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Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Hybrid/EV Control System) >> Diagnostic Information and Procedures >> DTC P0C28: Auxiliary Transmission Fluid Pump High Current >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Perform the High Voltage Disabling procedure for servicing the T6 Power Inverter Module or T12 Transmission.
    WARNING:

    Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

    The High Voltage Disabling procedure will perform the following tasks:

    • Identify how to disable high voltage.
    • Identify how to test for the presence of high voltage.
    • Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

    Failure to follow the procedures exactly as written may result in serious injury or death.

  2. Remove the T6 Power Inverter Module cover. Refer to Drive Motor Power Inverter Module Cover Replacement .
  3. Disconnect the G5 transmission fluid pump high voltage AC 3 phase circuit harness connector at the rear of the T6 Power Inverter Module.
  4. Test for infinite resistance between each of the AC circuit terminals listed below and ground for each phase of the G5 Transmission Fluid Pump - Electric/Auxiliary:
    • Terminal 3 phase U
    • Terminal 2 phase V
    • Terminal 1 phase W
    • If less than infinite resistance 

      Replace the G5 Transmission Fluid Pump - Electric/Auxiliary.

    • If infinite resistance 
  5. Replace the T6 Power Inverter Module.
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