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 00: ABS Pressure CircuitDTC C0131 3A: Pressure Circuit Incorrect Component Installed
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
C0131 00
| • | Sensor supply voltage is less than 4.5 volts or greater than 5.3 volts for more than 1 sec. |
| • | Sensor signal voltage is less than 0.12 volts or greater than 3.2 volts for more than 1 sec. |
C0131 3A
EBCM has been replaced and the calibration to the brake pressure sensor is outside of programed range.
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. |
Diagnostic Aids
A DTC C0131 can set if the ECU is loosely attached to the hydraulic unit. The mountings should be checked for the proper torque.
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
C0131 00 or C0131 5A
Replace EBCM/BPMV assembly.
C0131 3A
Verify DTC C0131 3A is not set.
| ⇒ | If DTC is set, perform the special function, Brake Pressure Sensor Calibration. If the DTC resets replace EBCM/BPMV assembly. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for EBCM replacement, setup, and programming |
