Patent ID: 7068147

Claim:
A control information rewriting system for a vehicle comprising: an electronic control unit mounted in the vehicle for a vehicle control and having control information stored in electrically rewritable nonvolatile memory for the vehicle control; a rewriting device connectable to the electronic control unit for rewriting the control information by transmitting predetermined identification information and associated information related to the predetermined identification information; and a control center in data communication with the rewriting device for receiving the identification information and the associated information from the rewriting device, wherein the control center includes storing means for storing predetermined access information, the predetermined identification information of the rewriting device and the associated information related to the predetermined identification information, and an association relationship between the predetermined identification information and the associated information; and legitimacy determining means in data communication with the rewriting device and for acquiring a relationship between the predetermined identification information and the associated information of the rewriting device and for comparing the acquired relationship with the association relationship between the predetermined identification information and the association information stored in the storing means, and transmitting the predetermined access information stored in the storing means to the rewriting device when the acquired relationship matches the association relationship stored in the storing means thereby to control rewriting operation of the rewriting device.