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 Descriptor
DTC C0131 00: ABS Pressure CircuitDTC C0131 4B: ABS Pressure Circuit Calibration Not Learned
DTC C0131 5A: ABS Pressure Circuit Plausibility Failure
Circuit/System Description
The electronic brake control module (EBCM) monitors the inputs of the internal brake pressure sensor and the internal temperature sensor for more accurate control during a vehicle stability enhancement system (VSES) event.
Conditions for Running the DTC
Ignition ON.
Conditions for Setting the DTC
C0131 00
The EBCM detects an internal pressure sensor fault.
C0131 4B
The pressure sensor calibration not learned
C0131 5A
The EBCM detects the readings between the internal brake pressure sensor and the internal temperature sensor do not correlate.
Action Taken When the DTC Sets
| • | The EBCM disables the antilock brake system (ABS), traction control system (TCS) and vehicle stability enhancement system (VSES) for the duration of the ignition cycle. |
| • | The EBCM sends a serial data message to illuminate the appropriate warning indicator/message. |
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 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 Verification
C0131 4B or 5A:
Verify DTC C0131 4B or 5A is not set.
| ⇒ | If the DTC is set, perform the Sensor Cluster Calibration and verify the DTC does not reset. If the DTC resets replace the EBCM and BPMV. |
C0131 00:
Verify DTC C0131 00 is not set.
| ⇒ | If the DTC is set, replace the brake pressure modulator valve (BPMV) and verify the DTC does not reset. 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 |
