| 摘要 |
A keyless entry system that prevents a steering shaft and such from being unlocked without any intention of a passenger. A portable device is carried by a passenger and a vehicle control device for carrying out a certification process for the portable device to lock or unlock a device subject to locking is mounted to a vehicle. The portable device sends instruction information giving an instruction to limit unlocking of the device subject to locking to the vehicle control device in accordance with an instruction from the passenger. The vehicle control device maintains locking of the device subject to locking in the case of receiving the instruction information from the portable device.
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