Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 723 (IMA SYSTEM)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.
If the vehicle has one of the symptoms below, check for a diagnostic trouble code (DTC) with the HDS. If there is no DTC, do the diagnostic procedure for the symptom.
SYMPTOM TROUBLESHOOTING CHART
| Symptom | Diagnostic procedure |
|---|---|
| IMA system indicator stays on, no DTCs set | Troubleshoot the IMA system indicator circuit (see step 1 on ). |
| IMA system indicator never comes on, no DTCs set | Troubleshoot the IMA system indicator circuit (see step 1 on ). |
| Charging system indicator stays on, no DTCs set | Troubleshoot the charging system indicator circuit (see step 1 on ). |
| Charging system indicator blinks, no DTCs set | Troubleshoot the charging system indicator circuit (see step 1 on ) |
| Charging system indicator never comes on, no DTCs set | Troubleshoot the charging system indicator circuit (see step 1 on ). |
| HDS does not communicate with the MCM or other vehicle systems | Troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ). |
| Auto idle stop system does not operate | Troubleshoot the auto idle stop system (see AUTO IDLE STOP SYSTEM 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.