Antilock Brakes / Traction Control

DTC C0550
DTC Descriptor
DTC C0550
Electronic Control Unit (ECU) Performance

Diagnostic Fault Information

Important: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Diagnostic System Check - Vehicle

Circuit/System Description
The electronic brake control module (EBCM) detects an internal malfunction.

Conditions for Running the DTC
The ignition switch is in the ON position.

Conditions for Setting the DTC
An internal EBCM malfunction exists.

Action Taken When the DTC Sets
One or more of the following actions may occur:
^ The EBCM disables the Antilock Brake System (ABS)/Traction Control System (TCS)/Vehicle Stability Enhancement System (VSES) for the duration of the ignition cycle.
^ The dynamic rear proportioning (DRP) may be disabled and the Brake Warning indicator may turn ON.
^ The Stability Caution indicator turns ON.
^ The DIC displays the SERVICE STAB SYS message.
^ The DIC displays the TRACTION FAILED message.

Conditions for Clearing the MIL/DTC
^ The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
^ The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Circuit/System Verification
DTC C0550 will set as result of internal EBCM circuit failure.
^ Replace the EBCM.

Repair Instructions

Important: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

Control Module References - for EBCM replacement, setup, and programming