C0131

DTC C0131

Diagnostic Instructions

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



DTC Descriptor
DTC C0131 01
- ABS Pressure Circuit Short to Battery


DTC C0131 06
- ABS Pressure Circuit Short to Ground or Open


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.


Conditions for Running the DTC

* The ignition is 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.



Action Taken When the DTC Sets

* The Traction Control indicator turns ON.
* The driver information center (DIC) displays the Service Stability System message.



Conditions for Clearing the DTC

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



Reference Information
Schematic Reference

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

Component Connector End Views (Connector Views)
Description and Operation

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

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for EBCM


Circuit/System Testing

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

• If brake lamps do not operate properly, refer to Symptoms - Lighting (- Symptoms - Lighting) .

2. Replace the brake pressure modulator valve (BPMV) assembly.

• If the DTC resets, replace the EBCM.




Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

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