C0279

Antilock Brake System

Diagnostic Information and Procedures

DTC C0279

Circuit Description

The PCM sends engine/axle/tire IDs to the EBCM via serial data communications immediately after the modules are powered up.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The EBCM receives invalid information from the PCM.

Action Taken When the DTC Sets

If equipped, the following actions occur:

The EBCM disables the TCS.
The traction off indicator turns ON.

Conditions for Clearing the DTC

The conditions for setting the DTC are no longer present and you use the scan tool Clear DTC's function.

Diagnostic Aids

Diagnose other ABS or TCS related DTC's prior to diagnosing DTC C0279.
If multiple TCS related DTC's are set, or the vehicle being serviced is not equipped with TCS, verify the correct EBCM is installed in the vehicle.

Test Description

The number below refers to the step number on the diagnostic table.

3. The PCM must have the correct part number for the specified application.

DTC C0279 Steps 1 - 7: