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:
How BLIS functions in daylight and darkness
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 headligh ...
Parking the vehicle in warm weather
If your vehicle has been parked in the sun in
warm weather, opening the windows and
moonroof for several minutes before driving
will help release the warm air from the passenger
compartment. When ...
Keyless drive
Vehicles equipped with the optional Personal Car Communicator have the keyless
drive function, see page 63 for detailed information. ...
