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Circuit/System Testing

    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.

  1. Vehicle OFF, disconnect the X2 harness connector at the hybrid powertrain control module 2.
  2. Vehicle ON, verify that the scan tool Hybrid/EV Contactor System Circuit Request Circuit Command parameter is 100 percent.
    • If not the specified value, test the control circuit terminal 53 for a short to ground. If the circuit tests normal, replace the T6 power inverter module.
  3. Install a 3 A fused jumper wire between the control circuit terminal 53 and ground. Verify that the scan tool Hybrid/EV Contactor System Circuit Request parameter is 0 percent.
    • If not the specified value, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the T6 power inverter module.
  4. If all circuits test normal, replace the hybrid powertrain control module 2.
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