Lifting Sensor (Front)

LIFTING SENSOR (FRONT)

Component Function Check
1.CHECK FUNCTION
1. Select "LIFT FR PULSE" in "Data monitor" mode with CONSULT-III.
2. Check the lifting sensor (front) signal under the following conditions.

Is the indication normal?
YES - INSPECTION END
NO - Perform diagnosis procedure. SEE Diagnosis Procedure.

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

Is the inspection result normal?
YES - Replace driver seat control unit.
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 or connector.
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.
NO - Repair or replace harness or connector.
5.CHECK LIFTING SENSOR (FRONT) GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between lifting motor (front) harness connector and ground.

Is the inspection result normal?
YES - Replace lifting motor (front).
NO - Repair or replace harness or connector.