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:
Repeat
This function makes it possible to play files in a folder repeatedly. When the
last file has been played, the first file will begin again. To activate:
1. Press OK/MENU.
2. Turn TUNE to Repeat fol ...
ABS with EBD (Electronic Brake ForceDistribution)
EBD is an integrated part of the ABS system.
EBD regulates the hydraulic pressure to the
rear brakes to help provide optimal braking
capacity. The brake pedal will pulsate during
braking, which ...
Calibration
The compass may need to be calibrated if, for example, the vehicle is driven
into a new magnetic zone. The character C is shown in the mirror's display if calibration
is necessary.
1. Stop th ...
