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.
2011 Chevrolet VoltFACTORY OEM SERVICE PROCEDURE
Testing the Control Module Circuits
- Ignition OFF, Ignition OFF and all vehicle systems OFF, all keys at least 3 meters away from vehicle, all access doors closed. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 10 Ξ© between the low reference circuit terminal at the control module that was just disconnected and ground.
- If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuits test normal, replace the appropriate control module.
- Ignition ON, test for 4.8-5.2 V between each 5 V reference circuit terminal and ground, at the control module connector that was just disconnected.
- If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the appropriate control module.
- If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the appropriate control module.
- Connect the harness connectors at the control module that was just disconnected.
- Repeat step 1 at another control module until a short to voltage, a short to ground, or an open/high resistance is found on the control module circuits.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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