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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 Always On >> 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 DTC is set 
  3. Verify the scan tool parameters listed below display OFF:
    • Cooling Fan Relay 1 Command
    • Cooling Fan Relays 2 and 3 Command
    • If both scan tool parameters display OFF 
  4. Verify that the fans are not activated.
    • If a fan is operating 

      Refer to Circuit/System Testing.

    • If both fans are OFF 
  5. All OK