thanks! I think you might be right, just haven't had the chance to verify.You could have some pressure build up in the aux lines, If it sees any pressure in the aux lines and you don't press the aux bypass button it will shut down when you take off the seatbelt. Try pressing the bypass before you take off the seatbelt. If this is what it is you should be able to turn the key on without starting and work the aux controls back and forth, it should relieve the pressure. This has happened to me a couple times on my ct322. I think they have the same controls.