METHOD FOR REWRITING PROGRAM, REPROGRAM APPARATUS, AND ELECTRONIC CONTROL UNIT

摘要

A reprogram apparatus does not transmit a reprogram data set as it is. The reprogram data set has a plurality of unit blocks and is used for rewriting a program in a memory of a subject electronic control unit (ECU). A consecutive range having at least the predetermined number of consecutive specified unit blocks is extracted. Range size information indicating a range size of the extracted consecutive range is transmitted to the subject ECU. The reprogram data set excluding the specified unit blocks included in the consecutive range is transmitted to the subject ECU on a unit-block-by-unit-block basis. The subject ECU restores the data corresponding to the consecutive range containing the specified unit blocks, which are not received from the reprogram apparatus, based on the range size information received. The reprogram data set is thereby restored. Rewriting of the program is executed using the reprogram data set restored.