2010 Cadillac CTS Sedan AWD V6-3.6L Page 680
* Terminal 25
* Terminal 1
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuit Terminal 13 and ground.
瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. If all circuits test normal, replace the brake pressure modulator valve and verify DTC does not reset. If the DTC resets replace the EBCM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Brake Pressure Modulator Valve Replacement (CTS) (See: Brakes and Traction Control/Antilock Brakes / Traction Control
Systems/Hydraulic Control Assembly - Antilock Brakes/Service and Repair/Brake Pressure Modulator Valve Replacement)Brake Pressure
Modulator Valve Replacement (CTS-V) (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Hydraulic Control
Assembly - Antilock Brakes/Service and Repair/Brake Pressure Modulator Valve Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for EBCM replacement, setup, and programming
C0131
DTC C0131
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC C0131 01
- ABS Pressure Circuit Short to Battery
DTC C0131 06
- ABS Pressure Circuit Short to Ground or Open
DTC C0131 4B
- ABS Pressure Circuit Calibration Not Learned
DTC C0131 55
- ABS Pressure Circuit Expected Number of Transition/Events exceeded
DTC C0131 5A
- ABS Pressure Circuit Plausibility Failure
DTC C0131 0F
- ABS Pressure Circuit Erratic
Circuit/System Description
The electronic brake control module (EBCM) uses input from the brake pressure sensor for more accurate control during a Vehicle Stability
Enhancement System (VSES) event. The brake pressure sensor is part of the brake pressure modulator valve (BPMV).
Conditions for Running the DTC
* Ignition ON.
* Ignition voltage is greater than 8 volts.
Conditions for Setting the DTC
* Brake signal does not correlate to pressure signal.
* Signal is erratic and changes faster than physically allowed.
