PROGRAM REWRITING METHOD OF ELECTRONIC CONTROL DEVICE, ELECTRONIC CONTROL DEVICE, AND REWRITING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a rewriting method, when reprogramming a plurality of ECUs (Electronic Control Units) via CAN (Controller Area Network), shortening a program rewrite time by parallelly rewriting the program without mediating an intermediate device such as a gateway.SOLUTION: A program rewriting system 1000 has such a configuration that a rewriting device 100 and one or more rewriting object ECUs 200a, 200b, and 200c are connected by a same network bus 300. The rewriting device 100 simultaneously transmits data to all rewriting object ECUs using a predetermined specific ID. The rewriting object ECUs generate different IDs respectively using individual identification data, and transmit data to the rewriting device using the respective IDs.