| 摘要 |
�Object� To provide a method of preventing car thefts capable of effecting easy registration of a new master key to thereby save time and labor in changing a master key when a wrong master key has been registered or a key cylinder is replaced, in a method of a device for preventing car thefts, when said key is inserted in said key cylinder, engine starting being allowed when the ID code detected by said transponder coincides with an ID code which has been registered in said controller. <??>�Structure� A key with a transponder which is inserted initially when the ID code registered in said controller has been erased, is enabled to be registered as a master key, and that after an unregistered key is inserted and the main switch is switched on, said unregistered key is drawn out without engine starting, and a key with a transponder having a specific ID code is accessed to said key cylinder within a predetermined time to thereby erase all the registered ID codes, so that a new key is enabled to be registered as a master key. <IMAGE> |
