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Home › Chevrolet › 2013 › Volt › Repair and Diagnosis › Hybrid/Electric Powertrain › Electric Converters and Controllers › Hybrid/EV Control System › Diagnostic Information and Procedures › DTC P1EA9 › Circuit/System Testing

Circuit/System Testing

  1. Remove the B+ harness connector X4 at the K1 14V Power Module.
  2. Connect a test lamp between 12 volt C1 Battery positive terminal and the K1 14V Power Module connector X4 at the module.
  3. Vehicle ON, observe the Low-Voltage Circuit Voltage parameter in the 14V Power Module data list. The parameter should be within 0.5 volt of the actual 12-volt battery voltage.
  4. Verify the Low-Voltage Circuit Voltage parameter reading is within 0.5 V of the actual C1 Battery voltage.
    • If the voltage is not within the specified range 

      Replace the K1 14V Power Module.

    • If the voltage is within the specified range 
  5. Vehicle OFF, remove the positive terminal at the C1 Battery.
  6. Test for less than 1 Ω on the B+ circuit between the X4 connector and the battery positive terminal.
    • If 1 Ω or greater 

      Repair the open/high resistance in the circuit.

    • If less than 1 Ω 
  7. All OK
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