The new ECM arrived today. My install / program appt. is scheduled for 1 week from today. If I install the ECM to verify it resolves the fan issue, will it try to wipe the keys? I just want to make sure if I put it in, verify the fan issue that I can then put in my old ECM (the one programmed to my keys and cluster) and drive the car to the dealership. I just want the verification ahead of time that the issue is indeed the ECM since I now have the new one in-hand.