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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 762 (VSA (VEHICLE STABILITY ASSIST) SYSTEM COMPONENTS)SYMPTOM TROUBLESHOOTING INDEX
2006 Chevrolet Cobalt SS, 4D Sedan, Standard

Symptom Troubleshooting Index

2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Symptom Troubleshooting Index
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.

When the vehicle has one of these symptoms, check for all systems diagnostic trouble codes (DTCs) with the HDS. If there are no DTCs, do the diagnostic procedure for the symptom, in the sequence listed, until you find the cause.

TROUBLESHOOTING CHART

Symptom Diagnostic procedure
HDS does not communicate with the VSA modulator-control unit or the vehicle Troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ).
ABS indicator, brake system indicator (red), VSA indicator, and brake system indicator (amber) or VSA OFF indicator does not come on at start-up (bulb check).
  1. Do the gauge control module troubleshooting, (see SELF-DIAGNOSTIC FUNCTION ).
  2. Update the VSA modulator-control unit if it does not have the latest software (see VSA MODULATOR-CONTROL UNIT UPDATE ), or substitute a known-good VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ), then retest. If it is OK, 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 ).
VSA cannot be turned OFF
  1. Symptom troubleshooting (see SYMPTOM TROUBLESHOOTING ).
  2. Update the VSA modulator-control unit if it does not have the latest software (see VSA MODULATOR-CONTROL UNIT UPDATE ), or substitute a known-good VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ), then retest. If it is OK, 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 ).
VSA OFF indicator does not go off Do the VSA sensor neutral position memorization (see VSA SENSOR NEUTRAL POSITION MEMORIZATION ).
ABS indicator, brake system indicator (red), VSA indicator, and brake system indicator (amber) do not go off
  1. Check for F-CAN DTCs, and troubleshoot and repair those first.
  2. Symptom troubleshooting (see SYMPTOM TROUBLESHOOTING ).
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.