MCU1 (center console) failure of Tesla Model X

2021/3/18 Postscript: Repair has been completed.Click here for the report.

As mentioned in this article, Tesla has been officially notified to NHTSA in the United States, and has started recalling the center console blackout (the screen is dark and nothing can be seen).After that, recall started in Japan without delay.

Why does this phenomenon occur?In the Tesla Model S/X, four independent computers are connected via the gateway on Ethernet.Regarding the main functions inside, the standard CAN connection is used in the car industry, but if it is necessary to send and receive a large amount of data, a wider zone is used.

The cause of this trouble is MCU.This MCU has a version of 1 and 2, and the MCU of my car, which is the subject of recall, is version 1.This MCU1 uses an 8GB memory card called EMMC for storage, but it is because the design of the software is bad and the amount of writing is too large, so the life comes.MCU has version 2, MCU2 has changed to 64GB, and the amount of writing has been reduced since Software Update 2019.32.12.7.Therefore, it is thought that similar problems will not occur in the future.

The sign of this trouble was about a week ago. Normally, when you get into the car in the morning, the MCU starts out of the sleep and the screen appears, but at that time it was displayed on the IC that "The vehicle is running. If this message disappears, please step on the brake." It is. After that, the navigation that appears on the MCU does not proceed from the display of "Initialization" (in Tesla, when you get in, the navigation to work or your home is automatically started). I intuitively felt that the life was near, but I decided to restart it and restarted it. MCUs have nothing to do with driving, so they can be restarted even while driving (although not recommended). Then the MCU will not stand up this time. Ah, I thought, I ran for about 10 minutes and restarted again. This time, it rose in about 5 minutes, and the navigation worked normally.

2021/3/5 The same phenomenon when returning home.I thought that it would be over, but I thought it would be better to have it replaced soon, and restarted.Congratulations (!?) Black out.

This will be left as a memo for those who have experienced MCU1 problems in the future.The following describes what symptoms will appear and what will not be possible if MCU1 is blacked out.If you are on a recall target, please read it.

Below, we will introduce recommended settings for those who feel the sign of MCU1 blackout.

Prepare and prepare in advance.I've been riding every day for three days since I blacked out, but if I get used to it, I think I can get on it normally.The most dangerous is the door lock and the back monitor.When you get off the car, lock with the key every time.When backing, check the back with the back mirror, and make sure you back more slowly and safely than usual.

Bonus: Select HVAC on the tab on the screen of Scan My Tesla.If you press and hold the item, you can sort, so let's sort in the order you like.