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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 338 (Lighting System - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> Headlamp Leveling Malfunction (Automatic) >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition on/vehicle in service mode.
  2. Verify there are no related DTCs set.
    • Go to next step: If no related DTCs are set 
  3. Ignition/vehicle off for at least 30 s.
  4. Verify both headlight low beams move up and down when turning the ignition back on/vehicle in service mode.
    • If the headlights do not move up and down when turning the ignition on/vehicle in service mode 

      Refer to: Circuit/System Testing - Headlamp Assembly Malfunction

    • If the headlights move up and down when turning the ignition on/vehicle in service mode 

      Refer to: Circuit/System Testing - Suspension Position Sensor Malfunction

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