Circuit Description
The powertrain control module (PCM) sends engine/axle/tire IDs to the electronic brake control module (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 traction control system (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 DTCs function.
Diagnostic Aids
| • | Diagnose other antilock brake system (ABS) or TCS related DTCs prior to diagnosing DTC C0279. |
| • | If multiple TCS related DTCs 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.
Step | Action | Yes | No |
|---|---|---|---|
1 | Did you perform the ABS Diagnostic System Check? | Go to Step 2 | |
2 |
Does the DTC set? | Go to Step 3 | Go to Diagnostics Aids |
Verify the correct powertrain control module (PCM) is installed in the vehicle. Does the vehicle have the correct PCM? | Go to Step 4 | Go to Step 6 | |
4 | Use the scan tool in order to read the Calibration IDs of the PCM. Are the PCM Calibration IDs correct? | Go to Diagnostics Aids | Go to Step 5 |
5 | Perform the set up procedure for the PCM. Refer to Service Programming System (SPS) in Programming. Did you complete the action? | Go to Step 7 | -- |
6 |
Important: Perform the setup procedure for the PCM. Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls - 4.8 L, 5.3 L, and 6.0 L. Did you complete the replacement? | Go to Step 7 | -- |
7 |
Does the DTC reset? | Go to Step 3 | System OK |
