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 MANUALSCHEVROLET2025EQUINOX EV RS, AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALCHARGING SYSTEMSPLUG-IN CHARGINGDIAGNOSTIC INFORMATION AND PROCEDURESDTC P3027 - P3029CIRCUIT/SYSTEM TESTING
2025 Chevrolet Equinox EV RS, AWD
Circuit/System Testing
2025 Chevrolet Equinox EV RS, AWDSECTION Circuit/System Testing
NOTE:
Circuit/System Verification must be performed before proceeding with Circuit/System Testing.
- Ensure the Battery Charger Coupler Lock is in the UNLOCKED position.
- Vehicle Power Mode state - OFF
- Disconnect the electrical connector: X98 Battery Charger Coupler
- Test for less than 5 ohms between the test points:
- Low Reference circuit terminal X2-11 & Ground - With K28/K20
- Low Reference circuit terminal X2-12 & Ground - With K2W
- If 5 ohms or greater
- Disconnect the appropriate electrical connector: K16 Battery Energy Control Module
- Test for less than 2 ohms between the test points:
- Low Reference circuit terminal X2-11 @ Component harness & The other end of the circuit @ Control module harness - With K28/K20
- Low Reference circuit terminal X2-12 @ Component harness & The other end of the circuit @ Control module harness - With K2W
- If 2 ohms or greater - Repair the open/high resistance in the circuit.
- If less than 2 ohms - Replace the component: K16 Battery Energy Control Module
- Go to next step: If less than 5 ohms
- Vehicle Power Mode state - Service/Run
- Test for 4.8 to 5.2 V between the test points:
- Signal circuit terminal X2-10 @ Component harness & Ground - With K28/K20
- Signal circuit terminal X2-11 @ Component harness & Ground - With K2W
- If less than 4.8 V
- Vehicle Power Mode state - OFF
- Disconnect the appropriate electrical connector: K16 Battery Energy Control Module
- Test for infinite resistance between the test points:
- Signal circuit terminal X2-10 @ Component harness & Ground - With K28/K20
- Signal circuit terminal X2-11 @ Component harness & Ground - With K2W
- If less than infinite resistance - Repair the short to ground on the circuit.
- Go to next step: If infinite resistance
- Test for less than 2 ohms between the test points: The appropriate Signal circuit terminal @ Component harness & The other end of the circuit @ Control module harness
- If 2 ohms or greater - Repair the open/high resistance in the circuit.
- If less than 2 ohms - Replace the component: K16 Battery Energy Control Module
- If greater than 5.2 V
- Vehicle Power Mode state - OFF
- Disconnect the appropriate electrical connector: K16 Battery Energy Control Module
- Vehicle Power Mode state - Service/Run
- Test for less than 1 V between the test points:
- Signal circuit terminal X2-10 @ Component harness & Ground - With K28/K20
- Signal circuit terminal X2-11 @ Component harness & Ground - With K2W
- If 1 V or greater - Repair the short to voltage on the circuit.
- If less than 1 V - Replace the component: K16 Battery Energy Control Module
- Go to next step: If between 4.8 and 5.2 V
- Test or replace the component: X98 Battery Charger Coupler
RENDER: 1.0x
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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.