C0131

DTC C0131

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* 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/TCS System Pressure Circuit Malfunction

DTC C0131 3A
- ABS/TCS Pressure Circuit Incorrect Component Installed

DTC C0131 5A
- ABS/TCS Pressure Circuit Plausibility Failure

Diagnostic Fault Information





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 switch is in the ON position.
* Ignition voltage is greater than 9.5 volts.

Conditions for Setting the DTC

* Internal pressure sensor line fault.
* 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.
* After replacing the brake pressure sensor, a calibration procedure is required with a scan tool.

Action Taken When the DTC Sets

* The EBCM disables the Antilock Brake System (ABS)/Traction Control System/(TCS) and VSES for the duration of the ignition cycle.
* The ABS/TCS and stabilitrak indicator turns ON.
* The Service Traction Control, and stabilitrak displayed on the DIC.

Conditions for Clearing the DTC

* The condition for 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 brake fluid pressure sensor is integral to the BPMV/EBCM. The brake fluid pressure sensor is not serviceable. After replacing the BPMV, and the DTC resets as a current code, it may be necessary to perform a brake pressure sensor calibration with the Tech 2 in ABS, special function.


Circuit/System Verification

With scan tool installed, clear the DTCs then drive the vehicle in a straight line at a speed greater than 20 km/h (13 mph). If the DTC did not set as a current DTC see diagnostic aids.

Circuit/System Testing

1. Apply and release brake pedal. Verify brake lamps operate properly. If brake lamps do not operate properly, refer to.
2. Test the stop lamp supply voltage circuit for a short to voltage, short to ground, an open or high resistance.

* If the stop lamp circuit tests normal, replace the EBCM/BPMV assembly.

Repair Instructions

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

* Brake Pressure Modulator Valve Replacement (JD9, JF3, JF7) Brake Pressure Modulator Valve Replacement (JH6, JH7)
* Electronic Brake Control Module Replacement (JD9, JF3, JF7) Electronic Brake Control Module Replacement (JH6, JH7)
* Refer to Programming and Relearning for EBCM replacement setup and programming. Programming and Relearning