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Home >> Cadillac >> 2018 >> CT6 Plug-In >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Electric Converters and Controllers >> Hybrid/EV Control System >> Diagnostic Information and Procedures >> DTC P0AB9 >> Circuit/System Verification
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Circuit/System Verification

  1. Vehicle ON. Operate the hood release to open the hood. Depress and hold the accelerator pedal for more than 5 seconds. Under normal operation, the engine should start and run.
  2. Verify the engine starts and runs for at least 20 seconds.
    • If the engine fails to start and run for at least 20 seconds 

      Diagnose the engine and transmission systems. Perform the Engine Cranks But Does Not Run .

    • Go to next step: If the engine starts and runs for at least 20 seconds 
  3. Verify DTC P0AB9 is not set.
    • If the DTC is set 
    1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.
      • If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.
      • If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.
    2. Verify the DTC does not set.
      • If the DTC sets, replace the T6 Power Inverter Module.
      • Go to next step: If the DTC does not set.
    3. All OK
    • Go to next step: If the DTC is not set 
  4. All OK
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