Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

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

      (+)		(-)	Signal (Reference value)
      Main power window and door lock/unlock switch
      Connector	Terminal
      D35	4	Ground	Refer to following signal
      	5

      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 

   GO TO STEP 7  .

   NO 

   GO TO STEP 2  .

2. CHECK ENCODER SIGNAL CIRCUIT
   
   
   1. Turn power 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
      D35	4	D37	4	Yes
      	5		5

   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
      D35	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 power switch ON.
   3. Check voltage between front power window motor LH harness connector and ground.

      (+)		(-)	Voltage (Approx.)
      Front power window motor LH
      Connector	Terminal
      D37	1	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 power 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
      D35	14	D37	1	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
      D35	14		No

   Is the inspection result normal?

   YES 

   Replace main power window and door lock/unlock switch.

   NO 

   Repair or replace harness.

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

      Front power window motor LH		Ground	Continuity
      Connector	Terminal
      D37	6		Yes

   Is the inspection result normal?

   YES 

   GO TO STEP 7  .

   NO 

   GO TO STEP 6  .

6. CHECK ENCODER GROUND CIRCUIT
   
   
   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
      D35	12	D37	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
      D35	12		No

   Is the inspection result normal?

   YES 

   Replace front power window motor LH.

   NO 

   Repair or replace harness.

7. CHECK INTERMITTENT INCIDENT
   
   

   Refer to INTERMITTENT INCIDENT .

   Inspection End.