Patent ID: 6957136
Filing Date: 2005-10-18
Classification: G06F,G11C

Abstract:
1. An apparatus for rewriting a memory in a vehicle mounted ECU (Electronic Control Unit) through communications, said apparatus comprising: a transmission and reception circuit for performing data communications with a data communications device which sends program data; an ID check circuit for checking based on an ID check code attached to said program data whether a subject vehicle on which said apparatus is installed is a vehicle to be rewritten; a communications condition determination device for determining whether the present condition of communications is suitable for communications with said data communications device; and control means for performing writing control in such a manner that when it is determined based on an output from said ID check circuit that the subject vehicle is a vehicle to be rewritten, the program data received by said transmission and reception circuit is written into the memory in said vehicle mounted ECU, said control means being operable to notify the non-completion of rewriting to said data communications device when said communications condition determination device determines, before and during data rewriting, that the present condition of communications is unsuitable for communications, and also to notify the completion of rewriting to said data communications device after the rewriting of the data has been completed, when it is determined that the present condition of communications is suitable for communications, wherein the ID for data rewriting check is set to the same code as an ID code of an anti-theft device mounted on said subject vehicle.