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
- Traction Control System Pressure Circuit Malfunction

DTC C0131 5A
- Traction Control System Pressure Circuit Not Plausible

Circuit/System Description

The electronic brake control module monitors the brake pressure sensor which is integral to the brake pressure modulator. The body control module monitors the brake pedal position signal when the brake pedal is applied and sends a serial data message to the electronic brake control module indicating the brake pedal position. The electronic brake control module compares the brake pressure to the actual brake pedal position and uses this information for vehicle stability control.

Conditions for Running the DTC

* Ignition ON begins the initialization of the brake system power-up self test.

* Drive the vehicle at speeds greater than 16 km/h (10 MPH) to complete the active brake system test.

Conditions for Setting the DTC

C0131 00

The electronic brake control module detects the brake pressure is out of the specified range.

C0131 5A

* The brake pressure sensor offset is out of the specified range.

* The electronic brake control module detected an invalid or erratic brake pressure.

* The brake pressure is not plausible with the vehicle acceleration or deceleration.

Action Taken When the DTC Sets

* The traction/stability control indicator turns ON.

* The electronic brake control module disables the traction/stability for the duration of the ignition cycle.

Conditions for Clearing the DTC

* The DTC clears when the diagnostic runs and passes.

* The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

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 Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.

2. Apply and release brake pedal. Verify the brake stop lamps operate properly.

• If the brake stop lamps do not operate properly
Refer to Symptoms - Lighting Symptoms - Lighting.

• If the brake stop lamps operate properly

3. Verify that DTC C0131 is not set.

• If the DTC is set

1. Perform the Brake Pressure Modulator Valve Pressure Sensor Calibration Testing and Inspection.

2. Verify the DTC does not set.

• If the DTC sets, replace the K17 Electronic Brake Control Module with the Brake Pressure Modulator.

• If the DTC does not set

3. All OK.

• If the DTC is not set

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Brake Pressure Modulator Valve Replacement Service and Repair

* Control Module References Control Module References for Electronic Brake Control Module replacement, programming and setup