| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a surplus expense occurring when a door is erroneously locked by a method wherein even when a driver erroneously locks an automobile door with a key left in a car interior the automobile door is unlocked by using a public telephone positioned near the driver or a portable telephone set. SOLUTION: When a driver 4 to drive an automobile 2 locks an automobile door with a key 7 left in the automobile 2, by operating a portable telephone 5 or a public telephone 6, the on-vehicle device 3 of the automobile 2 is called. Only by inputting an ID code to unlock the door lock, an erroneously locked door lock is unlocked by the on-vehicle device 3. |
