Motor vehicle control unit programming method in which, before the unit can be programmed, a user must input an authorization code to an external computer that is used to access the control unit

摘要

A method for changing the programming of a motor vehicle control unit (1). The control unit is connected via an interface (4) to an external computer (6). The latter reads information from the control unit and, based on it, sends an appropriate key code to the control unit that unlocks it to permit changing of the programming. To unlock the control unit a predetermined security code must first be entered into the computer and transmitted to the control unit.