DTC U0101-00: TCM Communication Error: Notes

WARNING: This page is about a different car, the 2016 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

System malfunction location	TCM communication error
Detection condition	The SAS control module does not receive CAN signal from TCM for 5 s or more , or receives CAN signal error from TCM for 0.4 s .
Fail-safe function	Not applicable
Possible cause	Malfunction in CAN line between the SAS control module and TCM
System wiring diagram	Not applicable