All my aux fans come on either when the freon temp reaches a certain point or when the engine temp reaches a certain point. {ie: comes on without AC}
Even my 240's do this.....
Sounds like you are working normally, although I would have to reread from the top to be sure. too lazy..........

__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John