Rear

LIFTING SENSOR (REAR)

Description

- The lifting sensor (rear) is installed to the seat frame.
- The pulse signal is input to the driver seat control unit when the lifting (rear) is operated.
- The driver seat control unit counts the pulse and calculates the lifting (rear) amount of the seat.


Component Function Check


1. CHECK FUNCTION

1.Select "LIFT RR PULSE" in " mode with CONSULT.
2.Check lifting sensor (rear) signal under the following conditions.





Is the inspection result normal?
YES- Inspection End.
NO- Perform diagnosis procedure. Refer to "Diagnosis Procedure" .


Diagnosis Procedure

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

1. CHECK LIFTING SENSOR (REAR) SIGNAL

1.Turn ignition switch ON.
2.Read voltage signal between driver seat control unit harness connector and ground with oscilloscope.





Is the inspection result normal?
YES- Replace driver seat control unit. Refer to "Removal and Installation" Service and Repair.
NO- GO TO 2.

2. CHECK LIFTING SENSOR (REAR) CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect driver seat control unit and lifting motor LH (rear).
Revision: March 20122013 Infiniti JX
3.Check the continuity between driver seat control unit harness connector and lifting motor LH (rear) harness connector.





4.Check the continuity between driver seat control unit harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace harness.

3. CHECK LIFTING SENSOR (REAR) POWER SUPPLY

1.Connect driver seat control unit.
2.Turn ignition switch ON.
3.Check the voltage between lifting motor LH (rear) harness connector and ground.





Is the inspection result normal?
YES- GO TO 5.
NO- GO TO 4.

4. CHECK LIFTING SENSOR (REAR) POWER SUPPLY CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect driver seat control unit.
3.Check the continuity between driver seat control unit harness connector and lifting motor LH (rear) harness connector.





4.Check the continuity between driver seat control unit harness connector and ground.





Is the inspection result normal?
YES- Replace driver seat control unit. Refer to "Removal and Installation" Service and Repair.
NO- Repair or replace harness.

5. CHECK LIFTING SENSOR (REAR) GROUND

1.Turn ignition switch OFF.
2.Check the continuity between lifting motor LH (rear) harness connector and ground.
Revision: March 20122013 Infiniti JX





Is the inspection result normal?
YES- Replace lifting motor LH (rear). Refer to "Removal and Installation" Removal and Installation.
NO- Repair or replace harness.
Revision: March 20122013 Infiniti JX