Patent ID: 7215243

Claim:
A method for authorizing a tire pressure characterization in a vehicle having a motor and an ignition for starting the motor, the method comprising the steps of: initiating a tire pressure characterization sequence by placing the ignition in a first position in which the motor of the vehicle is not running and simultaneously depressing the odometer reset button; measuring the air pressure in a left front tire with a tire valve stem interface disposed on a key fob; setting a flag marker approval corresponding to the left front tire when the air pressure in the left front tire meets or exceeds placard pressure; measuring the air pressure in a right front tire with a tire valve stem interface disposed on a key fob; setting a flag marker approval corresponding to the right front tire when the air pressure in the right front tire meets or exceeds placard pressure; measuring the air pressure in a left rear tire with a tire valve stem interface disposed on a key fob; setting a flag marker approval corresponding to the left rear tire when the air pressure in the left rear tire meets or exceeds placard pressure; measuring the air pressure in a right rear tire with a tire valve stem interface disposed on a key fob; setting a flag marker approval corresponding to the right rear tire when the air pressure in the right rear tire meets or exceeds placard pressure; testing whether flag marker approvals exist for all four tires; and authorizing a characterization when all four tires have flag marker approvals.