Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

1. CHECK ENCODER SIGNAL
   
   
   1. Turn ignition switch ON.
   2. Check signal between main power window and door lock/unlock switch harness connector and ground with oscilloscope.

      Signal name	(+)		(-)	Signal (Reference value)
      	Main power window and door lock/unlock switch
      	Connector	Terminal
      Encoder signal 1	D7	5	Ground	Refer to following signals
      Encoder signal 2		4

      Courtesy of NISSAN NORTH AMERICA, INC.

   Is the inspection result normal?

   YES 

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

   NO 

   GO TO STEP 2  .

2. CHECK ENCODER SIGNAL CIRCUIT
   
   
   1. Turn ignition switch OFF.
   2. Disconnect main power window and door lock/unlock switch connector and front power window motor LH connector.
   3. Check continuity between main power window and door lock/unlock switch harness connector and front power window motor LH harness connector.

      Main power window and door lock/unlock switch		Front power window motor LH		Continuity
      Connector	Terminal	Connector	Terminal
      D7	4	D9	5	Yes
      	5		3

   4. Check continuity between main power window and door lock/unlock switch harness connector and ground.

      Main power window and door lock/unlock switch		Ground	Continuity
      Connector	Terminal
      D7	4		No
      	5

   Is the inspection result normal?

   YES 

   GO TO STEP 3  .

   NO 

   Repair or replace harness.

3. CHECK ENCODER POWER SUPPLY
   
   
   1. Connect main power window and door lock/unlock switch connector.
   2. Turn ignition switch ON.
   3. Check voltage between front power window motor LH harness connector and ground.

      (+)		(-)	Voltage (Approx.)
      Front power window motor LH
      Connector	Terminal
      D9	4	Ground	Battery voltage

   Is the inspection result normal?

   YES 

   GO TO STEP 5  .

   NO 

   GO TO STEP 4  .

4. CHECK ENCODER POWER SUPPLY CIRCUIT
   
   
   1. Turn ignition switch OFF.
   2. Disconnect main power window and door lock/unlock switch connector.
   3. Check continuity between main power window and door lock/unlock switch harness connector and front power window motor LH harness connector.

      Main power window and door lock/unlock switch		Front power window motor LH		Continuity
      Connector	Terminal	Connector	Terminal
      D7	14	D9	4	Yes

   4. Check continuity between main power window and door lock/unlock switch harness connector and ground.

      Main power window and door lock/unlock switch		Ground	Continuity
      Connector	Terminal
      D7	14		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.

5. CHECK GROUND CIRCUIT 1
   
   
   1. Turn ignition switch OFF.
   2. Check continuity between front power window motor LH harness connector and ground.

      Front power window motor LH		Ground	Continuity
      Connector	Terminal
      D9	6		Yes

   Is the inspection result normal?

   YES 

   Replace front power window motor LH. Refer to REMOVAL AND INSTALLATION .

   NO 

   GO TO STEP 6  .

6. CHECK GROUND CIRCUIT 2
   
   
   1. Disconnect main power window and door lock/unlock switch connector.
   2. Check continuity between main power window and door lock/unlock switch harness connector and front power window motor LH harness connector.

      Main power window and door lock/unlock switch		Front power window motor LH		Continuity
      Connector	Terminal	Connector	Terminal
      D7	12	D9	6	Yes

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

      Main power window and door lock/unlock switch		Ground	Continuity
      Connector	Terminal
      D7	12		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.