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:
Disabling the remote control (front)
The IR transceiver for the front screen can be
switched off, which means that the remote
control cannot be used on the front screen.
This function can be activated under RSE
settings
Disabl ...
Recalibrating TPMS (Canadian models only)
In certain cases, it may be necessary to recalibrate
TPMS to conform to Volvo's recommended
tire inflation pressures (see the inflation pressure table on page 291), for
example,
if higher infl ...
Engine compartment
1 Engine compartment, upper
2 Engine compartment, front
3 Engine compartment, lower
Positions
These fuses are all located in the engine compartment
box. Fuses in C are located under A.
NOTE
...
