• | 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 body control module (BCM) sends a serial data message when the brake pedal is applied. The electronic brake control module (EBCM) compares the brake pressure sensor values to ensure they agree with the brake pedal applied signal.
Ignition ON.
• | Brake signal does not correlate to pressure signal. |
• | Signal is erratic and changes faster than physically allowed. |
• | The Traction Control indicator turns ON. |
• | The driver information center (DIC) displays the Service Stability System message. |
The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
Antilock Brake System Schematics
Control Module References for scan tool information
⇒ | If brake lamps do not operate properly, refer to Symptoms - Lighting. |
⇒ | If the DTC resets, replace the EBCM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for EBCM replacement, setup, and programming |