Patent ID: 7154414

Claim:
A system for remote monitoring of tire pressure in a vehicle having a plurality of tires, the system comprising: a plurality of tire monitors, each monitor for mounting in one of the plurality of tires, each monitor comprising a sensor for sensing tire pressure, and a transmitter for transmitting a wireless signal representative of the sensed tire pressure; and a receiver for mounting on-board the vehicle for receiving the tire pressure signals, the receiver having at least an inactive state when the vehicle is off; wherein a tire pressure signal transmitted by a transmitter has associated therewith a wake-up signal when the vehicle has been stationary for a predetermined time period, the wake-up signal being provided to ensure receipt by the receiver of the tire pressure signal when the receiver is in the inactive state, and wherein a tire pressure signal transmitted by a transmitter lacks an associated wake-up signal at least once when the vehicle has not been stationary for the predetermined time period.