Brake Fluid Level Switch
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2000 Toyota MR2, 2000 Toyota ECHO, 2000 Toyota Corolla, 2000 Toyota Celica, and 2000 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.
Remove cap and strainer from brake fluid reservoir. Disconnect brake fluid level switch connector. Check for continuity between brake fluid level switch terminals. With reservoir full (float up), continuity should not exist. With reservoir empty (float down), continuity should exist. If continuity is not as specified, replace brake fluid level switch.