| 摘要 |
PROBLEM TO BE SOLVED: To prevent a theft more securely, regarding a vehicle allowing use via the collation of an ID code. SOLUTION: A transmitter 1 is provided with a transmission ID code memory part 2 for storing an inherent transmission ID code, and a variable code generation part 3 for generating a variable code regularly changing for transmission together with the transmission ID code at every transmission thereof. On the other hand, a receiver 4 is provided with a receiving ID code memory part 8 for storing the variable code. Also, when the transmission ID code and the receiving ID code are collated with each other and identified as corresponding to each other, a new variable code transmitted currently and the previous variable code are compared with each other. When the result of the comparison is within the prescribed range, a status is identified as normal. According to this construction, a vehicle theft by other persons using a learning remote control or the like with a transmission signal intentionally copied from the transmitter 1, can be more properly prevent ed. |
