| 摘要 |
PROBLEM TO BE SOLVED: To prevent on-vehicle equipment from being exchanged illegally and to permit legal exchanges such as reinstallation onto a self vehicle. SOLUTION: When a detachment detecting means 1 detects the on-vehicle equipment is detached from a vehicle, rather than making the on-vehicle equipment unusable an in conventional cases but a vehicle type information changing means 19 changes the vehicle type information into the vehicle type of a toll higher than a vehicle type set to that on-vehicle equipment and an illegal user is made to realize the illegal utilization is not profitable. Additionally, when the detachment detecting means 1 discriminates between an exchange for the illegal utilization and an exchange, which is not illegal use, when exchange which is not the illegal utilization, without making changes in the vehicle type of higher toll, the on-vehicle equipment can be used continuously. |
