For 1990-2009 cars only
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
DTC C0131 01: ABS Pressure Circuit Short to BatteryDTC 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
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References 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 after completing the diagnostic procedure.
| • | Control Module References for EBCM replacement, setup, and programming |
