Brake Pedal Position Switch Signal Circuit Troubleshooting

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 3.


NO - Inspect the brake pedal position switch.n


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.n


NO - Go to 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.n


NO - Go to 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.n


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