Hi Guys. I have an '05 Limited Conv that won't start unless I put the key in ignition in the ON position and (2nd) key in the drivers side door in the lock position and hold it there for approx thirty seconds and then the ECM? RCM? Skreem? clicks and RESETS( something re security?) Then I turn the ignition switch to the off position( key in door is out) and then to the start position and the car will start. Once in awhile I need to take the battery cables off and then go through the same sequence, and whala, it starts!

No check engine or codes show!
Battery checks!
Key FOB's are working( lock, unlock, start etc)!
Checked fuses!

It's seems to be something that is RESETTING! Dreading having to take it to a dealer!

What is it?

Thanks!
bahston