Normal Operation

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

DTC U0100 (Lost Communication With ECM/PCM) - sets in the Trailer Brake Control (TBC) module if data messages received (vehicle speed) from the PCM are missing for more than 5 minutes. For a complete list of all network messages, refer to MODULE COMMUNICATIONS NETWORK .

This pinpoint test is intended to diagnose the following:

PCM
TBC module