Antilock Brake System (With JL4)

DTC C0131 (With JL4)

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

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Antilock Brake System (ABS)/Traction Control System (TCS) Pressure Circuit Short to Battery

DTC C0131 06

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ABS/Traction Control System (TCS) Pressure Circuit Short to Ground or Open

DTC C0131 0F

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ABS/Traction Control System (TCS) Pressure Circuit Erratic

DTC C0131 55

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ABS/Traction Control System (TCS) Pressure Circuit Expected Number of Transition/Events Not Reached

DTC C0131 5A

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ABS/Traction Control System (TCS) Pressure Circuit Plausibility Failure

DTC C0131 61

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ABS/Traction Control System (TCS) Pressure Circuit Actuator Stuck

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 system (VSES) event.

Conditions for Running the DTC

* Ignition ON.

* Ignition voltage is greater than 10 volts.

Conditions for Setting the DTC

* Internal pressure sensor fault.

* Brake Signal does not correlate to Pressure Signal.

* Signal is erratic and changes faster than physically allowed.

Action Taken When the DTC Sets

* The EBCM disables the ABS/Traction Control System (TCS)/Vehicle Stability Enhancement System (VSES) for the duration of the ignition cycle.

* A DIC message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC

* The condition for 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 [1][2]Antilock Brakes / Traction Control Systems

Connector End View Reference

Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)

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 Testing

1. Apply and release brake pedal. Verify brake lamps operate properly.

• If brake lamps do not operate properly, refer to Symptoms - Lighting Symptoms - Lighting.

2. If all circuits test normal, replace the EBCM/brake pressure modulator valve (BPMV) assembly.

Repair Instructions

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

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

* Brake Pressure Modulator Valve Replacement (Without JL4) Brake Pressure Modulator Valve Replacement (Without JL4)Brake Pressure Modulator Valve Replacement (With JL4) Brake Pressure Modulator Valve Replacement (With JL4)