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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 413 (Bumpers And Fascias) >> Diagnostic Information and Procedures >> DTC P059F or P151E: Active Grille Air Shutter >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition On/Vehicle in Service Mode.
  2. Verify DTC U1510 is not set.
    • If DTC U1510 is not set 
  3. Verify the active grille air shutter position parameter changes from 0% (fully open) to 100% (fully closed) when using the scan tool ECM Active Grille Air Shutter Position control function.
    • If the louvers at the front bumper do not open and close 

      Refer to Circuit/System Testing.

    • If the louvers at the front bumper open and close 
  4. Verify none of the following conditions are present:
    • Snow or ice packed in the front fascia which prevents the louvers from moving.
    • Debris or foreign objects which prevent the louvers from moving.
    • If any of the conditions are present 

      Clear any snow, ice or foreign objects from the front grille.

    • If none of the conditions are present 
  5. All OK
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