A warm-up control apparatus of an internal combustion engine is installed in a vehicle equipped with a brake booster that uses a negative pressure in an intake pipe of the internal combustion engine. The semiconductor device transmits the processing results of the functional circuits to the communication device by a time-division system. In the examination tunnel, an auxiliary arrangement can be disposed that has a tunnel that, given arrangement of the auxiliary arrangement in the examination tunnel is parallel to the examination tunnel. The first node or the second node is biased at a bias provided for the first circuit.