Where is the AC expansion valve located on a 1990 Toyota Camry?
The AC expansion valve on a 1990 Toyota Camry is located within the evaporator housing, under the dashboard. It's not easily accessible without removing significant parts of the dashboard. You'll need to consult a repair manual specific to your 1990 Camry model for detailed instructions and diagrams. Accessing it requires considerable mechanical aptitude and potentially specialized tools.