Diesel Data: Automotive Repair

Manufacturer Code Charts: 68




VSA DTC Troubleshooting: 68

DTC 68:

Brake Pedal Position Switch Stuck ON (Hardware)

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

2. Check for DTCs with the HDS.

Is DTC 86 indicated with DTC 68 at the same time?

YES -

Do the DTC 86 troubleshooting 86.�

NO -

Go to step 3.

3. Check the BRAKE SWITCH in the VSA DATA LIST with the HDS while pressing the brake pedal.

Does it indicate ON when the pedal is pressed, and OFF when the pedal is released?

YES -

Go to step 4.

NO -

Go to step 7.

4. Clear the DTC with the HDS.

5. Test-drive the vehicle at 19 mph (30 km/h) for 60 seconds or more.

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

6. Check for DTCs with the HDS.

Is DTC 68 indicated?

YES -

Check for loose terminals in the VSA modulator-control unit 46P connector. If necessary, substitute a know-good VSA modulator-control unit Service and Repair, then retest. If the VSA modulator-control unit was substituted, go to step 1.�

NO -

Intermittent failure, the system is OK at this time. Check for loose terminals at the VSA modulator-control unit 46P connector. Refer to intermittent failures troubleshooting Reading and Clearing Diagnostic Trouble Codes.�

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

8. Disconnect the brake pedal position switch 4P connector.

9. Do the brake pedal position switch test: '07-09 models, '10 model Brake Pedal Position Switch Signal Circuit Troubleshooting.

Is the switch OK?

YES -

Check the fuel and emissions systems, and troubleshoot the brake pedal position switch signal circuit.�

NO -

Replace the brake pedal position switch Adjustments.�