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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 207 (Antilock Brake System) >> Diagnostic Information and Procedures >> DTC C0186, C018B, C0196, C019B, C027E, or C0287: Lateral Acceleration Sensor Signal/Yaw Rate Signal/Longitudinal Acceleration Sensor Signal (With UGN) >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify DTC C0186 5A, C018B 5A, C0196 5A, C019B 5A, C027E 5A, C0287 4B, or C0287 5A is not set.
    • If any of the DTCs are set 
    1. Perform the Vehicle Yaw Sensor Learn  procedures to complete the learn.
    2. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.
      • If the DTC sets, replace the K17 Electronic Brake Control Module.
      • If the DTC does not set
    3. All OK.
    • If none of the DTCs are set 
  3. Verify the B119 Multi-axis Acceleration Sensor is installed correctly.
    • If loose or incorrect installation 

      Correct the installation of the component.

    • If installed correctly 
  4. Ignition OFF, all vehicle system OFF, and the scan tool disconnected, disconnect the harness connector at the B119 Multi-axis Acceleration Sensor. It may take up to 2 min for all vehicle systems to power down.
  5. Test for less than 10 Ω between the ground circuit terminal 6 and ground.
    • If 10 Ω or greater 
    1. Ignition OFF.
    2. Test for less 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • If less than 10 Ω 
  6. Ignition ON.
  7. Verify a test lamp illuminates between the ignition circuit terminal 5 and ground.
    • If the test lamp does not illuminate 
    1. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module.
    2. Test for infinite resistance between the ignition circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the ignition circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K17 Electronic Brake Control Module.
    • If the test lamp illuminates 
  8. Replace the B119 Multi-axis Acceleration Sensor.
  9. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.
    • If the DTC sets 

      Replace the K17 Electronic Brake Control Module.

    • If the DTC does not set 
  10. All OK.
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