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HOMESERVICE MANUALSBUICK2006TERRAZA CXL, 3.5 L, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 128 (ANTILOCK BRAKE SYSTEM WITH TRACTION CONTROL SYSTEM & STABILITY CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC C0187TEST DESCRIPTION
2006 Buick Terraza CXL, 3.5 L, AWD

Test Description

2006 Buick Terraza CXL, 3.5 L, AWDSECTION Test Description
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  This step checks to see if steering angle sensor is centered.
  2. 3:  This step checks for specified voltage on the lateral accelerometer signal circuit.
  3. 4:  This step checks for specified voltage on the yaw rate signal circuit.
DTC C0187

Step Action Value(s) Yes No
Schematic Reference: ABS Schematics 
Connector End View Reference: ABS Connector End Views 
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2  Perform the steering angle sensor centering procedure. Refer to Steering Angle Sensor Centering Procedure .
Did you successfully complete the centering procedure?		   Go to Step 3  Go to Step 7 
3 
  1. Turn OFF the ignition.
  2. Disconnect the electronic brake control module (EBCM) connector.
  3. Install the J 39700  Breakout Box with the J 39700-530  Cable Adapter between the EBCM and the EBCM harness connector. See Special Tools .
  4. Turn the ignition ON, with the engine OFF.
  5. Using the DMM, measure the voltage between pin 10 and pin 15 of the J 39700  . See Special Tools .
Is the voltage within the specified value?		 2.3-2.7 V Go to Step 4  Go to Step 8 
4  Using the DMM, measure the voltage between pin 26 and pin 15 of the J 39700  . See Special Tools .
Is the voltage within the specified value?		 2.3-2.7 V Go to Step 5  Go to Step 8 
5
  1. Use the scan tool in order to clear the DTCs.
  2. Perform the Diagnostic Test Drive. Refer to Diagnostic Test Drive .
Does the DTC reset?		 - Go to Step 6  Go to Diagnostic Aids
6 Replace the EBCM. Refer to Control Module References for replacement, setup and programming.
Did you complete the replacement?		 - Go to Step 9  -
7 Replace the steering angle sensor. Refer to Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement .
Did you complete the replacement?		 - Go to Step 9  -
8 Replace the vehicle yaw/lateral accelerometer sensor. Refer to Yaw Rate Sensor/Lateral Accelerometer Replacement .
Did you complete the repair?		 - Go to Step 9  -
9
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 - Go to Step 2  System OK
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.