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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 83: PCM Malfunction

DTC 83: PCM 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 DTC with the HDS.

    Is DTC 86 indicated? 

    YES  -Do the troubleshooting for DTC 86 (see DTC 86: F-CAN COMMUNICATION MALFUNCTION ).

    NO  -Go to step 3.

  3. Clear the DTC with the HDS.
  4. Turn the ignition switch to LOCK (0).
  5. Test-drive the vehicle at 19 mph (30 km/h) or more.
    NOTE: Drive the vehicle on the road, not on a lift.
  6. Check for DTCs with the HDS.

    Is DTC 83 Indicated? 

    YES  -Go to step 7.

    NO  -Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting (see INTERMITTENT FAILURES ).

  7. Check for fuel and emissions systems DTCs with the HDS (see GENERAL TROUBLESHOOTING INFORMATION ).

    Are any PCM DTCs indicated? 

    YES  -Do the applicable troubleshooting for the PCM.

    NO  -Go to step 8.

  8. 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 ).
  9. Turn the ignition switch to LOCK (0).
  10. Test-drive the vehicle at 19 mph (30 km/h) or more.
    NOTE: Drive the vehicle on the road, not on a lift.
  11. Check for DTCs with the HDS.

    Is DTC 83 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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