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Home >> Cadillac >> 2004 >> XLR >> Repair and Diagnosis >> Brakes >> Antilock Brake System, Traction Control System & Stability Control System >> Diagnostic Information and Procedures >> DTC C0252: Active Brake Control Sensor Uncorrelated >> Test Description

Test Description

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

  1. 2:  Perform the Steering Position Sensor Test in order to verify that the steering wheel position sensor (SWPS) is operating properly.
  2. 3:  Verify that the Lateral Accelerometer Signal parameter is within the valid range.
  3. 4:  Verify that the Yaw Rate Signal parameter is within the valid range.
DTC C0252

Step Action Values Yes No
Schematic Reference: ABS Schematics 
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2 
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With the scan tool, perform the Steering Position Sensor Test.
Did the SWPS pass the test?		 - Go to Step 3  Go to Step 7 
3  With a scan tool, observe the Lateral Accelerometer Signal parameter in the VSES data list.
Does the scan tool display within the specified range?		 2.3-2.7 V Go to Step 4  Go to Step 8 
4  With a scan tool, observe the Yaw Rate Signal parameter in the VSES data list.
Does the scan tool display within the specified range?		 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
IMPORTANT: Perform the setup procedure for the EBCM. An unprogrammed EBCM will result in the following conditions:
  • Inoperative or poorly functioning system operations
  • The EBCM may set DTCs
Replace the EBCM. Refer to Electronic Brake Control Module Replacement .Did you complete the repair?		 - Go to Step 9  -
7 Replace the steering wheel position sensor (SWPS). Refer to Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement in Steering Wheel and Column.
Did you complete the replacement?		 - Go to Step 9  -
8 Replace the yaw rate/lateral accelerometer sensor. Refer to Yaw Rate Sensor/Lateral Accelerometer Replacement .
Did you complete the replacement?		 - 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
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