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Home >> Chevrolet >> 2015 >> Volt >> Repair and Diagnosis (Single Page) >> Electrical >> Body Electrical >> Wiring Systems And Power Management - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P1EF6 or P1EF7: Battery Charger Control Module Ignition On/Start Switch Circuit >> Circuit/System Testing >> Hybrid Powertrain Control Module 2 Circuit Malfunction

Hybrid Powertrain Control Module 2 Circuit Malfunction

  1. Vehicle OFF, disconnect the X2 harness connector at the K114B Hybrid/EV Powertrain Control Module 2.
  2. Verify that a test lamp does not illuminate between the ignition circuit terminal 27 and ground.
    • If the test lamp illuminates 

      Repair the short to voltage on the ignition circuit.

    • If the test lamp does not illuminate 
  3. Vehicle in Service Mode.
  4. Verify a test lamp illuminates between the ignition circuit terminal 27 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Vehicle OFF.
    2. Test for less than 2 Ω in the ignition circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, refer to Power Mode Mismatch 
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Vehicle OFF, remove the test lamp.
    2. Test for infinite resistance between the ignition circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K114B Hybrid/EV Powertrain Control Module 2.
    • If the test lamp illuminates 
  5. Replace the K114B Hybrid/EV Powertrain Control Module 2.
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