ANTI-THEFT SYSTEM AND METHOD FOR A VEHICLE

摘要

Anti-theft system and method in which re-registration and deletion of a code is performed without using an exclusive tool. Modes are changed to a master key code registration mode when an ignition switch is switched from OFF to ON five times consecutively within T1 seconds after a master key having its code registered is inserted into a key cylinder, within the following T2 seconds an opening and closing operation of a door is repeated six times, and the ignition switch is switched off and then the key is removed from the key cylinder. When a master key, a new code of which is to be registered is then inserted into the key cylinder within T3 seconds after the master key having a code already registered is pulled out of the key cylinder, and the ignition switch is turned on within T4 seconds after the insertion of the master key into the key cylinder, an identification code to be registered is read out of a transponder, and after a lapse of T5 seconds the identification code so read out is registered in memory as a registration code.