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Home >> Hummer >> 2009 >> H2 4D Utility Pickup >> Repair and Diagnosis >> External Pages >> Different car >> Section 28 (Battery, Charging System And Starting System) >> Diagnostic Information and Procedures >> DTC C0900 >> Circuit/System Verification
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Circuit/System Verification

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  1. If the DTC is history, refer to Charging System Test .
  2. Start the engine, record the voltage at the battery terminals. Observe the battery voltage signal parameter in the EBCM data list. Voltages should not differ by more than 1 volt.
    • If more than 1 volt, replace the EBCM.
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