Patent ID: 7237433

Claim:
A tire pressure monitoring system for a vehicle that rides on N tires during use, comprising: N rotation sensors that generate N rotation signals based on rotation of respective ones of said N tires; M pressure sensors that are associated with M of said N tires and that generate pressure signals based on pressure within respective ones of said M of said N tires; and a control module that receives said N rotation signals from said N tires and said M pressure signals from said M of said N tires and that monitors a pressure condition in at least one tire other than said M of said N tires based thereon; wherein said control module determines a first distance one of said N tires has traveled based on said rotation signal associated with said one of said N tires, determines a second distance another of said N tires has traveled based on said rotation signal associated with said another of said N tires and monitors said pressure condition based on said first distance and said second distance.