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 ECM/PCM connector A (49P).

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





Is there continuity?

YES -

Repair short in the wire between the ECM/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 ECM/PCM connector terminal A8 and body ground.





Is there continuity?

YES -

Repair open in the wire between the brake pedal position switch and the No. 10 HORN/STOP (20 A) fuse in the under-hood fuse/relay box. Also check the brake pedal position switch Adjustments.

NO -

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