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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 X2 harness connector at the K182 Parking Assist Control Module.
  2. Test for infinite resistance between the 12 V reference circuit terminal 4 and ground.
    • If less than infinite resistance 
    1. Ignition OFF, disconnect the harness connector at each of the B306 Parking Assist Sensors.
    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.
      • If less than 2 Ω, replace the appropriate B306 Parking Assist Sensor.
    • Go to next step: If infinite resistance 
  3. Connect the X2 harness connector at the K182 Parking Assist Control Module, ignition ON.
  4. Verify DTC B1405 is not set.
    • If DTC B1405 is set. 
    1. Ignition OFF, disconnect the harness connector at each of the B306 Parking Assist Sensors.
    2. Verify DTC B1405 is not set.
      • If DTC B1405 is set.

        Replace the K182 Parking Assist Control Module.

      • Go to next step: If DTC B1405 is not set.
    3. Verify DTC B1405 is not set while connecting the harness connector at each B306 Parking Assist Sensor, one at a time.
    • If DTC B1405 does set

      Replace the B306 Parking Assist Sensor that was connected immediately before DTC B1405 set.

    • Go to next step: If DTC B1405 does not set.
  5. All OK.
    • Go to next step: If DTC B1405 is not set. 
  6. All OK.
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