| 摘要 |
PROBLEM TO BE SOLVED: To provide a tire pressure monitor system whose structure is simple and reliability is high. SOLUTION: Remote energy transmission circuits 30, 35, 36, 37 transmit a first RF signal in order when activated by a controller 60. When a remote unit 14 in a tire receives the first RF signal, and pressure in the tire is higher than a specified value, the remote unit 14 transmits a second RF signal. Via a remote receiver 20, the controller 60 judges whether the second RF signal is received within a specified time after the first RF signal is transmitted. When the second RF signal is not received within the specified time, the controller 60 supposes pressure detection fault and displays this state. |
