See also:

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 ...

Brake pad inspection
On vehicles equipped with a jack, the condition of the brake pads can be checked by raising the vehicle (see page 190 for information about using the jack and removing a wheel) and performing a vi ...

Refrigerant
conditioning system in your vehicle contains a CFC-free refrigerant – R134a (HFC134a). This substance will not deplete the ozone layer. The approximate amount of R134a contained in the system is a ...