How do you refill the freon in a '98 Nissan Maxima?

To refill the freon in a 1998 Nissan Maxima, first locate the low-pressure service port, usually found on the larger A/C line. Attach a refrigerant gauge and a can of R-134a refrigerant to the port, ensuring the can is upright. Start the engine and turn on the A/C to the maximum setting, then slowly release the refrigerant into the system until the proper pressure is reached. Monitor the gauge closely to avoid overfilling and ensure the system is functioning correctly.