68-1

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), or press the engine start/stop button to select the ON mode.

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

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), or press the engine start/stop button to select the ON mode.

6. Clear the DTC with the HDS.

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

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 Brake Pedal Position Switch Signal Circuit Troubleshooting.

11. Reconnect all connectors.

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

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

14. Clear the DTC with the HDS.

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

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 ECM/PCM connector A (49P). If the ECM/PCM was updated, substitute a known-good ECM/PCM, then retest. If the ECM/PCM was substituted, go to step 18.

NO -

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

18. Update the VSA modulator-control unit if it does not have the latest software Testing and Inspection.

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

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 and the symptom/indication is still present, replace the VSA modulator-control unit Service and Repair.

NO -

If the VSA modulator-control unit was updated, troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.