| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve safety for code by a method wherein a code signal responding to a code signal from a transmitter for allowing an access to be made to a car can be made by on-the-spot programming. SOLUTION: Information stored in a memory driver 120 is made to indicate a transmitter T that has sent a specified code signal to a receiver R during the latest period of programming. Code signals received during the whole period of non-programming are evaluated in accordance with the stored information. On a particular occasion when the transmitter T that has emitted the code signal sends that signal to the receiver R during the latest period of programming, control for making access to a car is allowed, responding to that code signal. Thereby, code for allowing access can be programmed on the spot.</p> |
