C0131

DTC C0131

Diagnostic Instructions

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

DTC Descriptors
DTC C0131 00
- Antilock Brake System (ABS) Traction Control System (TCS) Pressure Circuit

Circuit/System Description

The electronic brake control module (EBCM) monitors the internal brake pressure sensor signal, and correlates the reading with brake pedal position parameter.

Conditions for Running the DTC

* Ignition ON.
* System voltage is above 9 volts.
* The vehicle speed is greater than 40 km/h (24 mph).

Conditions for Setting the DTC

* A short to voltage, a short to ground, or an open high resistance is detected with the internal brake pressure sensor.
* Brake pedal signal does not correlate to brake pressure signal.
* Signal is erratic.

Action Taken When the DTC Sets

* The EBCM disables the VSES for the duration of the ignition cycle.
* A driver information center message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC

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

Reference Information
Schematic Reference

Antilock Brake System Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Description and Operation

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

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

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Testing

1. Verify that DTC C0277, C0297, B3445 or B3884 is not set.

• If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code (DTC) List - Vehicle).

2. Ignition ON, observe the scan tool EBCM, BPP Signal parameter. The parameter should be Released when the brake pedal is not applied, and change to Applied when the brake pedal is applied.

• If not within the specified value, perform the scan tool BCM, BPP Sensor Calibration procedure. Refer to Brake Pedal Position Sensor Calibration (). If the DTC resets, replace the brake pedal position sensor.

3. Replace the brake pressure modulator valve assembly and verify the DTC does not reset. If the DTC resets, replace the EBCM.

Repair Instructions

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

* Brake Pedal Position Sensor Replacement ()
* Brake Pressure Modulator Valve Replacement (Brake Pressure Modulator Valve Replacement)
* Control Module References (Programming and Relearning) for EBCM replacement, programming and setup