C0131

DTC C0131
DTC Descriptor
DTC C0131 00
ABS Pressure Circuit No Additional Information

Diagnostic Fault Information

Important: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview

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
^ The ignition switch is in the ON position.
^ Ignition voltage is greater than 8 volts.

Conditions for Setting the DTC
^ Pressure signal does not correlate to estimated Pressure over time.
^ 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/TCS for the duration of the ignition cycle.
^ The Traction Control indicator turns ON.

Conditions for Clearing the DTC
^ The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
^ The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids
The pump motor is integral to the BPMV. The pump motor is not serviceable. Inspect the power and ground circuits proper connections.

Reference Information
Schematic Reference
ABS Schematics

Connector End View Reference
ABS Connector End Views

Electrical Information Reference
^ Circuit Testing
^ Connector Repairs
^ Testing for Intermittent Conditions and Poor Connections Component Tests and General Diagnostics
^ Wiring Repairs

Scan Tool Reference
Scan Tool Data List for EBCM

Circuit/System Verification
With scan tool installed, clear the DTC's then drive the vehicle in a straight line at a speed greater than 20 km/h (13 mph). If the DTC did not set as a current DTC see diagnostic aids.

Circuit/System Testing

Important: If DTC C0277 is set in Lighting Systems diagnosis it first.

1.
1. Apply and release brake pedal. Verify brake lamps operate properly. If brake lamps do not operate properly, refer to Symptoms - Lighting Systems. - Symptoms - Lighting
2. Replace the EBCM/BPMV assembly.

Repair Instructions

Important: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

^ Brake Pressure Modulator Valve (BPMV) Replacement
^ Electronic Brake Control Module Replacement
^ Control Module References for EBCM replacement, setup, and programming