Abstract: An engine start control unit enables engine start when a user performs a predetermined normal time push operation on a push switch in a normal mode. The engine start control unit enables the engine start when the user performs a predetermined fail-safe push operation on the push switch in a fail-safe mode. The fail-safe push operation of the push switch requires an increased work load of the user in comparison to that of the normal time push operation of the push switch.

Abstract: An engine start control unit enables engine start when a user performs a predetermined normal time push operation on a push switch in a normal mode. The engine start control unit enables the engine start when the user performs a predetermined fail-safe push operation on the push switch in a fail-safe mode. The fail-safe push operation of the push switch requires an increased work load of the user in comparison to that of the normal time push operation of the push switch.

Abstract: A vehicular communications system connects, through a communications network, with a plurality of electronic control units (ECUs) that control respective in-vehicle devices. The vehicular communications system further connects with a master ECU that monitors, for diagnosis, operating states of the ECUs through the communications network. When the master ECU detects a given ECU that is in an abnormal state, it restarts, through the communications network, the given ECU to return to an initial state. When the master ECU initializes the given ECU, it stores a record of initializing the given ECU in its EEPROM, and initializes, when necessary, a built-in memory of the given ECU. The master ECU can be constructed as initializing the given ECU based on an initialization request command from an outside of the vehicle through wireless communications.

Abstract: A vehicular communications system connects, through a communications network, with a plurality of electronic control units (ECUs) that control respective in-vehicle devices. The vehicular communications system further connects with a master ECU that monitors, for diagnosis, operating states of the ECUs through the communications network. When the master ECU detects a given ECU that is in an abnormal state, it restarts, through the communications network, the given ECU to return to an initial state. When the master ECU initializes the given ECU, it stores a record of initializing the given ECU in its EEPROM, and initializes, when necessary, a built-in memory of the given ECU. The master ECU can be constructed as initializing the given ECU based on an initialization request command from an outside of the vehicle through wireless communications.