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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> Brakes >> Antilock Brake System, Traction Control System & Stability Control System >> Diagnostic Information and Procedures >> DTC C0186 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the yaw rate sensor/lateral accelerometer connector.
  2. Ignition OFF, test for less than 1 ohm of resistance between the low reference circuit and ground.
    • If greater than 1 ohm, test the low reference circuit and the EBCM ground circuit for a short to voltage or an open/high resistance. If the circuits test normal, replace the EBCM.
  3. Test the lateral accelerometer signal circuit, the 5-volt reference circuit, and the low reference circuit for an open/high resistance or a short to voltage or ground.
    • If all circuits test normal, replace the yaw rate sensor/lateral accelerometer, and clear the yaw rate sensor offset value in the EBCM.
    • If the DTC sets again after replacing the yaw rate sensor/lateral accelerometer, replace the EBCM.
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