2010 Toyota Sequoia Owners Manual - Page 963

3-1. Using the air conditioning system and defogger Rear window and outside rear view mirror defoggers∗ These features are used to defog the rear window, and to remove raindrops, dew and frost from the outside rear view mirrors. On/off Press the button to turn on the rear window defogger. The indicator will come on. The defoggers will automatically turn off after approximately 15 minutes. Pressing the button again also turns the defoggers off.