An electronic control device enabling heat generated by a power module to be favorably radiated even in a high-temperature condition in an engine compartment. The source, drain and channel materials are chosen such that, for a NMOS type transistor, the electronic affinity of the drain material is lower than the electronic affinity of the channel material and the electronic affinity of the source material is higher than the electronic affinity of the channel material. Thereupon, an array tester sequentially tests two pixels corresponding to the signal lines in the signal groups. A plurality of the keys and the multidirectional navigational input key have alphanumeric indicia. A token is generated based on the signed description. 5, comprising 3-80% by weight of a solid organic acid polymer; 92-15% by weight of a solid organic acid, and 5-30% of a wetting agent.