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elijahbird7

Door/Handle Touch Unlock

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Had to go back out for dinner.  Rear door did not unlock again.  I tried the interior lock/unlock like I did before, and this time it did nothing.  When I got to the restaurant, I tried it again and still did not work.  Came back out to go home, and still would not unlock.  Got home, touched the rear door handle and it did unlock, so have no idea what is causing this issue.

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21 hours ago, elijahbird7 said:

It has been working every time until today when I was headed out to lunch...

I think I figured out your problem... you have these unlocking problems every time you go to lunch or get pizza. I think your car is telling you to loose weight! 

 

Sorry... couldn't resist!

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Well, since I only weigh 160lbs, don't think so.  I contacted the Service Manager again this morning by email.  He suggested I change the battery in the Key Fob to see if that could be an issue even though I haven't gotten a notice on the dash to replace it.  Of course the Owner's Manual does not tell you anywhere what the battery number is. You have to take the Key Fob apart to get the number which is 2450.  I did replace it and he said to check the voltage on the original battery, which was showing 2.5W.  The new one will be 3.0W, so who knows if that was low enough on the original battery to cause this issue.  My Nautilus was only 1 year old on March 1st.

And of course this morning when I was going out to get the new battery, touching the rear door handle it did unlock.

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Went out today, touched the rear door handle, and did not unlock.  Touched both door handles on passenger side, and didn't unlock.  Went to a gas station, and touched the rear driver's side handle and it did unlock.  Tried it 4 other times running errands and it never unlocked, so changing the Key Fob battery was not helping at all.

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Sounds like you have a very vile & heinous gremlin playing with your mind.

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And you made sure there wasn’t anything else electronic on you or in the vehicle, right?

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Nothing else electronic on me except for my phone that has always been with me and is connected to the Nautilus. I even went out later today and got another new Key Fob battery just in case the other new one had an issue.

I played around with that rear door handle many times.  Sometimes if it wouldn't unlock from putting my hand in the handle from the top, then if I tried from the bottom, it would unlock.  Then if I tried from the bottom and it wouldn't unlock, then from the top it would...really crazy.

Also many times pushing that lock area on top of the handle, and about half the time it would lock and half wouldn't....

I am almost thinking the rear handle either has an electrical connection issue or just needs replacing.  That would be very odd, since the left rear door handle had to be replaced on my '16 MKX after causing the alarm to go off for no reason.  I took it in 5 times before they figured out it was causing the alarm to go off and then replaced it.

 

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Just for grins try cleaning the inside of the handles really well.

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Actually did that 2 days ago.  I emailed the Lincoln Service Manager about what experiences I had with it today, expecting he would reply tomorrow, but he emailed me right back.  At some point he wants me to bring it in.  We decided to wait awhile to see where this "virus" situation goes since it's not something that needs to be fixed in high priority.  He said it could be a module or an issue with an electrical connection somewhere in that door.  Time will tell.

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11 hours ago, elijahbird7 said:

Actually did that 2 days ago.  I emailed the Lincoln Service Manager about what experiences I had with it today, expecting he would reply tomorrow, but he emailed me right back.  At some point he wants me to bring it in.  We decided to wait awhile to see where this "virus" situation goes since it's not something that needs to be fixed in high priority.  He said it could be a module or an issue with an electrical connection somewhere in that door.  Time will tell.

 

Most likely the module - I think it may be in the Body Control Module.  If it was a wiring problem or sensor problem it should affect both doors on the same side but not the other side.

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Staying home mostly, virus scares and crappy spring weather.  I made an appointment on Tuesday morning to take it in for the service department to figure out what the issue with that non/unlocking door handle is.  I heard the word "module" as a possibility.  Will reply once it gets fixed.

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I went into my garage a few days ago and placed my keyfob and phone next to each other near the car while I put my boots on. The welcome lighting started cycling on, off, on, off as the phone interfered with the fob and made the car think it was coming in and out of range.

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Took it in yesterday morning and locked it when I got out and handed the Service Manager the key and he touched the rear door handle and luckily it didn't open for him.  Gave me a Nautilus loaner and off I went.  About 11:00am he called and asked me if I ever don't start it for 5 days or more.  I told him of course I do, since in crappy salt/snow on the road, I stay home, and in the summer I may not start it for 3 to 4 weeks since I have all my old cars out.  He said that after not starting it for 5 days or more, when you walk up to the car and touch a rear door handle, it will not open the doors for a battery saving situation?.  I then asked him why after I have started it, no matter how long since it has been started, then stop somewhere, touch the handle and it doesn't unlock, then drive home, touch it again and it doesn't unlock.  Had no answer to that, and I heard nothing from him today, so am hoping maybe that had to order some module or other part. Once I get it back, I will post the solution if there is one.

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Got the Nautilus back early afternoon.  They could find nothing wrong except the battery needed charging.  They say if it is not started and driven more than 5 days, some of the electrical modules turn off to save the charge, so that may be contributing to the issue. 

I did tell him something else that he found interesting.  I turn off that Auto Start/Stop most of the time when I start the car, and when I do forget to turn it off, it does not do the Start/Stop automatically again until I have started it about 4 more times without turning it off, and there is a "White A" with a white circle around it on the lower left side of the dash when I stop.  He said to try not using it again and see how many times I start it before it automatically goes back to working.  I did not turn it off when I left the dealer and drove around 17 miles home, stopping at many lights and the engine not turning off the whole way home.  So we'll see what happens and if he thinks it has any connection.

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Did you ever sort this problem out Elijah? I recently purchased a Certified Preowned 2018 MKX and am having the same issue. It worked fine for the first few weeks, then all the other doors besides the driver's stopped unlocking when I touched the handle with the key in my pocket (or hand). The driver door will work 100% of the time. The other doors only work sporadically. And either they all work or none work (excluding the driver door which always works).  I have tried all of the tricks I can think of. Most of which you have described here. I have a heated garage and drive regularly. I have tried both fobs, one of which is brand new. Any help would be greatly appreciated.

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I finally decided to attach the Battery Tender to it when sits and I'm not driving it for several days.  Now it always works

 

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Glad it’s working for you!
 

Slightly off topic, but saw this referenced earlier in this thread. Anyone have any ideas on how to more easily get at the rear negative battery terminal? Doesn’t seem easy to disconnect. 

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The battery in my early production (September 2015) MKX 2.7 was sounding a bit weak at starting the engine on recent cold mornings, so I decided to replace it as a preemptive measure at ~ 38,000 miles. As a DIY owner, I examined the battery removal scenario, reviewed some online videos, etc. and decided to let the shop do the replacement for $19 instead of my messing with it. The issue with the rear terminal and the fact that I hate working on freezing cold mechanical details prompted my decision. A discussion with the mechanic confirmed that the MKX battery location offers some obstacles, but it helps a lot to remove the air filter so that the battery can be slid forward rather than awkwardly lifting it up-and-over the filter housing at an angle.

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Thank you Cosmos36.

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