| 摘要 |
<p>PURPOSE:To enable a multiplex transmitter for vehicle to set the multiplex transmitter itself into a wakeup state in the situation that its action can be required and to be appropriately set into system down in the situation that its action is not necessary to reduce the consumption of dark current. CONSTITUTION:Doorlock and doorlock release signals by a keyless entry unit 10 are input in a multiplex communication node 4, the relevant node 4 is sent to a transmission line 2, and other multiplex communication nodes 6 and 8 receive the relevant signal via transmission line 2. Further, each of nodes 4, 6, and 8, with the aid of each of start control means 4c, 6c, and 8c, is waken up based on the aforementioned input doorlock release signal, and furthermore based on the input doorlock signal each of nodes 4, 6, and 8 is set into systemdown. Moreover, if after wakeup there is no input to each of nodes 4, 6, and 8 for a predetermined period of time, each node 4, 6, or 8 is set into systemdown by the start control means 4c, 6c, or 8c.</p> |
