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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 228 (Vehicle Access System - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P257D-P257F >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition - On/Vehicle - In Service Mode
  2. Operate the component: Open and close the hood.

    Verify the scan tool parameter: Engine Hood Switch = Open & Closed

    • If the parameter state does not change 

      Refer to: Circuit/System Testing

    • Go to next step: If the parameter state changes 
  3. A fault is not currently present and may be an intermittent condition
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