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Unable to unlock via phone after MCU replacement

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

  1. sku100

    sku100 Member

    Joined:
    Jan 28, 2017
    Messages:
    30
    Location:
    Kansas City
    Recently my AP2 90D center screen would not come on, or reboot. The MCU and screen (had the yellow line around the edge) were replaced under warranty. Now I can't unlock the car or open the trunk via the app, but sunroof will still vent and close. I have checked every setting I can think of and still cannot fix this. Any ideas? Back to the Service Center?
     
  2. sku100

    sku100 Member

    Joined:
    Jan 28, 2017
    Messages:
    30
    Location:
    Kansas City
    In TeslaFi i get:

    "CSRF check failed. Your form session may have expired, or you may not have cookies enabled."

    It will still honk the horn and flash the lights, but not unlock the doors or turn the AC on.
     
  3. Atlantan

    Atlantan Inactive Member

    Joined:
    Jun 8, 2016
    Messages:
    248
    Location:
    Gwinnett County
    Same here, after MCU replacement can't unlock car using iPhone App. Will be taking it in for annual service soon and will report it to the service advisor.

    Hey, Olathe is my old stomping ground...college and business school.

    Cheers
     
    • Like x 1
  4. appleguru

    appleguru Member

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    908
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    Try resetting your tesla password if you haven’t already.
     
    • Like x 1
  5. Atlantan

    Atlantan Inactive Member

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    Location:
    Gwinnett County
    Thanks for the suggestion...password reset gave same results. App prompts me with are you sure....sends the signal, but car doesn't unlock, or trunk doesn't open.
     
    • Like x 1
  6. sku100

    sku100 Member

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    Jan 28, 2017
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    Location:
    Kansas City
    Unfortunately, that didn't help. I noticed today that if I send "Lock" from my phone the lights flash but the doors don't lock. The car is clearly receiving the signal, but does not want to lock or unlock the doors. I looked at all the controls and settings again, I can't figure out what's not set correctly
     
  7. LukasSwan

    LukasSwan Member

    Joined:
    Nov 18, 2016
    Messages:
    139
    Location:
    Halifax
    I had these issues after screen replacement.
    It is due to new software enforcing rules about the MCU number. You need a tech or engineer to login to the car (plug their laptop in) and update the car to recognize the new screen security. It took about 5 minutes and everything worked great for me. Try keyless driving and it won't work either.
     
    • Informative x 3
    • Like x 2
  8. sku100

    sku100 Member

    Joined:
    Jan 28, 2017
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    Location:
    Kansas City
    Follow up:
    I called the service center. It took them about a week, but they fixed the problem remotely.
    The app is working normally again.
     
    • Helpful x 1
    • Like x 1
  9. Vux007

    Vux007 Member

    Joined:
    Dec 9, 2017
    Messages:
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    Location:
    USA
    Hi there! I believe I have the same exact issue. Can you tell me how you described the problem to the service center, or what technical phrases they used to describe the problem? That way I can phrase it in a way that they will understand exactly what to do. Thank you!
     
    • Like x 1
  10. appleguru

    appleguru Member

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    They need to "Reset your MCU commands key"
     
    • Helpful x 2
    • Like x 1
  11. Vux007

    Vux007 Member

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    Dec 9, 2017
    Messages:
    67
    Location:
    USA
    I submitted a Service request via the Tesla app. Within a few hours, they sent me a text message saying they had reset the MCU Commands Key, and it WORKED!!! Hot damn I love Tesla!!! Thank you!!!
     
    • Like x 2
    • Informative x 1
    • Love x 1
  12. bmah

    bmah Moderator, Model S/X, California Forums

    Joined:
    Mar 17, 2015
    Messages:
    3,349
    Location:
    Lafayette, CA, USA
    I had this problem for awhile (can't remotely unlock / open) after an MCU replacement two months ago. Got it fixed remotely this week. (The delay was mine, not Tesla's)

    Bruce.
     
    • Like x 1
  13. Cyril9206

    Cyril9206 Member

    Joined:
    Jan 3, 2020
    Messages:
    6
    Location:
    Nancy
    I had the exact same problem : No FRUNK, TRUNK, Opening via iphone App.
    Moreover when i'm trying the Smart Summon, the car tells me "No key detected".
    Gonna try this solution with service Center...

    Thx for clue... I'll let you know..

    Cyril
     
  14. neverdone

    neverdone Supporting Member

    Joined:
    Jan 9, 2016
    Messages:
    145
    Location:
    Loveland, CO
    Same problem after MCU replaced in our 2016 X. I sent an email and was fixed early the next morning. I use the magic sentence:
    "Reset your MCU commands key".
     
    • Like x 1
  15. xAgyex

    xAgyex Member

    Joined:
    Jan 22, 2018
    Messages:
    142
    Location:
    Baltimore
    Same issue for my 2014 MS85 AP1. They replaced my failed MCU with a refurbished MCU and now having this issue. I have reported to them via iOS app and even visited the service center. Still no resolution...3 weeks and counting. I am now totally fed up with Tesla Service..because this shouldn't even be an issue. It is super simple fix, and or shouldn't have even occurred. I really really hope something big happens to Tesla so they can fix their service.
     

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