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: Antilock Brake System (ABS)/Traction Control System (TCS) Pressure Circuit Short to BatteryDTC C0131 04: ABS/TCS Pressure Circuit Short to Ground or Open
DTC C0131 5A: ABS/TCS Pressure Circuit Plausibility Failure
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
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Apply and release brake pedal. Verify brake lamps operate properly.
- If all circuits test normal, replace the EBCM/brake pressure modulator valve (BPMV) assembly.
| ⇒ | If brake lamps do not operate properly, refer to Symptoms - Lighting. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for EBCM/BPMV replacement, setup, and programming. |
