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Circuit/System Testing

    NOTE:

    Use the schematic to identify the control modules B+, ignition, ground, communication enable and serial data circuit terminals.

  1. Vehicle OFF, disconnect the X1 harness connector at the T18 battery charger.
  2. Vehicle in Service Mode, verify that a test lamp illuminates between the high voltage energy management communication enable circuit terminal G X1 and ground.
    • If the test lamp does not illuminate, test the circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the K114B hybrid powertrain control module 2.
  3. Vehicle OFF, verify that a test lamp does not illuminate between the high voltage energy management communication enable circuit terminal G X1 and ground.
    • If the test lamp illuminates, test the circuit for a short to voltage. If the circuit tests normal, replace the K114B hybrid powertrain control module 2.
  4. If all circuits test normal, replace the T18 battery charger.
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