METHOD AND DEVICE FOR DIAGNOSING FAULT IN ON-VEHICLE MULTIPLEX COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To easily specify the position of a fault, to easily correct the fault and to reduce man-hour for correction work by diagnosing a fault in each block specifying and correcting a fault position.;SOLUTION: A load 122 is detached from a connector 22 allowed to be easily detached in a block and a fault diagnosis unit 15 having an independent power supply is attached to the connector 22 instead of the load 122. A fault diagnosis control unit 31 for controlling the block starts a fault diagnostic function unit 121 by obtaining power supply through the connector 22 and outputs a diagnostic result as a code by using a load output signal line of the connector 22. When the diagnostic result is displayed by the lighting pattern of a lamp load e.g. the existence of a fault or the contents of the fault can be easily grasped.;COPYRIGHT: (C)2001,JPO