2011 Toyota Tundra Double Cab Owners Manual - Page 520

3-8. Other interior features Seat heaters and ventilators∗ Blows air from the seats The indicator comes on. The higher the number, the stronger the airflow becomes. Heats the seats The indicator comes on. The higher the number, the warmer the seats become. n The seat heaters can be used when The engine switch is in the ON position. n When not in use Set the dial to 0. The indicator turns off. ∗: If equipped 494