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.
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Active Bending Lights (ABL)
When this function is activated, the headlight
beams adjust laterally to help light up a curve
according to movements of the steering wheel
(see the right-pointing beam in the illustration).
The ...
Low beams
When the engine is started, the low beams are
activated automatically (daytime running lights)
if the headlight control is in position 0 or
.
Daytime running lights can be deactivated in
the ...
Clock
Clock and setting control
1 - Display
2 - Control for setting the clock
Turn the control clockwise/counterclockwise to set the time. The set time is
shown in the information display.
The clock ...
