How do states use OBD II for emission inspections?
Many states connect a computer directly to a vehicle's OBD II system. The inspector can then read "faults." In some states, this type of inspection has replaced the tailpipe emission test.
See also:
Tire pressure monitoring light
The tire pressure monitoring
system uses sensors
mounted in the tire valves to check inflation
pressure levels. When the vehicle is moving
at a speed of approximately 20 mph
(30 km/h) or faster, ...
How BLIS functions in daylight anddarkness
Daylight
BLIS reacts to the shape of surrounding vehicles.
The system is designed to help detect
motor vehicles such as cars, trucks, buses,
motorcycles, etc.
Darkness
BLIS reacts to the headl ...
The Federal Clean Air Act – U.S.
The Federal Clean Air Act requires vehicle
manufacturers to furnish written instructions to
the ultimate purchaser to assure the proper
servicing and function of the components that
control emissi ...