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Likely MCU Failure (MCU1 eMMC)

Discussion in 'Model S' started by Jkaufm32, May 15, 2019.

  1. Dysong1

    Dysong1 Member

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    It's not 'bricking', it's just that the screen doesn't work (and thus any associated functions). Just happened to me this past weekend; my car's flash memory seems to have died right after overnight downloading of V10 update (2014 Model S).

    The software won't boot up, screen just perpetually shows the T logo. I can still drive, but can't control the heat or AC, music, etc. Some of the scroll wheel functions (like sunroof) will work one day, and then it won't the next. Taking it to the service center next week, but I'm pretty sure it's the eMMC. Wife won't let me download new software to her MX because she's afraid it will happen to hers as well.
     
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  2. hpartsch

    hpartsch Member

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  3. demundus

    demundus Active Member

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    My dude... you just take the part out of the MCU. Its like 6x6 inches. I mailed mine to @tedsk and he mailed it back.

    Tadaaaaaa
     
    • Like x 3
    • Informative x 2
  4. Vinc

    Vinc Member

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    Interesting. They say that the affected cars won’t charge either. Wondering if that is just miscommunication/telephone game...
     
  5. aerodyne

    aerodyne Member

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    I read the same article today.

    Short answer is NO.

    After the unofficial spanking the MS with plaid mode gave to the Taycon today, the media is desperate to portray a "balanced" viewpoint ..
     
  6. BPeter

    BPeter Member

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    Yes, lots of older Model S cars have this issue and it seems that unless something gets changed all of them will experience the issue. It's $2000 fix from Tesla, or a $400ish fix from third parties, but unless you live near one of the few third parties that know how to do the fix you'll have to get comfortable taking your dash apart to get at the MCU.

    Elon tweeted that it should be "better from now on" but wk057 (one of the people that knows how to fix this) says it hasn't been fixed on any public firmwares yet.
     
    • Informative x 3
  7. Ludalicious

    Ludalicious Member

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    Let's face it some of these cars cost upwards of 215k CDN brand new 4 years ago. Yes vehicles of this caliber price will require a large wallet to maintain after its 4-5 years old. Let's be honest. 1,200 US for a screen or 150 for a door handle assembly. Lots of used parts available online. Allot of DYI you tube videos on how to replace them with simple hand tools and a few hours... Jalopnik write ups are for trolls.

    Let's look at a 5 yr old Mercedes diesel engine.... 35k CDN later...
     
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  8. David29

    David29 Supporting Member

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    Ahh! I posted in another thread just this morning that my Model S had a hiccup of some sort when trying to install V10 (2019.32.12.1). The installation got to 60% and stalled there. Like you, I was able to drive the car, with no functions of the center screen. I posted, hoping that someone would have some experience with a software installation that stalled, but so far I have just one or two suggestions that it might be a failure of the flash memory, a failure I had not heard about until today.

    What to do when a software update stalls or fails?

    The phone still says "installing" tonight and shows status of 60%, some 20 hours or so after it began the install. I plan to go to the service center tomorrow to ask what i should do. Sadly, my car is 3 weeks out of warranty...!
     
  9. Ludalicious

    Ludalicious Member

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    Sometimes if it's only a few weeks out of warranty they will still honor it.
     
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  10. hpartsch

    hpartsch Member

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    How long did it take to fix it?
     
  11. hpartsch

    hpartsch Member

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    #91 hpartsch, Oct 16, 2019
    Last edited: Oct 16, 2019
    Mine just died in Sept. The car is a 2013 w/ 64.5k miles at the time.
     
  12. scottlawson

    scottlawson Member

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    More specific info about the problem here from Rich Rebuilds YouTube in May: (about 9 minutes in)
     
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  13. P100D_Me

    P100D_Me Member

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    It did? Any links?
     
  14. bob_p

    bob_p Active Member

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    Our 2012 S P85 had almost 100K miles when it was traded in last year in June 2018 - and we didn't see that issue.

    However, because of the screen bubbling issue with the early MCU1 displays, the MCU/display had been replaced around 50K miles - so we may have been lucky not to encounter the flash memory problem because we didn't have an MCU1 long enough to encounter the problem.
     
  15. dark cloud

    dark cloud Active Member

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    Here
     
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  16. Barry

    Barry Active Member

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    That was the old Tesla. Goodwill repairs have pretty much stopped.
     
  17. realvvk

    realvvk Member

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    My MS was seemingly dead after V10 upgrade, too. Both screens off, then instrument cluster booted up but the center screen was dark and unresponsive. I immediately thought eMMC failure after it did not seem to respond to a two wheel reboot. It came back after a while.
     
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  18. aerodyne

    aerodyne Member

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    Perhaps...depends on the SC and your attitude. If you document the problem with them before the warranty runs out that helps too...
     
  19. StarLog

    StarLog Supporting Member

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    I posted this same thing yesterday,

    MCUv1 eMMC
     
  20. ajdelange

    ajdelange Banned

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    Flash RAM starts failing after a certain number of write cycles. The average driver drives an average number of miles per year and the RAM logs as average number of events so there is an average number of write cycles per year to the RAM and a MTTF but the TTF is random. It can happen earlier than 4 years or later than 4 years depending on how much you drive and how much logging was actually done.
     

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