| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a user from misjudging the operation unacceptable state of an operation key part for electrical accessory control as a fault state of an on-vehicle electrical accessory by showing it on the same display screen that the operation key part is in the operation unacceptable state in relation with travel conditions of the vehicle during such a state. SOLUTION: As a function key 19 is operated, the operation state of a target electrical accessory and the operation key part 24 are displayed on the display screen 11 of a display device 10 at the same time. In this case, if the operation key part 24 enters the operation unacceptable state in relation with a travel of the vehicle, the user can know that. Namely, while no operation is acceptable, a display meaning the operation unacceptable state of the operation key part 24 is made on the display screen 11, for example, by displaying a mark 'CD' on the display screen, making the background color of the display screen 11 different from usual one, or not displaying the operation key part 24.</p> |
