Yes

4. Check continuity between BCM connector and ground.

   BCM		Ground	Continuity
   Connector	Terminal
   M19	54		No

Is the inspection result normal?

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

Repair or replace harness or connectors.