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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 Right Turn Signal Switch and Left Turn Signal Switch parameters change between Active and Inactive while cycling the turn signal switch between the right and left positions.
    • If the parameters do not change 

      Refer to Turn Signal/Multifunction Switch Malfunction.

    • Go to next step: If the parameters change 
  3. Verify the left front turn signal lamps turn ON and OFF while commanding the Left Front Turn Signal Lamp ON and OFF with a scan tool.
    • If the left front turn signal lamps do not turn ON and OFF 

      Refer to Turn Signal Lamps Malfunction.

    • Go to next step: If the left front turn signal lamps turn ON and OFF 
  4. Verify the right front turn signal lamps turn ON and OFF while commanding the Right Front Turn Signal Lamp ON and OFF with a scan tool.
    • If the right front turn signal lamps do not turn ON and OFF 

      Refer to Turn Signal Lamps Malfunction.

    • Go to next step: If the right front turn signal lamps turn ON and OFF 
  5. Verify the left rear turn signal lamps turn ON and OFF while commanding the Left Stop Lamp ON and OFF with a scan tool.
    • If the left rear turn signal lamps do not turn ON and OFF 

      Refer to Stop Lamps Malfunction.

    • Go to next step: If the left rear turn signal lamps turn ON and OFF 
  6. Verify the right rear turn signal lamps turn ON and OFF while commanding the Right Stop Lamp ON and OFF with a scan tool.
    • If the right rear turn signal lamps do not turn ON and OFF 

      Refer to Stop Lamps Malfunction.

    • Go to next step: If the right rear turn signal lamps turn ON and OFF 
  7. Verify the left auxiliary turn signal lamp turns ON and OFF when commanding the E4AJ Turn Signal Lamp - Auxiliary Left ON and OFF with a scan tool.
    • If the left auxiliary turn signal lamp does not turn ON and OFF 

      Refer to Turn Signal Lamps Malfunction - Auxiliary.

    • Go to next step: If the left auxiliary turn signal lamp turns ON and OFF 
  8. Verify the right auxiliary turn signal lamp turns ON and OFF when commanding the E4AK Turn Signal Lamp - Auxiliary Right ON and OFF with a scan tool.
    • If the right auxiliary turn signal lamp does not turn ON and OFF 

      Refer to Turn Signal Lamps Malfunction - Auxiliary.

    • Go to next step: If the right auxiliary turn signal lamp turns ON and OFF 
  9. Verify the left and right auxiliary turn signal lamps turn ON and OFF when opening and closing the rear compartment lid.
    • Go to next step: If the left and right auxiliary turn signal lamps turn ON and OFF 
  10. Verify the left and right turn signal indicators turn ON and OFF while commanding the All Indicators Test ON and OFF with a scan tool.
    • If the left or right turn signal indictors do not turn ON and OFF 

      Refer to Turn Signal Indicators Malfunction.

    • Go to next step: If the left and right turn signal indictors turn ON and OFF 
  11. All OK.
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