Control information rewriting device

摘要

A rewriting device for rewriting control information stored in an electronic control unit while communicating with an external device comprises receiving means (B4) for receiving a rewriting permission from the external device, control information transmitting means (B14) for acquiring the control information from the external device after executing predetermined processing with the electronic control unit in response to the rewriting permission, and transmitting the control information to the electronic control unit, and identification information transmitting means (B1) for transmitting identification information of the rewriting device to the external device, so that the external device transmits the rewriting permission when the identification information is appropriate.