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

Circuit/System Description

The electronic brake control module (EBCM) uses inputs from the brake pedal position sensor for more accurate control during a Vehicle Stability Enhancement System (VSES) event.

Conditions for Running the DTC

* System Voltage is above 9.6 volts.
* The vehicle speed is greater than 40 km/h (24 mph).

Conditions for Setting the DTC

* Sensor supply voltage is less than 4.5 volts or greater than 5.3 volts for more than 1 sec.
* Sensor signal voltage is less than 0.12 volts or greater than 3.2 volts for more than 1 sec.
* The EBCM sees the brake pedal is applied, and does not see the brake pressure increase when stopping.
* The EBCM sees the brake pressure increase, and does not see the brake pedal is applied when stopping.
* Signal is erratic.

Action Taken When the DTC Sets

If equipped, the following actions occur:

* The EBCM disables the Antilock Brake System (ABS), Traction Control System (TCS) Vehicle Stability Enhancement System VSES for the duration of the ignition cycle.
* The Traction Control indicator turns ON.
* The ABS indicator turns ON.
* The red brake warning indicator could turn 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.
* The EBCM automatically clears the history DTC when a current DTC is not detected in 100 ignition 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 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 Verification

1. Ignition ON, observe the scan tool BPP parameter while applying and releasing the brake pedal. The reading should change between Applied and Released.
2. Verify that DTC C0277 or C0278 is not set.

• If either DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle

3. Replace the BPMV and verify DTC does not reset. If DTC reset, replace the EBCM.

Repair Instructions

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

* Brake Pressure Modulator Valve Replacement Brake Pressure Modulator Valve Replacement
* Control Module References Programming and Relearning for EBCM replacement, setup, and programming.