Parking Brake Switch

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.




Component Function Check
1.CHECK PARKING BRAKE SWITCH INPUT SIGNAL
1. Select "PARK BRAKE SW" in the "Data Monitor" mode using CONSULT-III.
2. Check parking brake switch signal under the following conditions.





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




Diagnosis Procedure
1.CHECK PARKING BRAKE SWITCH INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect A/T shift selector 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. Removal And Installation.
NO - Repair or replace harness.
3.CHECK PARKING BRAKE SWITCH
SEE Component Inspection.
Is the inspection result normal?
YES - GO TO 4.
NO - Adjust or replace parking brake switch.
4.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
- INSPECTION END




Component Inspection
1.CHECK PARKING BRAKE SWITCH
1. Turn ignition switch OFF.
2. Disconnect parking brake switch connector.
3. Check continuity between parking brake switch terminal and ground part of parking brake switch.





Is the inspection result normal?
YES - INSPECTION END
NO-1 - Adjust or replace parking brake switch (pedal type). Exploded View.
NO-2 - Adjust or replace parking brake switch (lever type). Exploded View.