Brake Pedal Position Switch Signal Circuit Troubleshooting

Brake Pedal Position Switch Signal Circuit Troubleshooting

1. Turn the ignition switch to ON (II).

2. Check the BRAKE SWITCH in the DATA LIST with the HDS.

Does it indicate OFF?
YES - Go to step 3.

NO - Inspect the brake pedal position switch. Testing and Inspection


3. Press the brake pedal while checking the BRAKE SWITCH in the DATA LIST with the HDS.

Does it change to ON?
YES - The brake pedal position switch signal circuit (BKSW line) is OK.

NO - Go to step 4.


4. Turn the ignition switch to LOCK (0).

5. Jump the SCS line with the HDS.

6. Disconnect the brake pedal position switch 4P connector.

7. Disconnect ECM connector E (31P).

8. Check for continuity between ECM connector terminal E22 and body ground.

Is there continuity?
YES - Repair short in the wire between the ECM (E22) and the brake pedal position switch.

NO - Go to step 9.






9. Check for continuity between ECM connector terminal E22 and brake pedal position switch 4P connector terminal No. 3.

Is there continuity?
YES - Repair open in the wire between the brake pedal position switch and the No. 47 STOP (15 A) fuse. Also, inspect the brake pedal position switch. Testing and Inspection

NO - Repair open in the wire between the ECM (E22) and the brake pedal position switch.