Diagnosis Procedure

LIFTING SENSOR (FRONT)


Diagnosis Procedure

1.CHECK LIFTING SENSOR (FRONT) SIGNAL
1. Turn ignition switch ON.
2. Check the voltage signal driver seat control unit harness connector and ground using an oscilloscope.





Is the inspection result normal?
YES - Replace driver seat control unit. Removal and Installation.
NO - GO TO 2.
2.CHECK LIFTING SENSOR (FRONT) CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit and lifting motor (front) connector.
3. Check continuity between driver seat control unit harness connector and lifting motor (front) harness connector.





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 connector.
2. Turn ignition switch ON.
3. Check voltage between lifting motor (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 connector.
3. Check continuity between driver seat control unit harness connector and lifting motor (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. Removal and Installation.
NO - Repair or replace harness.
5.CHECK LIFTING SENSOR (FRONT) GROUND CIRCUIT 1
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit connector.
3. Check continuity between driver seat control unit harness connector and lifting motor (front) harness connector.





Is the inspection result normal?
YES - GO TO 6.
NO - Repair or replace harness.
6.CHECK LIFTING SENSOR (FRONT) GROUND CIRCUIT 2
1. Connect driver seat control unit connector.
2. Check continuity between lifting motor (front) harness connector and ground.





Is the inspection result normal?
YES - Replace lifting motor (front). Exploded View.
NO - Replace driver seat control unit. Removal and Installation.