2009 Lexus IS 350 Navigation Manual - Page 243

AIR CONDITIONING (e) Outside temperature display (f) Operating tips parking in the hot sun, drive for the first few minutes with the windows open. After the excess heat has blown away, close the windows. Make sure the air inlet grilles in front of the windshield are not blocked by leaves or other obstructions. If air flow control is not satisfactory, check the dashboard vents and rear vents. (See "(g) Adjusting the position of and opening and closing the air outlets" on page 266.) Keep the area under the front seats clear to allow air to circulate throughout the vehicle. On cold days, set the fan speed to high for a minute to help clear the intake ducts of snow or moisture. This can reduce the amount of fogging on the windows. When driving on dusty roads, close all windows. If dust thrown up by the vehicle is still drawn into the vehicle after closing the windows, it is recommended that the air intake control button be set to the OUTSIDE AIR mode to take in the fresh air and set the fan speed selector to any setting except OFF. If following another vehicle on a dusty road, or driving in windy and dusty conditions, it is recommended that the air intake control button be temporarily pressed in to the RECIRCULATED AIR mode, which will close off the outside passage and prevent outside air and dust from entering the vehicle interior. D To help cool down the interior after D D Outside temperature is displayed on the screen. The displayed temperature ranges from −40_C (−40_F) up to 50_C (122_F). If the temperature shows "− −" or "E", take your vehicle to your Lexus dealer. In the following situations, the correct outside temperature may not be displayed, or the display may take longer than normal to change. D When stopped, or driving at low speeds (less than 12 mph [20 km/h]) D When the outside temperature has changed suddenly (at the entrance/exit of a garage, tunnel, etc.) D D D D 263