2011 Toyota RAV4 Owners Manual - Page 265

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 The de-icer will automatically turn off after approximately 15 minutes.