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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 463 (Engine Cooling System) >> Diagnostic Information and Procedures >> Cooling Fan Always On (without HP2) >> Circuit/System Verification

Circuit/System Verification

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  1. Verify that the following DTCs are not set: P0480 or P0481.
  2. Ignition ON, verify with a scan tool that the control module is not commanding fan activation.
  3. Ignition ON, observe that the fans are not activated.
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