Front

LIFTING SENSOR (FRONT)

Description

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


Component Function Check


1. CHECK FUNCTION

1.Select "LIFT FR PULSE" in "DATA MONITOR" mode with CONSULT.
2.Check the lifting sensor (front) 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 (FRONT) SIGNAL

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





Is the inspection result normal?
YES- GO TO 4.
NO- GO TO 2.

2. CHECK LIFTING SENSOR (FRONT) CIRCUIT

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





4.Check 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 (FRONT) POWER SUPPLY

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





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

4. CHECK LIFTING SENSOR (FRONT) POWER SUPPLY CIRCUIT

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





4.Check 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 (FRONT) GROUND

1.Turn ignition switch OFF.
2.Check continuity between lifting motor LH (front) harness connector and ground.





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