| 摘要 |
<p>PURPOSE:To avoid remarkable depression of function of a vehicle when a trouble is generated in a signal transmitting line or a processing part for transmitting and receiving by establishing a supplying condition of reserve control signals obtained from a back up part to an operation part. CONSTITUTION:A plurality of transmitting and receiving nodes 14-26 arranged on respective parts of a vehicle body are connected to a low speed signal transmitting line 11 shown with a full line and a high speed signal transmitting line 12 shown with a one-dot chain line. The engine node 26 is provided with a processing part for transmitting and receiving, an interception part at trouble, a back up part, and a trouble diagnosis control part. When a trouble as to the signal transmitting line or the processing part for transmitting and receiving is not detected by the trouble diagnosis control part, control signals obtained from the processing part for transmitting and receiving are supplied to an operation part, meanwhile, when a trouble is detected, the interception part at trouble is let maintain interception condition of connecting line and reserve control signals obtained from the back up part are supplied to the operation part.</p> |
