TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker or making a Paypal contribution here: paypal.me/SupportTMC

Dead battery in Key fob locked out of Model X

Discussion in 'Model X: User Interface' started by bikeandsail, Oct 10, 2016.

  1. bikeandsail

    bikeandsail Member

    Joined:
    Dec 23, 2013
    Messages:
    107
    Location:
    United States
    I tried to lock my Model X and it failed to lock with the key fob. I assumed the fob battery might be dead so I tried the other fob and determined it was a dead battery. I then followed the instructions in the O&M manual to hold the fob with the dead battery near to bottom of the door post on the drivers side to see if I could unlock. No luck. I tried numerous positions and it would not unlock.

    I am now worried that if I am not carrying my cell phone with me and my fob goes dead I will not be able to get into the locked car. Many times I do not carry my cell phone or leave it in the car.

    Has anyone had luck with unlocking the car with a dead fob battery?
     
  2. fallen888

    fallen888 Member.. hehe, I said "member"

    Joined:
    Jul 27, 2016
    Messages:
    465
    Location:
    Philly(ish), PA
    How does one not carry their phone on them in 2016? :)

    Also, don't you have a second fob?
     
  3. swesson

    swesson Member

    Joined:
    Aug 17, 2015
    Messages:
    120
    Location:
    Denver, Colorado
    I haven't had a dead battery, but the last time my car was in the SC, they changed out the firmware in the fob. They said they did this to prevent a battery drain problem. They also put new batteries in both fobs. I suggest you take it in to the SC.
     
    • Helpful x 1
  4. qadaemon

    qadaemon Member

    Joined:
    Jul 29, 2016
    Messages:
    112
    Location:
    Sidney IL
    Unfortunately had to deal with this a lot when we first got the x. The magic spot is below the fw door on the body cladding close to where the two doors meet. Push the door button several times as you move the key around and it will eventually open.
     
  5. aesculus

    aesculus Still Trying to Figure this All Out

    Joined:
    May 31, 2015
    Messages:
    1,958
    Location:
    Northern California
    You cannot open the car with a dead fob. I too had locked my phone in the car and the fob died. Luckily I had my wifes phone to call Tesla and then we also had to get the app working on her phone so we could drive home.

    BTW it may not be a dead battery. My fobs had to be reprogrammed. Pulling the battery, waiting 10 seconds and inserting it was enough to get it working again. This went on for a few months until I had them reprogram both fobs for a second time.
     
  6. bikeandsail

    bikeandsail Member

    Joined:
    Dec 23, 2013
    Messages:
    107
    Location:
    United States
    I am the one that started this thread. The original question was has anyone had any luck trying page 10 of the manual (attached). This is a procedure that SHOULD open the car with a dead battery. I could not get it to work. Has anyone else tried this?
     

    Attached Files:

  7. CmdrThor

    CmdrThor Member

    Joined:
    Jul 24, 2013
    Messages:
    854
    Location:
    Marietta, GA
    One other thing you could do is keep a spare fob battery in the frunk. I have two spares in the glove box, but obviously that wouldn't help if you can't get the car unlocked ...
     
  8. McRat

    McRat Active Member

    Joined:
    Jan 20, 2016
    Messages:
    1,253
    Location:
    Norco, CA
    I usually don't. My house has a phone, my work does, my wife has a phone, my cars have all have phones integrated in them, I don't talk on the phone when I'm on a motorcycle or bicycle, nor do I talk on the phone in public anyways, it seems to be rude to both the caller and the people around you.

    It's funny sometimes. Before we were married, my wife was with me, and my cellphone rang. She asked, "aren't you going to answer it?", and I replied, "the phone exists for my convenience, not the convenience of others." You've probably met folk like that and didn't even know it. You don't see their phone, you don't hear their phone, and you've never witnessed them talking on a portable phone in public, just like you probably never seen them have a bowel movement either. It does happen, it just happens in private.
     
  9. qadaemon

    qadaemon Member

    Joined:
    Jul 29, 2016
    Messages:
    112
    Location:
    Sidney IL
    Yeah it's a pain, but it works on mine, even with a battery out of the key. I'd get the SC to demonstrate it to you to verify it works on your car too. Related: if you put the key in the armrest cup holder or the very back of the console by the USB ports, it will start the car with a dead key battery.
     
  10. bikeandsail

    bikeandsail Member

    Joined:
    Dec 23, 2013
    Messages:
    107
    Location:
    United States
    Thankyou Qadaemon!

    I will have to try it again. It is a procedure worth learning.
     
  11. aesculus

    aesculus Still Trying to Figure this All Out

    Joined:
    May 31, 2015
    Messages:
    1,958
    Location:
    Northern California
    My point was that it might not have been a dead battery. This statement does not state you swapped batteries or put in a new battery. The fobs have been known to go brain dead even with a good battery. When they do this they have to be 'rebooted'. That's as simple as removing the battery and replacing it after about 10 seconds.

    The procedure on putting the fob in various places will work with a dead or almost dead battery, but not one where the fob has locked up its logic.

    This is a known problem and Tesla claims they have a fix for it.
     
    • Informative x 1
  12. bikeandsail

    bikeandsail Member

    Joined:
    Dec 23, 2013
    Messages:
    107
    Location:
    United States
    I threw my dead battery out but tried like you said without the battery. Could not get it to unlock the car or start the car. Guess I will ask next time at the service center for a demo.
     
  13. Softwizard

    Softwizard Member

    Joined:
    Feb 19, 2014
    Messages:
    121
    Location:
    Keller, TX
    Unrelated to unlocking the MX without the keyfob, I noted that within 3 days of receiving 8.0 software, my primary keyfob battery died. It actually died while we were out driving around and had stopped. Luckily, I had my iPhone and used the app to unlock and start the MX. I now have bought an 8-pack of the CR2354 batteries to key around for future emergencies.
    https://www.amazon.com/gp/product/B00KFSUIC2/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

    I think the 8.0 software is making keyfob batteries die quicker.
     
  14. Calgary

    Calgary Member

    Joined:
    May 11, 2016
    Messages:
    13
    Location:
    Calgary
    I also had my fob go completely dead just a week or so after version 8.

    Other fob worked fine. No luck on the hold close to body trick but I did not try all that hard since I had fob #2 close at hand.

    After running around looking for a new battery I decided to just switch the battery from my other fob. Worked great.

    But then so did the other fob with the "dead" battery out into it!!

    In the end it just took pulling the battery and reinserting it to work fine.




     
  15. aesculus

    aesculus Still Trying to Figure this All Out

    Joined:
    May 31, 2015
    Messages:
    1,958
    Location:
    Northern California
    As I posted up thread you need to have your fobs reprogrammed. This is a known problem. The fobs go brain dead and pulling the battery and replacing it resets it.
     

Share This Page