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 Adjustments.

3. Press the brake pedal while 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 to LOCK (0).

5. Jump the SCS line with the HDS.

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

7. Disconnect PCM connector A (49P).

8. Check for continuity between PCM connector terminal A8 and body ground.





Is there continuity?

YES -

Repair a short in the wire between the PCM (A8) and the brake pedal position switch. Also, replace the No. 11 STOP/HORN (20 A) fuse in the auxiliary under-hood fuse/relay box.

NO -

Go to step 9.

9. Connect brake pedal position switch 4P connector terminal No. 2 to body ground with a jumper wire.






10. Check for continuity between PCM connector terminal A8 and body ground.





Is there continuity?

YES -

Repair an open or short in the wire between the brake pedal position switch and the No. 11 STOP/HORN (20 A) fuse in the auxiliary under-hood fuse/relay box. If the circuit is OK, replace the brake pedal position switch Adjustments.

NO -

Repair open in the wire between the PCM (A8) and the brake pedal position switch.