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Circuit/System Verification

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify the scan tool Front Leveling Position Sensor Voltage parameter is between 0.5 and 4.9 V.
    • If the parameter is not between 0.5 and 4.9 V 

      Refer to Headlamp Leveling Sensor Malfunction.

    • Go to next step: If the parameter is between 0.5 and 4.9 V 
  3. Verify the scan tool Rear Leveling Position Sensor Voltage parameter is between 0.5 and 4.9 V.
    • If the parameter is not between 0.5 and 4.9 V 

      Refer to Headlamp Leveling Sensor Malfunction.

    • Go to next step: If the parameter is between 0.5 and 4.9 V 
  4. Verify the left and right headlamps operate to the UP and DOWN positions when commanding the Right and Left Headlamp Vertical Motor controls UP and DOWN with a scan tool.
    • If the left and right headlamps do not operate UP and DOWN 

      Refer to Headlamp Leveling Actuator Malfunction

    • Go to next step: If the left and right headlamps operate UP and DOWN 
  5. All OK.
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