2010 Toyota Highlander Owners Manual - Page 304

3-1. Using the air conditioning system and defogger n The defogger can be operated when Vehicles without smart key system The engine switch is in the "ON" position. Vehicles with smart key system The "ENGINE START STOP" switch is in IGNITION ON mode. n Outside rear view mirror defoggers (vehicles with outside rear view mirror defoggers) Turning the rear window defogger on will turn the outside rear view mirror defoggers on. CAUTION n Outside rear view mirror defoggers (vehicles with outside rear view mirror defoggers) The surfaces of the outside rear view mirrors become hot. Do not touch them to prevent from burning yourself. 278