C0131

DTC C0131

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.



DTC Descriptors
DTC C0131 00
- ABS Pressure Circuit No Additional Information

DTC C0131 4B
- ABS Pressure Circuit Calibration Not Learned

DTC C0131 5A
- ABS Pressure Circuit Calibration Not Learned Plausibility Failure




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.


Conditions for Running the DTC

* The ignition is ON.
* Ignition voltage is greater than 9.5 volts.



Conditions for Setting the DTC

* Pressure signal does not correlate to estimated pressure over time.
* Brake signal does not correlate to pressure signal.
* Signal is erratic and changes faster than physically allowed.



Action Taken When the DTC Sets

The EBCM disables the VSES and TCS for the duration of the ignition cycle.


Conditions for Clearing the DTC

* The condition for setting the DTC is no longer present.
* The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.



Diagnostic Aids

* The pressure sensor is integral to the brake pressure modulator valve (BPMV). The pressure sensor is not serviceable.
* Inspect the brake pressure sensor contacts for proper connections.



Reference Information
Schematic Reference

Antilock Brake System Schematics ([1][2]Antilock Brakes / Traction Control Systems)
Connector End View Reference

Component Connector End Views
Description and Operation Reference

ABS Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing
* Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs
* Connector Repairs

Scan Tool Reference

Control Module References for scan tool information


Circuit/System Verification

1. Apply and release the brake pedal. Verify brake lamps operate properly.

• If brake lamps do not operate properly, refer to Symptoms - Lighting Systems

2. Verify DTC C0131 is not set..

• If the DTC is set, replace the brake pressure modulator valve (BPMV) and verify the DTC does not reset. If the DTC resets replace the EBCM.




Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

* Brake Pressure Modulator Valve Replacement (Service and Repair)
* Control Module References for EBCM replacement, setup, and programming