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Circuit/System Testing

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 OFF, disconnect the harness connector at the B254 Rear Compartment Lid Position Sensor, ignition ON.
  2. Test for greater than 10 V between the 12 V reference circuit terminal A and ground.
    • If less than 10 V 
    1. Ignition OFF, disconnect the harness connector at the K23 Folding Top Control Module.
    2. Test for infinite resistance between the 12 V reference circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    3. Test for less than 2 Ω in the 12 V reference circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K23 Folding Top Control Module.
    • Go to next step: If 10 V or greater 
  3. Disconnect the X7 harness connector at K23 Folding Top Control Module.
  4. Test for less than 1 V between the B254 Rear Compartment Lid Position Sensor 12 V reference circuit terminal A and ground.
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • Go to next step: If less than 1 V 
  5. Test or replace the B254 Rear Compartment Lid Position Sensor.
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