Diagnosis Procedure

LIFTING SWITCH (FRONT)


Description

Lifting switch (front) is equipped to the power seat switch LH on the seat cushion trim cover. The operation signal is input to the driver seat control unit when the lifting switch (front) is operated.





LIFTING SWITCH (FRONT)


Diagnosis Procedure

1. CHECK LIFTING SWITCH SIGNAL





1. Turn ignition switch OFF.
2. Check voltage between driver seat control unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 5
NO - GO TO 2
2. CHECK LIFTING SWITCH (FRONT) CIRCUIT





1. Disconnect driver seat control unit and power seat switch LH.
2. Check continuity between driver seat control unit harness connector and power seat switch LH harness connector.





3. 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 DRIVER SEAT CONTROL UNIT OUTPUT





1. Connect the driver seat control unit.
2. Turn ignition switch OFF.
3. Check voltage between driver seat control unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 4
NO - Replace driver seat control unit. Refer to Driver Seat Control Unit.
4. CHECK LIFTING SWITCH (FRONT)
Refer to Component Inspection.
Is the inspection result normal?
YES - GO TO 5
NO - Replace power seat switch LH. Refer to Disassembly and Assembly.
5. CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
Is the inspection result normal?
YES - Replace driver seat control unit. Refer to Driver Seat Control Unit.
NO - Repair or replace the malfunctioning part.