Manufacturer Code Charts: 68

VSA DTC Troubleshooting: 68

DTC 68:

Brake Pedal Position Switch Malfunction

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information Reading and Clearing Diagnostic Trouble Codes.

1. Turn the ignition switch to ON (II).

2. Check for other system DTCs.

Is another DTC indicated?

YES -

Do the appropriate troubleshooting for the DTC.�

NO -

Go to step 3.

3. Turn the ignition switch to LOCK (0).

4. Check the brake pedal position switch Testing and Inspection, and adjustment Adjustments.

Is the brake pedal position switch and adjustment OK?

YES -

Go to step 5.

NO -

Adjust the brake pedal position switch. If necessary, replace the brake pedal position switch Adjustments.�

5. Turn the ignition switch to ON (II).

6. Clear the DTC with the HDS.

7. Turn the ignition switch to LOCK (0).

8. Test-drive the vehicle at 19 mph (30 km/h) or more.

NOTE: Drive the vehicle on the road, not on a lift.

9. Check for DTCs with the HDS.

Is DTC 68 indicated?

YES -

Go to step 10.

NO -

Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting.�

10. Troubleshoot the brake pedal position switch signal circuit Brake Pedal Position Switch Signal Circuit Troubleshooting.

Is the brake pedal position switch circuit OK?

YES -

Go to step 11.

NO -

Repair the brake pedal position switch circuit.�

11. Reconnect all connectors.

12. Update the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM.

13. Turn the ignition switch to ON (II).

14. Clear the DTC with the HDS.

15. Turn the ignition switch to LOCK (0).

16. Test-drive the vehicle at 19 mph (30 km/h) or more.

NOTE: Drive the vehicle on the road, not on a lift.

17. Check for DTCs with the HDS.

Is DTC 68 indicated?

YES -

Check for loose terminals in the PCM connector A (49P). If the PCM was updated, substitute a known-good PCM, then retest. If the PCM was substituted, go to step 18.

NO -

If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM Service and Repair.�

18. Update the VSA modulator-control unit if it does not have the latest software Testing and Inspection. If the unit already has the latest software, substitute a known-good VSA modulator-control unit Service and Repair.

19. Turn the ignition switch to LOCK (0).

20. Test-drive the vehicle at 19 mph (30 km/h) or more.

NOTE: Drive the vehicle on the road, not on a lift.

21. Check for DTCs with the HDS.

Is DTC 68 indicated?

YES -

Check for loose terminals in the VSA modulator-control unit 47P connector. If the VSA modulator-control unit was updated, substitute a known-good VSA modulator-control unit Service and Repair, then retest. If the VSA modulator-control unit was substituted, go to step 1.

NO -

If the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the original VSA modulator-control unit Service and Repair. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.�