Brake Pedal Position Switch

BRAKE PEDAL POSITION SWITCH

Component Function Check


1. CHECK BRAKE PEDAL POSITION SWITCH FUNCTION

With CONSULT
1.Turn ignition switch ON.
2.Select "BRAKE SW1" in "DATA MONITOR" mode with CONSULT.
3.Check "BRAKE SW1" indication under the following conditions.





Without CONSULT
1.Turn ignition switch ON.
2.Check the voltage between ECM harness connector terminals.





Is the inspection result normal?
YES- INSPECTION END
NO- Proceed to "Diagnosis Procedure" .


Diagnosis Procedure


1. CHECK BRAKE PEDAL POSITION SWITCH POWER SUPPLY CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect brake pedal position switch harness connector.
3.Turn ignition switch ON.
4.Check the voltage between brake pedal position switch harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 2.

2. CHECK BRAKE PEDAL POSITION SWITCH POWER SUPPLY CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect fuse block (J/B) harness connector.
3.Check the continuity between brake pedal position switch harness connector and fuse block (J/B) harness connector.





Is the inspection result normal?
YES- Perform the trouble diagnosis for power supply circuit.
NO- Repair or replace error-detected parts.

3. CHECK BRAKE PEDAL POSITION SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check the continuity between brake pedal position switch harness connector and ECM harness connector.





4.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 4.
NO- Repair open circuit, short to ground or short to power in harness or connectors.

4. CHECK BRAKE PEDAL POSITION SWITCH

Check brake pedal position switch. Refer to "Component Inspection (Brake Pedal Position Switch)" .
Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Replace brake pedal position switch. Refer to "Exploded View" Exploded View.


Component Inspection (Brake Pedal Position Switch)


1. CHECK BRAKE PEDAL POSITION SWITCH-I

1.Turn ignition switch OFF.
2.Disconnect brake pedal position switch harness connector.
3.Check the continuity between brake pedal position switch terminals under the following conditions.





Is the inspection result normal?
YES- INSPECTION END
NO- GO TO 2.

2. CHECK BRAKE PEDAL POSITION SWITCH-II

1.Adjust brake pedal position switch installation. Refer to "Inspection and Adjustment" Adjustments.
2.Check the continuity between brake pedal position switch terminals under the following conditions.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace brake pedal position switch. Refer to "Removal and Installation" Removal And Installation.