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Replacement MCU1

Discussion in 'Model S: User Interface' started by bhansen34, Feb 20, 2021.

  1. bhansen34

    bhansen34 Member

    Joined:
    Nov 22, 2017
    Messages:
    13
    Location:
    baton rouge la.
    2017 S100d FSD. Under Warranty. I went in for the eMMC replacement and due to chronic WiFi connectivity issues am having a replacement MCU1 installed. Part says MCU NA PREMIUM-Hardware 2.0/2.5/3.0 -Remanufactured
    Has anyone had this done? Can i expect any improvement in overall MCU1 function?
     
  2. Krash

    Krash Data Technician

    Joined:
    Apr 18, 2017
    Messages:
    1,811
    Location:
    Intermountain US
    #2 Krash, Feb 20, 2021
    Last edited: Feb 20, 2021
    Consolidated eMMC Thread (MCU repair) (Black Center Screen)

    Congratulations. If only it were so easy for the rest of us to get replacements.

    If you post the part number, others will verify that you got the 64GB part, which should make almost everything work well. Most of the debate being what “well” means for the browser.
     
  3. bhansen34

    bhansen34 Member

    Joined:
    Nov 22, 2017
    Messages:
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    Location:
    baton rouge la.
     
  4. bhansen34

    bhansen34 Member

    Joined:
    Nov 22, 2017
    Messages:
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    Location:
    baton rouge la.
    My replacement MCU part # is 1098010-90-B
    Thanks.!
     
  5. tbone586

    tbone586 Member

    Joined:
    Jan 12, 2016
    Messages:
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    Location:
    North Florida, USA
    Question: Does anyone know where GPS functions reside? Is there a GPS board/chips/antenna built into MCU1, or are those external components?

    I ask because Tesla Service recently replaced my MCU1 with a "new" (reconditioned) MCU1. Since then, I have a new issue... my GPS guidance is totally wacked out. Shows me skating over waterways, fields and wrong roads while I'm simply driving straight down the highway. Service already has me booked for a follow-up appointment and I'm sure they'll get to the bottom of it. But my first guess is that the replacement part (yes, mine also is # 1098010-90-B) contains faulty GPS components.

    Thoughts?
     
  6. bhansen34

    bhansen34 Member

    Joined:
    Nov 22, 2017
    Messages:
    13
    Location:
    baton rouge la.
    Well that is sure depressing to hear.!
    I got my car back today after 10 calendar days with the reconditioned MCU1 and 64gb eMMC chip.
    I think they decided to replace the MCU1 because they duplicated the intermittent WiFi connectivity I have chronically had and could not fix it any other way. So, I get home and guess what. Cannot connect to WiFi even though car is 6 ft. from Extender and iPhone in car picks up network with 30mbps download.Read on teslaTap to do scroll wheel reset and, cross my fingers, it appears to be working for now.!!!
     
  7. tbone586

    tbone586 Member

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    Jan 12, 2016
    Messages:
    69
    Location:
    North Florida, USA
    Hope that stays fixed for you! Keep us posted.

    I wonder if Service is moving from replacing daughter boards to just swapping out entire reconned MCU's. Would save them time in the service bay since they avoid having to open the removed MCU on site, have someone mess with the insides, swap out the board, avoid damaging the internal cables and other components, etc. They can then send in the original MCU1's and have the interior work done off site in a more controlled fashion. This is all just speculation on my part.

    Bottom line: I just want it to work!
     
  8. tbone586

    tbone586 Member

    Joined:
    Jan 12, 2016
    Messages:
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    Location:
    North Florida, USA
    Here's an update... Service says they fixed my GPS problem:

    "Found replacement MCU is incorrectly equipped and missing gyro board. installed gyro board..."

    Can someone tell me where the "gyro board" lives (inside the MCU perhaps?) and what is the part number for such?
    If this is an item that's integral to an MCU1, and Tesla installed a "reconditioned" MCU that was missing this vital component, it doesn't say much for their quality control, does it?
     

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