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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About this manual
• Before you operate your vehicle for the first
time, please familiarize yourself with the
information found in the chapters "Instruments
and controls" and "Starting and
driving.&qu ...
Accessory installation
We strongly recommend that Volvo owners install only genuine, Volvo-approved
accessories, and that accessory installations be performed only by a trained
and qualified Volvo service technicia ...
Jump starting
Follow these instructions to jump start your
vehicle's dead battery or to jump start another
vehicle's dead battery using your vehicle.
Although your vehicle's battery is located
under the flo ...
