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

      Fig 1: Checking Signal Between Power Window Main Switch Harness Connector And Ground Using Oscilloscope

      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.