Patent ID: 7559235

Claim:
A tire air pressure monitoring system, comprising: 1) a sensor unit configured to be mounted to each tire of a vehicle and including: i) an air pressure sensor configured to output a tire air pressure, and ii) a transmitter configured to transmit a radio wave; 2) a receiver configured to receive the radio wave transmitted from the sensor unit; 3) a tire air pressure monitoring controller configured to warn a vehicular occupant of a tire air pressure decrease when the tire air pressure is less than or equal to a warning threshold, the tire air pressure monitoring system further comprising: 4) a puncture sensor configured to sense a puncture of the tire, and 5) a puncture repairing agent use sensor configured to sense whether or not the puncture is repaired by using a puncture repairing agent after the puncture is sensed, wherein when the puncture repairing agent use sensor senses that the punctured tire is repaired by using the puncture repairing agent, the tire air pressure monitoring controller continues the warning even though the tire air pressure from the air pressure sensor is normal.