DRIVER SIDE: Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM - WITH INTELLIGENT KEY SYSTEM ".

1. CHECK DOOR LOCK/UNLOCK SWITCH INPUT SIGNAL 

   With CONSULT

   Check main power window and door lock/unlock switch ("CDL LOCK SW", "CDL UNLOCK SW") in DATA MONITOR mode in CONSULT.

   • When main power window and door lock/unlock switch is turned to LOCK:

     CDL LOCK SW: ON 

   • When main power window and door lock/unlock switch is turned to UNLOCK:

     CDL UNLOCK SW: ON 

   Without CONSULT

   1. Remove key from ignition key cylinder.
   2. Using an oscilloscope, check the signal between BCM connector M18 terminal 22 and ground when the main power window and door lock/unlock switch is turned to LOCK or UNLOCK.
   3. Make sure the signals which are shown in the figure below can be detected during 10 seconds just after the door lock/unlock switch is turned to LOCK or UNLOCK.

      Connector	Terminal		Voltage (V)
      	(+)	(-)
      M18	22	Ground

      Fig 1: Checking Door Lock/Unlock Switch Input Signal

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: Door lock and unlock switch circuit is OK.

      NO: GO TO 2

2. CHECK BCM OUTPUT SIGNAL 
   1. Turn ignition switch OFF.
   2. Using the vehicle operational Intelligent Key, press and hold the UNLOCK button for more than 3 seconds.

      The front windows should be lowered. 

      Is the inspection result normal? 

      YES: GO TO 3

      NO: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

3. CHECK DOOR LOCK/UNLOCK SWITCH GROUND HARNESS 
   1. Disconnect main power window and door lock/unlock switch.
   2. Check continuity between main power window and door lock/unlock switch connector D8 terminal 17 and ground.

      17 - Ground: Continuity should exist. 

      Fig 2: Checking Door Lock/Unlock Switch Ground Harness Continuity

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO 4

      NO: Repair or replace harness.

4. CHECK POWER WINDOW SERIAL LINK CIRCUIT 
   1. Disconnect BCM.
   2. Check continuity between BCM connector M18 terminal 22 and main power window and door lock/unlock switch connector D7 terminal 14.

      22 - 14: Continuity should exist. 

      Fig 3: Checking Power Window Serial Link Circuit Continuity

      Courtesy of NISSAN NORTH AMERICA, INC.
   3. Check continuity between BCM connector M18 terminal 22 and ground.

      22 - Ground: Continuity should not exist. 

      Fig 4: Checking Continuity Between BCM Connector M18 Terminal 22 And Ground

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: Replace main power window and door lock/unlock switch.

      NO: Repair or replace harness.