2006 Toyota Corolla Owners Manual - Page 156

'06 Corolla_U (L/O 0508) Side vents Air conditioning filter (on some models)- If air flow control is not satisfactory, check the side vents. The side vents may be opened or closed as shown. The air conditioning filter information label is placed inside of the glove box as shown and indicates that a filter has been installed. The air conditioning filter prevents dust from entering the vehicle through the air conditioning vent. The air conditioning filter is behind the glove box. 156