| 摘要 |
A vehicular keyless entry system is formed of an in-vehicle device and a plurality of portable devices. The portable device stores received checkup area identification information in a memory circuit. The portable device transmits a response signal including the stored checkup area information and portable device identification information, when a request signal is received from an in-vehicle device. The in-vehicle device checks up a plurality of portable devices based on the portable device identification information included in the response signal, and determines locations of the plurality of portable devices based on the checkup area identification information included in the response signal. The in-vehicle device performs vehicle door locking control operation based on a determination result. |
