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Circuit/System Testing

NOTE:

Perform Circuit/System Verification before 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. Perform the procedure: High Voltage Disabling for servicing the T6 Power Inverter Module cable connections.
  2. Remove the 3-phase cable assembly from the T6 Power Inverter Module. Refer to Drive Motor Power Inverter Module 3-Phase Cable Replacement .
  3. Test for infinite resistance between each of the AC circuit terminals listed below and ground for each phase of the M15 Drive Motor:
    • X3 terminal 3 phase U
    • X3 terminal 2 phase V
    • X3 terminal 1 phase W
    • If less than infinite resistance 
    1. Disconnect the 3-phase cable assembly from the transmission. Refer to Drive Motor Power Inverter Module 3-Phase Cable Replacement .
    2. Test for infinite resistance between the AC circuit terminal and ground for each phase of the M15 Drive Motor:
      • X3 terminal 3 phase U
      • X3 terminal 2 phase V
      • X3 terminal 1 phase W
      • If less than infinite resistance - Replace the component: 3-phase cable assembly.
      • If infinite resistance - Replace the component: M15 Drive Motor Stator
    • Go to next step: If infinite resistance for all AC circuits 
  4. Replace the component: T6 Power Inverter Module
  5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  6. Verify the DTC does not set.
    • If the DTC sets 

      Replace the component: M15 Drive Motor Stator.

    • Go to next step: If the DTC does not set 
  7. All OK.
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