Circuit Description
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
The DTC U0107 Lost Communication With the Throttle Actuator Control (TAC) Module diagnostic monitors the communication between the TAC module and the powertrain control module (PCM). The TAC module and the PCM communicate on a serial data line. If the PCM can not communicate with the TAC module, DTC U0107 sets.