REAR LH: Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

1. CHECK ENCODER SIGNAL 
   1. Turn ignition switch ON.
   2. Check signal between rear power window switch LH harness connector and ground with oscilloscope.

      Signal name	(+)		(-)	Signal (Reference value)
      	Rear power window switch LH
      	Connector	Terminal
      Encoder signal 1	D256	12	Ground	Refer to following signal
      Encoder signal 2		15

      Fig 1: Rear Power Window Switch LH Encoder Signal Waveform

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: Replace rear power window switch LH. Refer to "REMOVAL AND INSTALLATION ".

      NO: GO TO 2.

2. CHECK ENCODER SIGNAL CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect rear power window switch LH connector and rear power window motor LH connector.
   3. Check continuity between rear power window switch LH harness connector and rear power window motor LH harness connector.

      Rear power window switch LH		Rear power window motor LH		Continuity
      Connector	Terminal	Connector	Terminal
      D256	12	D204	4	Yes
      	15		6

   4. Check continuity rear power window switch LH harness connector and ground.

      Rear power window switch LH		Ground	Continuity
      Connector	Terminal
      D256	12		No
      	15

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair or replace harness.

3. CHECK ENCODER POWER SUPPLY 
   1. Connect rear power window switch LH connector.
   2. Turn ignition switch ON.
   3. Check voltage between rear power window motor LH harness connector and ground.

      (+)		(-)	Voltage (Approx.)
      Rear power window motor LH
      Connector	Terminal
      D204	5	Ground	12

      Is the inspection result normal? 

      YES: GO TO  5.

      NO: GO TO 4.

4. CHECK ENCODER POWER SUPPLY CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect rear power window switch LH connector.
   3. Check continuity between rear power window switch LH harness connector and rear power window motor LH harness connector.

      Rear power window switch LH		Rear power window motor LH		Continuity
      Connector	Terminal	Connector	Terminal
      D256	4	D204	5	Yes

   4. Check continuity between rear power window switch LH harness connector and ground.

      Rear power window switch LH		Ground	Continuity
      Connector	Terminal
      D256	4		No

      Is the inspection result normal? 

      YES: Replace rear power window switch LH. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair or replace harness.

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

      Rear power window motor LH		Ground	Continuity
      Connector	Terminal
      D204	3		Yes

      Is the inspection result normal? 

      YES: Replace rear power window motor LH. Refer to "REMOVAL AND INSTALLATION - REAR POWER WINDOW MOTOR ".

      NO: GO TO 6.

6. CHECK GROUND CIRCUIT 2 
   1. Disconnect rear power window switch LH harness connector.
   2. Check continuity between rear power window switch LH harness connector and rear power window motor LH harness connector.

      Rear power window switch LH		Rear power window motor LH		Continuity
      Connector	Terminal	Connector	Terminal
      D256	3	D204	3	Yes

   3. Check continuity between rear power window switch LH harness connector and ground.

      Rear power window switch LH		Ground	Continuity
      Connector	Terminal
      D256	3		No

      Is the inspection result normal? 

      YES: Replace rear power window switch LH. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair or replace harness.