Telematic control unit

A telematic control unit (TCU) in the automobile industry refers to the embedded system on board of a vehicle that wirelessly connects the vehicle to cloud services or other vehicles via V2X standards over a Cellular network. The TCU collects telemetry data from the vehicle, such as position, speed, engine data, connectivity quality etc through interfacing with various sub-systems over data and control busses in the vehicle. It may also provide in-vehicle connectivity via Wifi and Bluetooth and implements the eCall function on applicable markets.
Note that in the automotive domain, the TCU acronym is also often used to refer to the transmission control unit. Disambiguation is usually possible from looking at the context.
A TCU consists of: