This diagram: Secondary intake

http://img820.imageshack.us/img820/1943/airm.jpg

This diagram explains that at high RPM the secondary intake opens [4] and allows more air to be sucked in to the engine. However, outside I noticed that when I stuck my hand in the hole, the intake was open at idle. Does this close when the car is in gear and running or have I found a fault with the car?