I think, 2- is the main idle control valve 3- is to up the idle when you turn the aircon on as this engages the a/c pump and turns the fans on so it ups the idle so it don't idle to low with the drain on the engine, and 11- is the cold start as low612 says it has a temp switch thingy in it witch opens and closes with the heat.
Edited: actully i think 2 and 3 are the other way round i am not to sure now:doh: