Thermostatic Vacuum Switching Valve (Tercel)
- Drain coolant from radiator and remove TVSV. Immerse threaded end of valve in container of water with thermometer. See Figure.
- Using ice, cool water in container to below 45°F (7°C). Check that air flows from port J to port M and L and from port K to port N. Heat water to 63-122°F (17-50°C). Check that air flows from port K to port N and L and from port J to port M.