Brake Pedal Position Switch Signal Circuit Troubleshooting

Brake Pedal Position Switch Signal Circuit Troubleshooting

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

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, 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 to LOCK (0), or press the engine start/stop button to select the OFF mode.

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 short in the wire between the PCM (A8) and the brake pedal position switch. Also replace the No. 10 HORN/STOP (20 A) fuse in the 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 open in the wire between the brake pedal position switch, and also replace the No. 10 HORN/STOP (20 A) fuse in the under-hood fuse/relay box. Inspect the brake pedal position switch. Adjustments

NO - Repair open in the wire between the PCM (A8) and the brake pedal position switch.