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 troubleshooting for DTC 86 86, and recheck.�

NO -

Go to step 3.

3. Clear the DTCs with the HDS.

4. Turn the ignition switch to LOCK (0) and then back to ON (II).

5. Check for DTCs with the HDS.

Is DTC 68 indicated?

YES -

Go to step 6.

NO -

Intermittent failure, the system is OK at this time. Check for loose terminals between the brake pedal position switch 4P connector, PCM connector A (49P), and the VSA modulator-control unit 46P connector. Refer to intermittent failures troubleshooting.�

6. Check BRAKE SWITCH in the VSA DATA LIST with the HDS.

Is the brake pedal position switch ON with the brake pedal released?

YES -

Go to step 7.

NO -

Replace the VSA modulator-control unit Service and Repair.�

7. Check the brake pedal position switch function Testing and Inspection and adjustment Adjustments.

Is the brake pedal position switch OK and its adjustment OK?

YES -

Go to step 8.

NO -

Replace or adjust the brake pedal position switch.�

8. Turn the ignition switch to LOCK (0), and short the SCS line with the HDS.

9. Disconnect PCM connector A (49P) Service and Repair.

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

11. Measure the voltage between PCM connector terminal A8 and body ground.





Is there 0.2 V or more with the brake pedal released?

YES -

Repair a short to power in the wire between the brake pedal position switch and the PCM (A8).�

NO -

Go to step 12.

12. Check the BRK PRESS in the VSA DATA LIST with the HDS.

Is the brake pressure at 0.0 with the brake pedal released?

YES -

Intermittent failure, the system is OK at this time. Check for loose terminals between the brake pedal position switch 4P connector, PCM connector A (49P), and the VSA modulator-control unit 46P connector. Refer to intermittent failures troubleshooting.�

NO -

Go to step 13.

13. Remove the brake pedal position switch.

Does the brake pressure drop to 0.0?

YES -

Install and adjust the brake pedal position switch Adjustments.�

NO -

Refer to the brake system inspection and test Component Tests and General Diagnostics.�