Circuit Description
The PCM sends engine/axle/tire IDs to the EBCM via serial data communications immediately after the modules are powered up.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0279 Powertrain Configuration Not Valid
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 DTCs function.
Diagnostic Aids
Diagnose other 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 Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
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 and Setup. Did you complete the action? | Go to Step 7 | -- |
6 | Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 7 | -- |
7 |
Does the DTC reset? | Go to Step 3 | System OK |
