Diagnosis Procedure

PARKING BRAKE SWITCH


Description

Parking brake switch is installed on parking brake lever. It is turned ON when the parking brake is applied. The driver seat control unit judges that the parking brake is engaged if continuity exists in this circuit.



PARKING BRAKE SWITCH


Diagnosis Procedure

1.CHECK PARKING BRAKE SWITCH INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect control device harness connector.
3. Turn ignition switch ON.
4. Check voltage between parking brake switch harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 2.
2.CHECK PARKING BRAKE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit connector.
3. Check continuity between driver seat control unit harness connector and parking brake switch 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 Driver Seat Control Unit.
NO - Repair or replace harness.
3.CHECK PARKING BRAKE SWITCH
Refer to Component Inspection.
Is the inspection result normal?
YES - GO TO 4.
NO - Adjust or replace parking brake switch.
4.CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
- INSPECTION END