• | 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. |
The electronic brake control module (EBCM) uses input from the brake pressure sensor for vehicle stability enhancement system (VSES) functions. The brake pressure sensor is internal to the brake pressure modulator valve (BPMV).
• | Ignition ON. |
• | Ignition voltage is greater than 10 volts. |
• | 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. |
• | The EBCM detects the brake pressure does not increase when braking, when it received a message that the brake pedal is applied. |
• | The EBCM detects the brake pressure is increasing when braking, and did not receive a message that the brake pedal is applied. |
• | Internal pressure sensor fault. |
• | 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. |
• | 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. |
A C0131 can get set if the ECU is loosely attached to the hydraulic unit. The mountings should be checked for the proper torque.
Antilock Brake System Schematics
Antilock Brake System Connector End Views
Scan Tool Data List for EBCM
⇒ | If brake lamps do not operate properly, refer to Symptoms - Lighting Systems. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for EBCM replacement, setup, and programming |