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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System >> Diagnostic Information and Procedures >> Cooling Fan Inoperative >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify that DTC P0480, P0481, P0691, P0692, P0693, or P0694 is not set.
    • If no DTCs is set 
  3. Verify that both cooling fans turn ON and OFF and operate at low and high speed, when commanding the appropriate cooling fan Relays ON and OFF with a scan tool.
    • If a cooling fan does not operate 

      Refer to Circuit/System Testing

    • If both cooling fans operate 
  4. All OK.
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