How do you add freon to a 1987 Toyota Tercel?

To add freon to a 1987 Toyota Tercel, first ensure the AC system is off and locate the low-pressure service port, typically found on the larger diameter line. Use a manifold gauge set or a can of refrigerant with a hose to connect to this port. Start the engine and turn on the AC to the maximum setting, then slowly add refrigerant while monitoring the pressure gauge. Always follow safety precautions and consider consulting a professional if you’re unsure about the process.