Programmable Parameters

The message center displays TBC FAULT if it is receiving communications from the TBC module, but has not been configured for a trailer brake system. If the message center displays TBC FAULT and there are no DTCs stored in the TBC module, follow these steps to verify and/or modify the TBC module programmable parameter in the Instrument Panel Cluster (IPC).

1. Identify the vehicle using the normal Integrated Diagnostic System (IDS) process.
2. Select Programming and press the check box.
3. Select Module Programming and press the check box.
4. Select Programmable Parameters and press the check box.
5. Select Personality and press the check box.
6. Follow the on-screen directions.
NOTE: The scan tool displays either EQUIPPED or NOT EQUIPPED to the left of TBC-IPC.
7. Highlight TBC-IPC.
8. If the IPC needs to be configured for a trailer brake system, choose EQUIPPED and press the check box.
9. Clear DTCs from the TBC module, then carry out a self-test on the TBC module. Refer to the TRAILER BRAKE CONTROL (TBC) MODULE DTC CHART  for any DTCs retrieved.