Section 786 (Coolant): Coolant: Inspection

WARNING: This page is about a different car, the 2004 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.

CHECK ENGINE COOLANT LEVEL AT RESERVOIR
The engine coolant level should be between the "LOW" and "FULL" lines, when the engine is cold. If low, check for leaks and add "Toyota Long Life Coolant" or equivalent up to the "FULL" line.
CHECK ENGINE COOLANT QUALITY
Remove the radiator cap.

CAUTION: To avoid the danger of being burned, do not remove the radiator cap while the engine and radiator are still hot, as fluid and steam can be blown out under pressure.

There should not be any excessive deposits of rust or scale around the radiator cap or radiator filler hole, and the coolant should be free from oil.

If excessively dirty, replace the coolant.