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

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

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

    Wiki Member

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    #1 Wiki, Jan 8, 2020
    Last edited by EV-Fixme: Mar 29, 2020 at 11:15 AM
    I'm starting a new thread with all the important information up top to make it easier for people and links to all the important threads. I will be maintaining information on this page to make it easy for people to find all the info without having to read 100's of posts.

    IMPORTANT! Recently we have noticed a much higher rate of eMMC with no data to recover. If you are planning to have your chip replaced, do not do the following:
    · Try rebooting after it goes black
    · Call/message/text/whatever Tesla for assistance
    Leave it as is, and have it removed for repair ASAP. Also reminder preventive is the best as soon as you see signs shown or any other strange glitch you report to us.
    @TonyT from @EV-Fixme in US and @LuckyLuke in EU can help with repairs.
    Early preventive maintenance is best as the chip can be completely cloned and all settings and history is restored on the new chip and the only noticeable difference is the glitching is gone and many report the MCU is faster.

    Signs of failure:
    · Center display (MCU) is black and wont power on
    · Bluetooth connection drops
    · 3G/LTE connection lost frequently where signal should be good
    · Maps drawing slow
    · Nav warning of no traffic data, when you can see your connected to internet
    · MCU unresponsive
    · MCU reboot randomly
    · Stuttering streaming music (cached on eMMC)
    · Stuttering AM/FM radio
    · Age, the eMMC has a finite amounts of writes available (3000 cycles)
    · MCU needs reboot daily to function without crashing
    · Radio pausing every few seconds
    · Voice command failing to work
    · Browser not working
    · Bluetooth and wifi not working together

    First thing to do, before anything else, if your seeing signs of failure, remove USB stick you may have for music or video storage. I've read reports of people not being able to boot up properly with USB stick in.

    Most of these things are good to do if your seeing signs so you don't get stuck with open roof, car that cant charge, or car that cant drive.
    Preparation for repair:
    · Stop using the sunroof
    · Remove PIN2Drive
    · Remove charging schedules
    · Set IC (instrument cluster) screen to comfortable brightness for night a daytime use.
    · Set headlights on auto
    · Charge your car up to 80-90%
    · Test you can charge and SuperCharge before shipping your eMMC in the mail. (We have seen a couple cars that can only charge to 21% battery then stop charging.)
    · Remove Charging limits
    · If you have any issues, contact us before send a Tegra.

    Removal Process:
    · Preventive eMMC replacement on MCU1 Has video with good information how to remove MCU from dash, special note about the ic screws
    o Most of the screws on the dash are T20, the 4 securing the MCU are T25
    · Replacing instrument cluster This ic removal thread helps you safely open dash to access MCU minimizing chance of aluminum trim damage.
    · Opening the MCU (video is about LTE upgrade but Tegra is right next to it)
    · Special tools you may need:
    o Micro Torx set with sizes t6-9 (most likely used in the mcu)
    o Inflating air tool to prevent dash damage https://www.lowes.com/pd/Calculated-Industries-Inflatable-Leveling-Tool-1-5-in-Pocket-Level/1000236865?cm_mmc=shp-_-c-_-prd-_-tol-_-google-_-lia-_-216-_-levelsandsquares-_-1000236865-_-0&store_code=2605&placeholder=null&gclid=Cj0KCQiA7OnxBRCNARIsAIW53B-zJiRYwjilu8Elm6c1XOUnkfGMoagIMIk3ltIGBq75hD5YQP5CgZQaAi2tEALw_wcB&gclsrc=aw.ds
    · Cover the aluminum dash trim with masking tape.
    · Fold a towel to and place over the vent behind the aluminum to help prevent scratching the dash aluminum
    · Completed LED Headlight Retrofit & My P85 Build Thread Great trim removal details!
    · Another video to come soon!
    · Roll down your windows! If you remove all power you won't be able to get into the car from the outside easily. Just in case you accidentally close a door. Also prevents glass and trim damage if someone opens door while battery is removed.
    · Have a 12v battery tender on hand as it might be a few days while the eMMC cards get shipped around (connect this to charge the battery while you work on removing the MCU, 2 post behind the nose cone of the car. Look for the red and black, Tesla moved things around at least once so verify color
    · Don't work on any electronics on carpet or anything that can make static. ESD mat for grounding is recommended
    · Have anti-static bags to ship the Tegra chip with (We received one without a anti-static bag and nothing was recoverable, not sure if related, but don't risk it)
    · Fuse removal to turn off mcu, only 1 fuse is removed from below options depending on when you car was built
    o Remove fuse 51 for classic cars prefaceliftfuse.jpg By wipers, need to remove cover in frunk
    o If not found above remove fuse F235 faceliftfuse.jpg Next to kick panel on right side, need to remove door sill plate.
    · Contact me for additional documentation for removal if needed
    · Remove 6 T20 screws to remove aluminum trim around MCU
    · Remove 12 T25 screws to remove the LCD from frame
    o Remove the 3 connections from screen to main board (open very carefully looking inside, best to have help)
    o Big Black plug with 10 wires, press the black clip and pull the plug
    o Small ribbon cable, pull up the black connector and flip back then gently remove cable
    o Big ribbon cable, press the black tab in the middle and slide the cable out with the connector
    · Remove 4 small torx screws on the Tegra board (need micro torx from lowes or similar kit, sizes can be different so be super careful checking fit)
    · Leave heat sink on and send us the board
    · Connect ribbons back and replace screws, and put mcu back in dash. 4 screws will secure it
    · I recommend putting all the panels and dash back in. You will have to remove everything again to put tegra back in. I leave it, but do so at your own risk and don’t follow my bad example.

    While your eMMC is dead *(foot note below)
    · I don't recommend driving beyond the distance you can travel to and get back, I've seen a car that lost ability to charge to max, and actually limited to about 30% after mcu went black
    · Drive after a 30 second timeout
    · No controlling suspension height
    · No manual control of headlight lights
    · No blinker sounds
    · Steering mode defaults to some setting (e.g. if I have it set to sport, during reboot of MCU is changes to standard or comfort, not sure but I can feel the steering wheel take less effort to turn than my normal sport mode)
    · No HVAC (heat, cool, vent)
    · No defrosters
    · No seat heaters
    · No steering wheel heaters
    · No radio/streaming
    · No app connectivity to control the car
    · No ability to see the car charge status from app
    · Trip A/B
    · Profiles
    · User Settings
    · Homelink
    · Bluetooth pairings
    · No rear view camera
    · Metric areas may have speed shown in MPH and not KPH so be careful
    · Do to a few strange reported charging issues, be CAREFUL driving beyond the ability to get home without charging, (range) since I have seen a car that continued to get less max available range in capacity (Still monitoring the issue)

    While your eMMC is being replaced: *(We dont not recommend driving since turn signals dont work)
    · I do not recommend traveling beyond being able to return home with the charge that is in your car, I've witnessed a car that lost additional max charge capacity after tegra was removed. This has only happened 1 time.
    · Turn signals do NOT light up at front or rear of the car. IF YOU CHOOSE TO DRIVE PLEASE USE HAND SIGNALS FOR YOU AREA since that should be the proper procedure for failed turn signal while driving a car
    · No Turn signal sounds.
    · Once MCU is reinstalled without tegra, you will be able to start your car
    · Drive after a 30 second timeout
    · Roll down windows
    · Lock and unlock doors, frunk, and trunk via keyfob
    · SuperCharge if you have free SuperCharge (IC wont show rate, but range will increase quickly)
    · Chademo charge, IC wont show rate and station will show 100% full but car will keep charging.
    · AC charge at very slow rate of 2kWH
    · Metric areas may have speed shown in MPH and not KPH so be careful
    · 12 V socket does not have power
    · USB ports do not have power

    If your eMMC is corrupt and fails to be recovered, you may lose the following permanently, with most features working again after owner sets once repaired, or wait too long and there is too much corruption:
    · No app connectivity to control the car (this may be permanent)
    · Trip A/B history
    · Profiles previously stored
    · User Settings previously stored
    · Homelink previously stored
    · Bluetooth pairings previously stored

    When reassembling the ribbon cables are hard to tell if they are connected solidly. If your screen does not light up, you can check that cable as the mcu will boot, but the screen will not display if it is a little loose. Don't ask me why I know that ;)

    Threads with lots of info:
    Preventive eMMC replacement on MCU1
    Preventative eMMC Repair - options
    Likely MCU Failure (MCU1 eMMC)
    It's too late, my MCU1 Died....
    21% SOC - Charging complete - Limited - After MCU died
    Successful data recovery of broken eMMC chip MCU1 The hardest most expensive recovery (this is why you dont want to wait)

    PM first couple people (but not wiki, we don't think wiki assist's with this) in the thread if you need more info about the tools needed, I don't think I'm allowed to post links to products.

    Replacement part numbers

    Screws holding MCU to dash Quantity 4
    Part: BLT,PFLG,TRX,M5x25[08.8]-05
    Part Number: 1008884-00-C

    Screws holding screen to MCU Quantity 12
    Part: SCR,M5X6.PH.TRX25.SST.W/PATCH
    Part number: 1010058-00-A

    * We are still collecting data on car usage without functional mcu (both blackened/tegra removed.) We will continue to collect and post information here so people have a central location for the info. AFAIK Service Centers have told people to continue driving their car to the SC when requesting blacked mcu repair. Do to that fact, and us knowing the car will allow you to drive we have collected this information. We do not endorse driving with the mcu black, one should do so at their own risk. Vehicle driving is dangerous at all times. We recommend driving safely at all times regardless the MCU is functional or not.
     
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  2. TonyT

    TonyT Member

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    #2 TonyT, Jan 8, 2020
    Last edited: Jan 8, 2020
    Wow, very good info thanks!! I’ve ran across so many of the issues myself and trying to help who I can now.
     
    • Informative x 1
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  3. LuckyLuke

    LuckyLuke Model S P90DL

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    Thanks, nice to see all this in one post/thread. :)
    I have had this issue myself in early 2019. Helping others where I can since.
     
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  4. rooter

    rooter Member

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    Terga: First metasomal tergum with long, minutely-branched setae concentrated near base, remainder of terga with scattered short setae on dorsal surface and long setae laterally, except fifth metasomal tergum completely covered by long setae; sternal setae long and distinctly branched, branches becoming shorter on more distal sterna; edges and gradular bases of sterna with medially-interrupted bands.

    Tegra: A system on a chip (SoC) series developed by Nvidia for mobile devices such as smartphones, personal digital assistants, and mobile Internet devices.The Tegra integrates an ARM architecture central processing unit (CPU), graphics processing unit (GPU), northbridge, southbridge, and memory controller onto one package.
     
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  5. EV-Fixme

    EV-Fixme Vendor

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    Yeah I fixed before, and that post got locked... no more enegry... Lost some good updates I had.. :(
     
  6. brkaus

    brkaus Well-Known Member

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    Will Tesla service try to reinstall the firmware/certificates (possibly for a fee) if the car is brought into the shop with a replaced chip and some story about the center screen rebooting a lot and not sure what happened :). Or will they detect the new chip and deny working on it?
     
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  7. EV-Fixme

    EV-Fixme Vendor

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    Most SC pretty much wont do this for you at all. Generally they only install it if you buy it from them. I doubt they will detect the chip.

    I don't know they would buy your story or not, you can try for sure as you really have nothing to loose. Hopefully people get upgraded before the loose it. This condition has been really rare.
     
  8. widodh

    widodh Model S 85 and 100D

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    I tried multiple times. They don’t do this.
     
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  9. StarLog

    StarLog Supporting Member

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    Tony has problem for sure with Terga and Tegra,,,, Love you son !
     
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  10. EV-Fixme

    EV-Fixme Vendor

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    I can help if you need help finding tools or have questions.
     
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  11. lumoart

    lumoart Member

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    Big shout out to LuckyLuke for saving our two Model S's and replacing the eMMC on Dec 27th 2019! Great guy, very supporting and patient person. We can only recommend his services A+++++++++++++ :)
     
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  12. nomar116

    nomar116 Member

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    Having just removed my eMMC, I'll echo the tape on the aluminum trim. For some reason I thought people meant the carbon fiber / wood grain paneling but that is not really at risk. What is at risk is the thin aluminum trim, particularly that which goes along the front edge of the dashboard. Taping it will prevent you from scraping it when you pull out the MCU, among other ways you might scrape it. Ask me how I know...
     
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  13. EV-Fixme

    EV-Fixme Vendor

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    Also I use 2 airbags to lift the dash, have it high enough to clear the trim. Some mcu have a little tab on the top, you have to drop the mcu down a little and tilt it. Video coming :)
     
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  14. Shadious

    Shadious Member

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    Nice work @Wiki this is very helpful for those going through the process and wondering how to proceed. I’ll be the first to admit it was very erve racking to do this removal, but there is so much good information on these threads. It made the job much easier. I’m also happy to help those who are going g through the process. Shared information and support is what this forum is all about!!!
     
  15. StarLog

    StarLog Supporting Member

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    #15 StarLog, Jan 13, 2020
    Last edited: Jan 13, 2020
    For those in the Central Florida area, or willing to drive here, I am willing to remove and install the Tegra board for you to send to EV-FixME.
    HE has approved my work.
     
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  16. rsg123

    rsg123 Member

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    2 questions:
    -I have stuttering music but only when Spotify loses connectivity. When this happens all audio doesn’t work for a minute, including turn signal audio. Is this a symptom of eMMC failure?
    -I have disabled scheduled charging as advised. Should I also disable location based mirror folding in case the eMMC completely fails?
     
  17. Shadious

    Shadious Member

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    What year is your vehicle and how many miles? Mine lasted about 5 years and about 87k. I only had the screen blacking out after driving, no other symptoms. It happened 4 times then shut off for good. Seems like everyone has a little different experience. One thing- it WILL wear out at some point- planning ahead helps!
     
  18. Cavell219

    Cavell219 Member

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    Mine also just died. December 2015 build with 82k miles. Just sent the emmc off to Tony yesterday. Luckily I'm going on vacation, good timing besides the cold, because mine does not charge at all without the emmc board installed. Just says charge complete no matter what :(
     
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  19. MikeBur

    MikeBur ManualPilot

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    Would like to confirm before adding to wiki. Any one else notice this?

    During last failure, in addition to hvac, etc not working I was in a near collision and no warning occurred. I would have expected AEB to kick in. One of my own lapses of concentration on familiar road at 55 mph. I would almost guarantee that I would have been “shouted at” by the car any other time in this situation, scared the bejesus out of me.

    I had an animated conversation with SC staff as the car is less safe to drive imo, and I only drove it to SC as the roadside rescue considers the car driveable.

    AP1 p85d

    Be careful if you’re without mcu...
     
    • Informative x 3
  20. EV-Fixme

    EV-Fixme Vendor

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    Hi Mike, Thanks for the data point and we are glad you are safe. Can you confirm your report would be the following:

    AP1 car looses AEB when mcu fails.

    I'm tryng to gather the facts from your experience and made a few assumptions:
    1 your mcu has failed (black screen)
    2 your mcu is presently in your car
    3 you were so close to a car that AEB would have kicked in under normal circumstances while driving 55 mph.

    Hopefully SC can get you repaired quickly, if not we may be able to help you drive with restored MCU functionality sooner.
     
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