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Home >> Chevrolet >> 2010 >> Cobalt LS, 4D Sedan, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 42 (VSA (Vehicle Stability Assist) System Components) >> DTC Troubleshooting >> DTC 68: Brake Pedal Position Switch Malfunction

DTC 68: Brake Pedal Position Switch Malfunction

WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see HOW TO USE THE HDS (HONDA DIAGNOSTIC SYSTEM)  ).
  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 (see BRAKE PEDAL POSITION SWITCH TEST ), and adjustment (see BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH/IDLE STOP SWITCH ADJUSTMENT ).

    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 (see BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH/IDLE STOP SWITCH ADJUSTMENT ).

  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  -The system is OK at this time.

  10. Troubleshoot the brake pedal position switch signal circuit (see 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 (see PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE 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 (see SUBSTITUTING THE 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 (see PCM REPLACEMENT ).

  18. Update the VSA modulator-control unit if it does not have the latest software (see VSA MODULATOR-CONTROL UNIT UPDATE ). If the unit already has the latest software, substitute a known-good VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).
  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 (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ), 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 (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ). If any other DTCs are indicated, go to the indicated DTCs troubleshooting.

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