Diesel Data: Automotive Repair

DTC 68

DTC 68: Brake Pedal Position Switch
1. Turn the ignition switch ON (II).
2. Check for other DTCs.
Is another DTC indicated?
YES - Do the appropriate troubleshooting for the DTC.
NO - Go to step 3.

3. Check the brake pedal position switch, and adjustment.
Is the switch and adjustment OK?
YES - Go to step 4.
NO - Replace the brake pedal position switch.

4. Clear the DTC using the HDS.
5. Turn the ignition switch OFF, then disconnect the HDS.
6. Test-drive the vehicle.
Does the VSA indicator come on, and is DTC 68 indicated?
YES - Go to step 7.
NO - The system is OK at this time.

7. Troubleshoot the brake pedal position switch signal circuit.
Is the brake pedal position switch circuit OK?
YES - Check for loose terminals in the ECM connector, if the connections are OK, substitute a known-good ECM and recheck. If the problem is gone, replace the original ECM. If the problem continues, replace the VSA modulator-control unit.
NO - Repair the brake pedal position switch circuit.