Other information:
Refrigerant System Service
Basics (R-134a)
Refrigerant Recovery
Use only U.L.-listed service equipment that is certified to meet the requirements
of SAE J2210 when removing HFC-134a (R-134a) from the air conditioning system.
...
Filter inspection
The climate control air filter should be replaced according to the Maintenance
Schedule. If the vehicle is operated in severely air-polluted cities or on dusty
rough roads for a long period, it should be inspected more frequently and replaced
earlier. When you replace the cl ...