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Home >> GMC >> 2022 >> Hummer EV >> Repair and Diagnosis >> Electrical >> Charging Systems >> Plug-In Charging System >> Diagnostic Information and Procedures >> DTC P0D91-P0D93 or P1C2F >> Circuit/System Testing
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Circuit/System Testing

  1. Vehicle Off.
  2. Disconnect the electrical connector: A110 Charge Port Housing
  3. Connect a test lamp between the test points: Control circuit terminal X2-12 & Control circuit terminal X2-13
  4. Vehicle On
  5. Perform the scan tool control function: Battery Charger Coupler Lock - Open/Close

    Verify the test lamp turns On.

    • If the test lamp does not turn On 
    1. Vehicle Off. Remove - Test Lamp
    2. Disconnect the electrical connector: K16A Battery Energy Control Module 1
    3. Test for infinite resistance between the test points:
      • Control circuit terminal X2-13 @ Component harness & Ground
      • Control circuit terminal X2-12 @ Component harness & Ground
      • Control circuit terminal X2-13 @ Component harness & Control circuit terminal X2-12
      • If less than infinite resistance - Repair the short to ground on the circuit or Short between the circuits
      • Go to next step: If infinite resistance
    4. Test for less than 2 ohms between the test points:
      • Control circuit terminal X2-13 @ Component harness & Terminal X2-18 @ Control module harness
      • Control circuit terminal X2-12 @ Component harness & Terminal X2-17 @ Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K16A Battery Energy Control Module 1
    • If the test lamp turns On 

      Replace the component: X98 Battery Charger Coupler