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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 180 (Hybrid Energy Storage System) >> Diagnostic Information and Procedures >> DTC P1A0C or P1A0D >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
  1. Start the engine.
  2. Verify that DTCs P0A8D and P0A8E are not set.
  3. With a scan tool, monitor the control module voltage parameter in the BECM data display list. The voltage parameter should display between 12.0-15.5 volts.
    • If the voltage is less than the specified value, test the ignition voltage circuit for an open/high resistance connection, If all circuits test normal replace the drive motor generator battery control module.
    • If the voltage is more than the specified value, replace the drive motor generator battery control module.
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