| 摘要 |
PROBLEM TO BE SOLVED: To provide a tire air pressure drop warning device capable of improving detection accuracy of tire decompression. SOLUTION: This tire air pressure drop warning device warns of an internal pressure drop of a tire using a determination value obtained on the basis of rotation information obtained from tires attached to a four-wheel vehicle. It is provided with a rotation information detecting means detecting the rotation information of each tire, a memory means storing the rotation information of each tire, an arithmetic processing means calculating the determination value from the rotation information of each tire, and a determination value correcting means correcting the determination value by weight determined on the basis of a steering angle obtained from a steering angle sensor attached to a steering wheel.
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