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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 196 (Engine Cooling System) >> Diagnostic Information and Procedures >> Cooling Fan Inoperative (w/o LFA) >> Circuit/System Verification

Circuit/System Verification

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  1. Verify that the following DTCs are not set: P0480 or P0481.
    • If either of the DTCs is set, repair the DTC first.
  2. Ignition ON, command high and low speed fans ON and OFF with a scan tool. Observe to verify that the fans turn ON and OFF when changing between the commanded states.
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