Malfunctions Outside Transmission
WARNING: This page is about a different car, the 2008 Volkswagen R32. However, it is still accessible from the selected car via links, so may be relevant.
If, for example, the fault: "Anti-lock Brake System (ABS) signal missing" is stored in the transmission and perhaps another control module also says: "ABS signal missing", you should not continue to suspect the transmission control module is defective.
The entry simply means: The transmission (and possibly other control modules) is waiting for a signal via the BUS but is not receiving it. In this case, the ABS control module has a problem. Under no circumstances should you remove the Direct Shift Gearbox (DSG) mechatronic. In this example, the fault points to problems with the ABS.