I didn't bother. Pretty obvious if your fans are on or not. If they are, unmarry the AP.
Dealer lets the car cool down to below the tick a third of the way up on the temp gauge and start the car to see if the fans go on.
Lots of folks say to unmarry anyway, but I don't know of any dealer/thought process that would have a tech 1) hooking up diagnostics to begin with and 2)reflashing without any reason.
Last edited by Beanboy; 04-25-2007 at 06:21 PM..