VERFAHREN ZUM REGISTRIEREN EINES IDENTIFIKATIONSKODES

摘要

A vehicle startup approval device for encripting an identification code, which is stored in an electronic key. A startup approval ECU (1) magnetically couples with a transmit-receive control circuit (6) of an electronic key (3) through an antenna (2) and an antenna (5) of the electronic key (3) in a state where the electronic key (3) is inserted into an ignition switch (4) and supplies power. The startup approval ECU (1) transmits a random number code when the ignition switch (4) is operated to an ACC position. Upon receipt of the random number code, the transmit-receive control circuit (6) of the electronic key (3) converts a key code, which has been beforehand registered, into a return code through a predetermined code processing on the basis of the random number code, and sends back the return code. Upon receipt of the return code, the startup approval ECU (1) decodes it to a key code on the basis of the random number code, and outputs a startup approval signal to an engine control ECU (7) when the key code matches the key code registered beforehand.