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 and becoming a Supporting Member. For more info: Support TMC
  1. TMC is currently READ ONLY.
    Click here for more info.

Consolidated eMMC Thread (MCU repair) (Black Center Screen)

Discussion in 'Model S' started by Wiki, Jan 8, 2020.

Thread Status:
The first post in this thread is a WikiPost, and can be edited by anyone with the appropriate permissions.
  1. MikeBur

    MikeBur ManualPilot

    Joined:
    Dec 8, 2014
    Messages:
    1,369
    Location:
    Seattle, WA
    #101 MikeBur, Feb 5, 2020
    Last edited: Feb 5, 2020
    Actually doesn’t call out what wear leveling techniques to use, so useful info for general don’t do stupid, though the heuristics used for wear- leveling is what I’m calling out.

    Whacky-leveling technique as in moving stable, static, data to high wear level areas to enable the higher frequency writes to be written back to lower write tagged areas. The more usual wear leveling techniques is prioritizing choice of available blocks. I don’t know which heuristics are being used.

    Edit: this has more info:
    https://www.micron.com/-/media/client/global/documents/products/technical-note/nand-flash/tn2942_nand_wear_leveling.pdf

    Notably a lot depends on the available blocks. Moving data from low-wear level would require a level of software which may happen in the controller (italicized text)
    Depending on the wear-leveling method used, the controller typically either writes to the available erased block with the lowest erase count (dynamic wear leveling); or it selects an available target block with the lowest overall erase count, erases the block if necessary, writes new data to the block, and ensures that blocks of static data are moved when their block erase count is below a certain threshold (static wear leveling).
    Net: it depends. If we knew the controller we could dig more, though is not beneficial as the damage was done through poor logging choices and exacerbated by the small physical nand size and wear count mtbf
     
    • Like x 1
  2. Slexs

    Slexs Member

    Joined:
    Jan 27, 2020
    Messages:
    35
    Location:
    Kristiansand Norway
    Out of curiosity, does anyone know if i can dissassemble a 4g modem from a donor car and swap out my 3g modem with it? Would the sim from the donor car work at all in mine?
     
  3. rsg123

    rsg123 Member

    Joined:
    Jan 1, 2018
    Messages:
    510
    Location:
    Sacramento
    Just picked my car up from @TonyT for the MCU repair. It’s such an improvement. I’ve never seen the LTE reception at 5/5 bars before this. Streaming is so much better now—songs will load even with poor reception. The screen is super responsive. He also noticed my bubbling IC and offered to replace it at a reasonable cost. That alone is a night and day difference.
    Added bonus: the red line across the main screen that I’ve posted about previously is now gone. So it must have been caused by a loose connection somewhere.
    Tony worked with us on coordinating the repairs with my family’s Disneyland visits (Disney is 20 minutes away from his place). He made it very convenient and now I don’t have to constantly worry about the MCU completely failing. I’ll be turning scheduled charging back on. Great overall experience. Highly recommended.
     
    • Like x 9
  4. CravingMender9

    Joined:
    May 13, 2019
    Messages:
    104
    Location:
    Charlotte, NC
    The hardware should work, not sure about SIM. In any case, the whole kit goes for $109 (SIM is just $18 out of it) new directly from Tesla. Unless it is drastically cheaper, you can look into getting it from them. There's another thread for LTE upgrade where I and others have posted the part numbers. Feel free to take a look. On cellphone, so unable to post it here easily.
     
    • Informative x 2
  5. EV-Fixme

    EV-Fixme Vendor

    Joined:
    Oct 24, 2019
    Messages:
    580
    Location:
    Orange County, CA
    Thank you, pleasure to help. Finally! Someone went to Disney and got their MCU fixed :D
     
    • Funny x 3
    • Like x 2
  6. EV-Fixme

    EV-Fixme Vendor

    Joined:
    Oct 24, 2019
    Messages:
    580
    Location:
    Orange County, CA
    You need the new sim. I heard some ServiceCenter will sell the sim if you bring your old one in for exchange.
     
    • Informative x 1
    • Like x 1
  7. brkaus

    brkaus Well-Known Member

    Joined:
    Jul 8, 2014
    Messages:
    7,626
    Location:
    Austin, TX
    So, Tony brought the romance back into your life? :p
     
    • Like x 3
    • Funny x 1
  8. EV-Fixme

    EV-Fixme Vendor

    Joined:
    Oct 24, 2019
    Messages:
    580
    Location:
    Orange County, CA
    It's amazing what the right tools can accomplish ;)
     
    • Funny x 3
    • Like x 1
  9. olsch01

    olsch01 Member

    Joined:
    Jan 17, 2018
    Messages:
    10
    Location:
    Charlotte, NC
    Just had my MCU replaced - went out last week luckily since my warranty is up on 2/14!

    One thing I haven't seen discussed that I'd like to throw out there - for those of us with current units or who had them replaced by the Service Center - we're still at the mercy of 8 Gig cards. Has anyone found a way to get all of this data logging to redirect to a USB stick? I'd happily give up one of my two USB ports if I could just burn up a *removable* usb stick vs. the onboard eMMC. I'm fairly linux proficient but haven't dabbled with the MCU system at all - but those that have may have found a way to modify the fstab settings to mount the /var/log folder to an external drive?

    Just thinking out loud and curious on thoughts since I hadn't seen this mentioned in the thread :cool:
     
  10. Cavell219

    Cavell219 Member

    Joined:
    Jun 22, 2019
    Messages:
    33
    Location:
    Indiana
    My windows worked fine without the MCU. But yes no HVAC, autopilot, nav etc. Also no 12V from the cigarette lighter which was weird.
     
  11. EV-Fixme

    EV-Fixme Vendor

    Joined:
    Oct 24, 2019
    Messages:
    580
    Location:
    Orange County, CA
    That 12V is mcu controlled I think. @olsch01 that is 1 way to help, however that requires you to start modifying things. This offering is stock so does not change anything from what is Tesla normal, other than much more space.
     
  12. Banjo

    Banjo Member

    Joined:
    Mar 18, 2018
    Messages:
    45
    Location:
    USA
    Is there anybody near El Paso that can do the eMMC repair? Albuquerque? Phoenix? If not, anybody that I can overnight my chip to and repair/send back? Prices? Any/all help is appreciated.
     
  13. EV-Fixme

    EV-Fixme Vendor

    Joined:
    Oct 24, 2019
    Messages:
    580
    Location:
    Orange County, CA
    We can help, I'll pm you
     
  14. mambro

    mambro Supporting Member

    Joined:
    Mar 13, 2018
    Messages:
    122
    Location:
    McKinney, TX
    • Informative x 1
  15. Banjo

    Banjo Member

    Joined:
    Mar 18, 2018
    Messages:
    45
    Location:
    USA
    Anybody know where I can get the longer torx screws for holding the MCU to the car? One of mine was in bad shape. Also, I had to slot two of the tiny screws that hold the case of the MCU to the screen, and one stripped out pretty bad. Looking for a few of those as well.
     
  16. CravingMender9

    Joined:
    May 13, 2019
    Messages:
    104
    Location:
    Charlotte, NC
    You can get it from any Tesla service center.
    The longer one is
    Part: BLT,PFLG,TRX,M5x25[08.8]-05
    Part Number: 1008884-00-C

    Smaller one mostly:
    Part: SCR,M5X6.PH.TRX25.SST.W/PATCH
    Part number: 1010058-00-A
     
    • Helpful x 2
    • Informative x 2
  17. David_Cary

    David_Cary Active Member

    Joined:
    Dec 17, 2012
    Messages:
    1,139
    Location:
    Cary, NC
    It would be great to have a summary of behaviors to minimize eMMC writes and also some idea of effectiveness.
    I have a 5/15 build with 82k miles.
    I don't have any obvious problems but I am 100% streamer and have used my share of Nav.
    I can switch to phone for music and avoid nav (need to shut off the nave that comes on every day to take me to work). Does that get me to very little writes?
    What else reduces writes?
    I should probably just do a preemptive fix soon but if someone told me that no nav and no streaming meant 1 write a month, then I might just do that for awhile.
    I live 3 hours from WK057 and can drop the car off very easily in July, so that is my current plan.
     
    • Like x 1
  18. EV-Fixme

    EV-Fixme Vendor

    Joined:
    Oct 24, 2019
    Messages:
    580
    Location:
    Orange County, CA
    According to WK057 page he does not do advanced swaps, only after they go bad. Streaming, games, map tiles loading. Everything uses it. One of the big complaints is slower map tiles loading. As long as your proactive when you start having issues, your recovery should be good. Many people reported the new eMMC was much faster than their old one, so there is benefit to early replacement.
     
    • Helpful x 2
  19. dfdtruckie

    dfdtruckie Member

    Joined:
    Jun 1, 2013
    Messages:
    116
    Location:
    Denver
    Anyone in Colorado that can do this repair?
     
  20. dfdtruckie

    dfdtruckie Member

    Joined:
    Jun 1, 2013
    Messages:
    116
    Location:
    Denver
    Sorry if this has been answered. I have a 13'. Could I just install a MCU and screen from a 2017' on up to 2020 address this eMMC?
    Thanks
     
    • Funny x 1
Thread Status:
The first post in this thread is a WikiPost, and can be edited by anyone with the appropriate permissions.

Share This Page

  • About Us

    Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.
  • Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


    SUPPORT TMC