C0131

DTC C0131

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) 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 Plausibility Failure

DTC C0131 0F
- ABS Pressure Circuit 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 System (VSES) event. The brake pressure sensor is part of the brake pressure modulator valve (BPMV).

Conditions for Running the DTC

* Ignition ON.
* Ignition voltage is greater than 8 volts.

Conditions for Setting the DTC

* Brake signal does not correlate to pressure signal.
* Signal is erratic and changes faster than physically allowed.

Actions Taken when the DTC Sets

* The EBCM disables the antilock brake system (ABS), traction control and StabiliTrak 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 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 (JL7) (Antilock Brake System Schematics (With RPO JL7))Antilock Brake System Schematics (Except JL7) (Antilock Brake System Schematics (Except RPO JL7))
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

ABS Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

Ignition ON, verify that DTC C0131 is not set.

If DTC is set, replace the BPMV. If the DTC resets, replace the EBCM

Repair Instructions

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

* Brake Pressure Modulator Valve Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for EBCM replacement, setup, and programming