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 01
- ABS Pressure Circuit Short to Battery

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

DTC C0131 4B
- ABS Pressure Circuit Calibration Not Learned

DTC C0131 55
- ABS Pressure Circuit Expected Number of Transition/Events Exceeded

DTC C0131 5A
- ABS Pressure Circuit Not Plausible

DTC C0131 0F
- ABS Pressure Signal 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 event. The brake pressure sensor is part of the brake pressure modulator valve.

Conditions for Running the DTC

* Ignition ON.

* Ignition voltage is greater than 8 volts.

Conditions for Setting the DTC

* Brake signal does not correlate with the pressure signal.

* Signal is erratic and changes faster than physically allowed.

Actions Taken when the DTC Sets

* A driver information center message and/or a warning indicator may be displayed.

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

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 40 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 A/C Compressor Clutch

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. Verify DTC, C0277 or C0890 is not set.

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

2. Verify the brake pedal position sensor or the brake pedal is not binding causing residual brake pressure to be detected, while the brake lights operate properly.

• If a condition is found, repair or replace the applicable component.

3. Apply and release the brake pedal. Verify the brake lights operate properly.

• If the brake lights do not operate properly, refer to Symptoms - Lighting Symptoms - Lighting

4. Verify DTC, C0131 is not set.

• If DTC is set, replace the brake pressure modulator valve. If the DTC resets, replace the EBCM

Repair Instructions

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

* Brake Pressure Modulator Valve Replacement (CTS) Brake Pressure Modulator Valve Replacement (CTS)Brake Pressure Modulator Valve Replacement (CTS-V) Brake Pressure Modulator Valve Replacement (CTS-V)

* Control Module References Control Module References for EBCM replacement, programming and setup.