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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 319 (Engine Cooling System) >> Diagnostic Information and Procedures >> Cooling Fan Always On (with HP2) >> Circuit/System Verification

Circuit/System Verification

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  1. Verify that the following DTCs are not set: P0480, P0481, P0482.
  2. Verify with a scan tool that the ECM is not commanding fan relay activation.
  3. Ignition ON, observe that the fans are not activated.
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