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 4B

-
Traction Control System Pressure Circuit Calibration Not Learned

DTC C0131 5A

-
Traction Control System Pressure Circuit Not Plausible

Circuit/System Description

The brake pressure sensor is integral to the brake pressure modulator valve assembly. The electronic brake control module monitors the brake pressure sensor supply voltage and the signal voltage. The EBCM uses inputs from the body control module, the brake pedal position sensor and the brake pressure sensor located in the brake pressure modulator valve for more accurate control during a vehicle stability event.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

C0131 00

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

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

C0131 4B

The brake pressure sensor is not calibrated.

C0131 5A

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

* The brake pressure sensor signal is not plausible.

Action Taken When the DTC Sets

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

* The traction control/stability control-active indicator turns ON.

Conditions for Clearing the DTC

* A current DTC clears when the diagnostic runs and passes.

* The electronic brake control will turn OFF the indicator in the next ignition cycle.

* The history DTC will clear after 40 consecutive fault-free drive 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 Sunshade - Left

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

Note:
Diagnose all other stop lamp DTCs or Symptoms prior to performing this diagnostic procedure.

1. Verify that DTC C0131 4B is not set.

• If the DTC is set

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

• If the DTC is not set

2. Verify the scan tool Brake Pressure Sensor parameter changes from 0 V to 1 V when the brake pedal is applied.

• If the Brake Pressure Sensor parameter does not change

1. Replace the Q5 brake pressure modulator valve assembly.

2. Operate the vehicle under the conditions for setting the DTC, the DTC should not set.

• If the DTC sets, replace the K17 electronic brake control module.

• If the DTC does not set.

3. All OK.

• If the Brake Pressure Sensor parameter changes

3. All OK.

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 electronic brake control module replacement, programming and setup