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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.

Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
  • Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
  • Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
    • Visually and functionally inspect the gloves before use.
    • Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or not.

Failure to follow the procedures exactly as written may result in serious injury or death.
  1. Ignition OFF, disable the high voltage. Refer to High Voltage Disabling .
  2. Disconnect charger cord set from vehicle charge receptacle and close the charge port door.
  3. Disconnect the X2 harness connector at the K114B hybrid powertrain control module 2.
  4. Ignition ON, test for less than 1.0 V between the signal circuit terminal 8 X2 and ground.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K114B hybrid powertrain control module 2.
  5. Test for greater than 100 Ω between the signal circuit terminal 8 X2 and ground.
    • If less than the specified range, test the signal circuit for a short to ground. If the circuit tests normal, replace the K114B hybrid powertrain control module 2.
  6. Test for less than 10 Ω between the signal circuit terminal 8 X2 K114B hybrid powertrain control module 2 and terminal B X98 hybrid battery charger receptacle.
    • If greater than the specified range, test the signal circuit for an open/high resistance.
  7. If all circuits test normal, replace the K114B hybrid powertrain control module 2.
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