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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 Trunk Lid/Liftgate Window Exterior Unlatch Switch parameter changes between Active and Inactive when pressing and releasing the S46 Liftgate Handle Switch.
    • If the parameter does not change 

      Refer to Circuit/System Testing - Trunk Release Switch Inoperative

    • Go to next step: If the parameter changes 
  3. Verify the M30 Liftgate Latch functions when commanding the Trunk Lid Unlatch with a scan tool.
    • If the M30 Liftgate Latch does not function 

      Refer to Circuit/System Testing - Release Actuator Inoperative

    • Go to next step: If the M30 Liftgate Latch does function 
  4. All OK.
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