IN-VEHICLE COMMUNICATION DEVICE AND METHOD FOR STARTING UP IN-VEHICLE DEVICE

An in-vehicle communication device and a method for starting up an in-vehicle device are provided. An in-vehicle communication device according to the present embodiment includes: a first processing unit; a second processing unit; and a communication unit. The first processing unit, upon being started up, performs initialization processing thereof. The second processing unit requires a shorter time from start-up until completion of the initialization processing than the first processing unit does. Another in-vehicle device is connected to the communication unit via a communication line, and the communication unit communicates with the other in-vehicle device in accordance with control of the first processing unit and the second processing unit. The second processing unit, after completing the initialization processing thereof, transmits an instruction to start up the other in-vehicle device via the communication unit.