Brake Pedal Position Switch Signal Circuit Troubleshooting

Brake Pedal Position Switch Signal Circuit Troubleshooting 2005-2006 models

1. Turn the ignition switch 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.

3. Press the brake pedal, and check 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 OFF.
5. Jump the SCS line with the HDS.
6. Disconnect the brake pedal position switch 4P connector.
7. Disconnect ECM/PCM connector E (31P).




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

Is there continuity?

YES - Repair short in the wire between the ECM/PCM (E22) and the No. 7 HORN, STOP (15 A) fuse. Replace the No. 7 HORN, STOP (15 A) fuse.

NO - Go to step 9.




9. Check for continuity between ECM/PCM connector terminal E22 and brake pedal position switch 4P connector terminal No. 2.

Is there continuity?

YES - Repair open in the wire between the brake pedal position switch and the No. 7 HORN, STOP (15 A) fuse. Inspect the brake position switch.

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