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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Manual operation
1. Opening the sun shade: Pull the control
back to the first stop (the manual open
position) and hold it until the sun shade has
opened to the position of your choice.
2. Opening the rear edge ...
Replacing bulbs
When replacing bulbs, keep the following
points in mind:
• Never touch the glass of bulbs with your
fingers. Grease and oils from your fingers
vaporize in the heat and will leave a deposit
on t ...
Technician certification
In addition to Volvo factory training, Volvo supports
certification by the National Institute for
Automotive Service Excellence (A.S.E.). Certified
technicians have demonstrated a high
degree of c ...
