| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a keyless device for a vehicle, detecting a portable unit in a cabin even when an antenna for transmitting an answer request to the interior of the vehicle breaks down. <P>SOLUTION: A search range A of a vehicular external antenna 45 is set to a search range A2 narrower than an ordinary search range A1, whereby an overlap part between a search range B of a vehicular external antenna 46 and an ordinary search range B1 is set to only the interior of the vehicle. <P>COPYRIGHT: (C)2008,JPO&INPIT |
