my ecm will not connect to reader unless i'm cranking. no codes. it won't start. i have fuel pressure. switched starter and ecm relay. same thing. got reman ecm. same thing. traction control off light is on. to recap, plug in reader, put key to on and reader will not connect. start cranking and it connects. does this ring a bell? is there some 'sensor' i should disconnect? or whatever...? i've been a few years with no air ride. springs now. prior to this, i was solving no start by putting in new ecm relay. Now i've gone back thru some i replaced and they are good. I've powered duel elect. fan with them. one is in starter relay even now. but had to add this as it is what was going on leading up to this. no start. no read. so if you got something to try let me know... thanks. i can't even remember how reader used to connect, but doesn't it only need key in? or key in first position? or does it even need the key in?