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Unable to unlock via phone after MCU replacement

Discussion in 'Model S' started by sku100, Jul 29, 2018.

  1. tranzndance

    tranzndance Member

    Joined:
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    Bay Area
    My pickup involved getting the fob from the trunk which the app was supposed to be able to open. It didn't open and unlock didn't work, and lock and valet mode could be enabled. I stayed at the service center until the issue was resolved. It involved the tech doing something that required waiting for 15 minutes and then rebooting the car.
     
  2. reddy

    reddy Member

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    Jan 26, 2013
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    Amarillo, TX
    After calling Tech Support to ask to have the MCU Command Key reset, I expected they would do it remotely similar to others here.

    I’m not sure if they actually tried a remote reset. The sent a Ranger out to reset it with his laptop, and it took him about 5 minutes.

    The reset didn’t work instantly. By the time I had a chance to test it again an hour had passed and it worked just like new.
     
  3. tranzndance

    tranzndance Member

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    When I had it done, I was told to wait at least 15 minutes and then reboot.
     
  4. Knightowl

    Knightowl Whovian

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    Colorado Springs
    appreciate the info, same issue since mcu was replaced 3 months ago and they could not fix remotely or by ranger saying it needed to go back to the SC, well it is there now for the HV battery having failed so let them know the fix per the info here :) sheesh Tesla
     
  5. reddy

    reddy Member

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    FWIW, I didn’t reboot and it worked fine. Perhaps the Ranger did the reboot for me. I know it didn’t work 5 minutes later, and he was long gone by the time it started working.
     
  6. allenshaw

    allenshaw Member

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    Sep 7, 2019
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    Location:
    Dallas TX
    I just picked up my car from the Dallas SC this morning after an MCU replacement and my app was also unresponsive as far as unlocking the doors. SC locked the key in my car for me to pick up so I didn’t have a choice but to wait for one of their employees to help. The guy who helped me described it as needing to “reset the token”, he brought a laptop out there and I was good to go in 5 minutes. According to them it cannot be done OTA but can be done mobile if needed.

    Mine is a 2013 P85 and they just replaced it with a 1004740-10-A MCU under CPO warranty. Got a free LTE upgrade :) Hope this helps.
     
  7. cybergates

    cybergates Member

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    so having same issue - been 2 days chatting iwth tesla on the service messaging section of app - I just let them know "reset MCU commands key" phrase - it sounds like mine's been escalated to higher tech support.
     
  8. reddy

    reddy Member

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    For whatever reason, Tesla insisted on sending a Ranger out to connect to my car to do this. Perhaps they can't always do it remotely. I didn't care how they did it, as long as it got done.
     
    • Informative x 1
  9. gwxfer

    gwxfer Member

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    Europe
    Service can restore this with toolbox.
     
    • Informative x 1
  10. cybergates

    cybergates Member

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    update: yeah finally it fixed remotely! Took a week and lots of chatting on the "messages" section once you create an appt. The person who fixed it from the virtual diagnosis team (based out of Pomona, CA in my case) called it the "remote security reset" and I did have to delete my app and re-install it and now all functions of the app are working including opening trunk and unlock which had stopped working.
     
  11. Sfallert

    Sfallert Member

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    Jul 23, 2019
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    Location:
    Denver
    My unlock stopped working somtime last week, I just thought it was a bad update.
     
    • Like x 1
  12. cybergates

    cybergates Member

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    that's what I thought too - as I'm pretty sure it WAS working OK after the MCU2 update (whereas most of this thread is where it isn't properly setup after the MCU2 update). Anyway, Tesla pushed the firmware update again and then another update to me via the service chat - that didn't fix it so they escalated it as above and it took little over a week to get it working finally.
     
    • Informative x 1

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