How do you charge freon on a 1999 Honda Passport?

To charge Freon on a 1999 Honda Passport, first ensure the engine is running and the AC is set to maximum. Locate the low-pressure service port, usually found on the larger diameter aluminum line between the compressor and the evaporator. Attach the refrigerant can's hose to this port, then open the valve on the can to release Freon while monitoring the pressure gauge. Be cautious not to overcharge and follow the manufacturer's specifications for the correct amount of refrigerant.