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
Control Pilot Circuit Testing
- Ignition OFF, disconnect the X1 harness connector at the P36 battery state of charge indicator.
- Test for less than 10 Ξ© between the low reference terminal C and ground.
- If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K114B hybrid powertrain control module 2.
- Disconnect the cordset for at least 10 seconds. While Connecting the cordset and starting the vehicle high voltage battery charging, verify that a test lamp illuminates between the control pilot signal terminal A and ground during the first 5 seconds of the vehicle charging starting.
- If the test lamp does not illuminate, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K114B hybrid powertrain control module 2.
- If all circuits test normal, replace the P36 battery state of charge indicator.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.