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Home >> Chevrolet >> 2021 >> Bolt EV Premier >> Repair and Diagnosis >> Electrical >> Body Electrical >> Plug-In Charging >> Diagnostic Information and Procedures >> Plug-In Charging Indicator Malfunction >> Circuit/System Testing
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Circuit/System Testing

  1. Vehicle OFF, disconnect the harness connector at the B305 Ambient Light/Sunload Sensor and Battery State of Charge Indicator.
  2. Test for less than 10 Ω between the low reference terminal 1 and ground.
    • If 10 Ω or greater 

      Repair the open/high resistance in the circuit.

    • Go to next step: If less than 10 Ω 
    3. NOTE:

    If the drive motor battery charger cable is connected. The drive motor battery charger cable must be disconnected for more than 10 s before performing the next step.

  3. Connect a test lamp between the yellow LED control circuit terminal 4 and ground.
  4. Verify the test lamp does not illuminate.
    • If the test lamp illuminates 
    1. Disconnect the X2 harness connector at the K114B Hybrid/EV Powertrain Control Module 2.
    2. Test for less than 1 V between the control circuit and ground.
      • If 1 V or greater, repair the short to voltage in the circuit.
      • If less than 1 V, replace the K114B Hybrid/EV Powertrain Control Module 2.
    • Go to next step: If the test lamp does not illuminate 
  5. Connect the drive motor battery charger cable.
  6. Verify that the test lamp illuminates or flashes in the first 5 s of connecting the drive motor battery charger cable.
    • If the test lamp does not illuminate 
    1. Disconnect the X2 harness connector at the K114B Hybrid/EV Powertrain Control Module 2.
    2. Test for infinite resistance between the control circuit and ground
      • If less than infinite resistance, repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    3. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K114B Hybrid/EV Powertrain Control Module 2.
    • Go to next step: If the test lamp illuminates 
  7. Disconnect the drive motor battery charger cable for at least 10 s. Connect a test lamp between the green LED control circuit terminal 3 and ground.
  8. Verify test lamp does not illuminate.
    • If the test lamp illuminates 
    1. Disconnect the X2 harness connector at the K114B Hybrid/EV Powertrain Control Module 2.
    2. Test for less than 1 V between the control circuit and ground.
      • If 1 V or greater, repair the short to voltage in the circuit.
      • If less than 1 V, replace the K114B Hybrid/EV Powertrain Control Module 2.
    • Go to next step: If the test lamp does not illuminate 
  9. Connect the drive motor battery charger cable.
  10. Verify that the test lamp illuminates or flashes within 25 s of connecting the drive motor battery charger cable.
    • If the test lamp does not illuminate 
    1. Disconnect the X2 harness connector at the K114B Hybrid/EV Powertrain Control Module 2.
    2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    3. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K114B Hybrid/EV Powertrain Control Module 2.
    • Go to next step: If the test lamp illuminates 
  11. Replace the B305 Ambient Light/Sunload Sensor and Battery State of Charge Indicator.
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