Diagnosis Procedure

ENCODER

REAR LH : Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" [1][2]Electrical Diagrams.

1. CHECK ENCODER SIGNAL

1.Turn ignition switch ON.
2.Check signal between rear power window switch LH harness connector and ground with oscilloscope.
Revision: March 20122013 Infiniti JX










Is the inspection result normal?
YES- Replace rear power window switch LH. Refer to "Removal and Installation" Main Power Window and Door Lock/Unlock Switch.
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.





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





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.





Is the inspection result normal?
YES- GO TO 5.
NO- GO TO 4.
Revision: March 20122013 Infiniti JX

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.





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





Is the inspection result normal?
YES- Replace rear power window switch LH. Refer to "Removal and Installation" Main Power Window and Door Lock/Unlock Switch.
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.





Is the inspection result normal?
YES- Replace rear power window motor LH. Refer to "Removal and Installation" Service and Repair.
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.





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





Is the inspection result normal?
YES- Replace rear power window switch LH. Refer to "Removal and Installation" Main Power Window and Door Lock/Unlock Switch.
NO- Repair or replace harness.