Protection of road vehicle electronic controllers against change of units unless identification code is produced

摘要

A microprocessor (2) based system is used for electronic control of road vehicles and includes protection against unauthorized manipulation. The sensors and actuators (5) are used with an interface memory (4). A program memory (3) has an auxiliary section (7). This holds a code number that allows a serial number to be generated when a secret code is entered. Only then is access granted.