What is TPMS?
TPMS(Tire Pressure Monitoring System) is an electronic system used to monitor air pressure and temperature inside tires. TPMS returns real-time tire info. to car ECU for warning drivers through display or warning symbol.
- Origin in USA: Firestone : In May 2000, the U.S. National Highway Traffic Safety Administration (NHTSA) contacted Ford and Firestone about the high incidence of tire failure on Ford Explorers, Mercury Mountaineers, and Mazda Navajos fitted with Firestone tires.
- Legislation: The use of TPMS in vehicles in the USA was mandated in 2000 by the Transportation Recall Enhancement, Accountability and Documentation Act (or TREAD). This states that the driver of a vehicle must be warned of under inflation by 25%. The warning is displayed to the driver in line with 49 CFR Part 571 Federal Motor Vehicle Safety Standards (FMVSS). The minimum requirement for the warning is in the form of a simple lit symbol on the dashboard, and this is often augmented by the display of a graphic of the car showing the wheel position to which the warning light corresponds. All new model year 2008 light vehicles shall have a TPMS (direct or indirect) fitted which is capable of detecting when one or more of the vehicle’s tires, up to all four tires, is 25% or more below the manufacturer’s recommended inflation pressure (placard pressure) or a minimum activation pressure specified in the standard, whichever is higher.
- European Union(EU) and Far East legislators are looking at TPMS as a way of reducing CO2 emissions, and are presently (as at January 2009) considering compulsory tire pressure monitoring systems from this environmental stance.
Starting in November 2012, all new models of passenger cars must be equipped, in E.U., with a TPMS. From November 1, 2014, all new passenger cars sold in the European Union must be equipped with TPMS.