| 摘要 |
When an ignition switch is off, even if a master CPU (20a) receives a predetermined command signal, the master CPU (20a) does not immediately transmit an activating signal to slave CPUs (20b). At this time, power necessary for an electronic control unit (8c) is being supplied from a standby-current supplying converter (10). The master CPU (20a) transmits an activating request signal to a controller (12) to activate a normal supplying converter (9). The controller (12), after activating the normal supplying converter (9), transmits an activating completion signal to the master CPU (20a). For the first time upon receipt of this activating completion signal, the master CPU (20a) transmits the activating signal to the slave CPUs (20b). Consequently, power is supplied from the normal supplying converter (9) to all the electronic control units (8c to 8f).
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