Bus disconnection locating method for control area network (CAN) bus network involves determining location of bus disconnection if central controller receives voltage from one controller but not from another controller

摘要

A signal line (26) separate from a bus, which comprises two bus lines (10,11), supplies a signal (28) to different controllers (12) in a daisy chain arrangement. The controllers apply a direct current (DC) voltage between the bus lines. A central controller (16) determines if the DC voltage is transmitted over the bus lines and determines the approximate location of a bus disconnection (30) between controllers if the central controller receives DC voltage from one controller but does not receive DC voltage from another controller.