Door lock from inside
It seems that there are enough of us in this thread with the same “
factory-alarm-triggered- at-5 o’clock-in-the-morning-by-opening-the-driver’s-door-lock-of-an-MX6-during-the-winter”.
I couldn’t fully understand what everyone of you were saying in your posts because now I realize I suffer some kind of dyslexia, but to simplify things a little bit, I’ll assume that all of us have the same problem of our alarms triggered by ourselves, and we are already tired of temporary solutions like trying to open the car from the passenger side, or rapidly opening the hood to disconnect the battery so the neighbors won’t curse us once again, not to count tricks like removing ice from the door lock or warming it up somehow, or having already ordered another key from the dealer or getting another copy from Walmart or the local locksmith.
So I guess most of you have already disconnected the hood latch sensor. I already did it, and I’ve had peaceful mornings. But still the final solution depends on fixing the door lock.
I don’t know how the door lock works in concert with the factory alarm. And that’s one reason I haven’t attempted fixing it, the other reason being the cold outside. But to get things going, let’s assume for a moment that because of the extreme cold during this winter, rust and wear accumulated for more than 10 years of useful life of our Mx6’s, the door lock is in a position to trigger the alarm. No brainer here.
Let me put forward this hypothesis. Let’s assume that inside the door lock 2 things need to rotate when the key is turned to open the door. Because of wear, ice and rust, those two things got into a position that is interpreted by the ECU as unauthorized entry. In my opinion, the solution is to figure out what needs to be realigned to allow the lock not to trigger the alarm when the key is turned (greasing with WD-40 doesn’t do it), or to make those 2 things to rotate at the same time. This picture in the Haynes manual is the best information I could find. The workshop manual doesn’t have anything better. Any ideas?.
EDIT: I just recalled that I'd seen this TSB for Ford Probe about greasing the door lock cylinder. I haven't really tried because I presume it's not going to work. But I'll share it with you in case anybody has success with it.