2010 Toyota Highlander Owners Manual - Page 908

3 -1 . U sing t he a ir c ondit ioning syst e m a nd de fogge r Windshie ld w ipe r de -ic e r ∗ This feature is used to prevent ice from building up on the windshield and wiper blades. On/off Press the button to turn on the windshield wiper de-icer. The indicator light will come on. The windshield wiper de-icer will automatically turn off after approximately 15 minutes. 3