expansion valve on 1992 Toyota Previa

Acoording to them I have a valve magnetic valve leak but everywhere I search I have not found anything about a magnetic valve only thing I have found is an expansion valve. They say it is the reason that I leak free on

Asked by for the 1992 Toyota Previa
If you don't have A/C experience it may not be such a good idea to proceed. Proper A/C work takes special tools and training. It looks like in the documentation that Toyota refers to the Expansion valve as the Magnetic Valve.

here is a link to a repair info site if you need more help: