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Home › Hummer › 2008 › H2 4D Utility Pickup › Repair and Diagnosis › Engine Mechanical › Starter › Battery, Charging System And Starting System › Diagnostic Information and Procedures › DTC P0562 › Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector of the ECM. Verify that there is less than 1.0 ohm between the ground circuits and the negative battery terminal.
    • If greater than the specified value, test the ground circuit for an open/high resistance.
  2. Ignition ON, test for 11-14 volts between the battery positive voltage and the ground circuits of the ECM.
    • If not within the specified range, test the battery positive voltage circuits for a short to ground or an open/high resistance.
  3. If all circuits test normal, test or replace the ECM.
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