To prevent lowering of security generated in the case where the identification code of a portable transmitter is registered on a receiver provided on a plurality of vehicles.
A receiver 5 judges that a person having a radio key 1 does not use a vehicle, performs the lock operation of a door (timer lock operation), performs learning and shortens and sets a wait time only for a constant time at the time when the door does not open within a prescribed wait time after an unlock signal SUL from a radio wave key 1 is effectively received and the unlock operation of the door is executed. The receiver 5 judges that the person having the radio wave key 1 does not use the vehicle and sets a long signal confirmation time at the time when the unlock signal SUL for a trunk is received in the case where the door does not open within the prescribed wait time after the trunk is opened and operated by the unlock signal SUL from the radio wave key 1.
KINO TETSUYA
OGISO SATORU
NITTA SHIGENORI
SAKURAI MASASHI
