FAULT DETECTOR FOR INTENSIVE WIRING SYSTEM OF AUTOMOBILE

摘要

PURPOSE:To ensure an accurate error control by separating a certain terminal control part from the object control of a central control part when the error detecting frequency of the terminal control part exceeds a prescribed level. CONSTITUTION:The CPU of the central control part 10 receives the 1-frame data from terminal control parts 20A-20D and decides whether a BCC code contained in the received 1-frame data has no error. If it is decided that the received BCC code has an error, the CPU counts the error detecting frequency for each of control parts 20A-20D. If errors more than a prescribed frequency are continuously generated, the CPU lightens an optical push-button switch corresponding to the terminal number. In this case, the relevant terminal number is registered. Therefore the display or indication is inhibited for the data given from the corresponding terminal control part. The control subjects 40A-40D are prevented from being erroneously controlled by a faulty terminal control part accordingly.