Section 1 (Engine Cooling System): Maintenance: Refilling
WARNING: This page is about a different car, the 1988 Toyota Celica and 1987 Toyota Celica. However, it is still accessible from the selected car via links, so may be relevant.
Engine should be running while refilling cooling system to prevent air from being trapped in the engine block. After system is full, continue running engine until thermostat is open, then recheck fill level. Do not overfill system.