| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To perform secure and stable communication by back-up with a single signal line using control of an important load when a multiplex communication line or the like is damaged. <P>SOLUTION: An important load circuit and an unimportant load circuit are provided on an input side ECU and an output side ECU. A control portion is not provided in the important load circuit. The control portion and a communication portion are provided in the unimportant load circuit. The important load circuit and the unimportant load circuit of the input side ECU are connected to an input device. The important load circuit of the output side ECU is connected to the important load, and the unimportant load circuit of the output side ECU is connected to unimportant load. The important load circuits of the both ECUs are connected to each other through the single signal line. The unimportant load circuits are connected to each other through the multiplex communication line. A circuit switching device is interposed between the important load circuits of the both ECUs. When abnormality occurs in the communication portion and the multiplex communication line of the unimportant load circuit, the circuit switching device is switched to multiplex the single signal line or overlap to the single signal line, used as an auxiliary circuit of the unimportant load circuit. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
