ROM / Firmware/ Brick Recovery for 7" Android Head Unit AC8227l YT9217 YT9218 1/16GB

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Murat10

New member
Nov 16, 2022
3
0
Belirtilen tüm adımları yaptınız, yani bir yedekleme dökümü yaptınız mı?
Sisteminizin ekran görüntüleri var mı?
Merhaba, maalesef yedekleme yapmadım. Şu anda herhangi bir yedeğim yok. Orijinal yazılımı tamamen geri yüklemek istiyorum. Bulduğum yazılımda sp flastool ile kurulum yapmaya çalıştığımda sürekli olarak 4032 ve 5054 hatası alıyorum. Buradaki adımları eksiksiz uyguluyorum fakat sonuç aynı. test noktalarını kullandığımda bilgisayarım cihazı tanıyor. ama kırmızı çizgiyi sp flastool'a yükledikten sonra hep aynı hataları alıyorum. bana yardımcı olursanız sevinirim Cihazımın resimlerini ekliyorum. Yardımlarınız için şimdiden çok teşekkürler.
 

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Emilson

Senior Member
Jun 6, 2012
156
44
POLAND
Try again to flash the firmware whatever you want using SpFlashTool-5-2112 version wich works best for most users with these units.

Usb drivers You can find inside: ExtremeMOD - Drivers Package

Lastest software from xyauto:
9216BJ_9216CJ 10.0 XYAUTO_7.3.7
SpFlashTool packege is named ''(电脑包)9216CJ_BJ_hw_8239ok-v7.3.7.zip" Just remove chinese letters after download to avoid errors.
Login:xyauto
Pass:123456

To make a normal system upgrade in spflashtool, you can do it via 'download only' mode.
If you still have any problems, do a clean flash via 'Format all + download' mode. It wiping whole memory and reload new partitions and system.
Use scatter file included in package.
In this mode all files from file list must be selected.
Package from the link is missing the 'preloader' and 'metazone' file, because you should use your own files from backup.
Since you don't have it i'll give you my own files, in the attachment.

After that the system should be working, you may just have to reconfigure the touch screen or buttons in car settings -> factory setting(password:8888)

Good luck
 

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Last edited:

Murat10

New member
Nov 16, 2022
3
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Arkadaşım merhaba. Tüm yardımlarınız için çok teşekkür ederim. Yaklaşık iki haftadır cihazımı tekrar açmaya çalışıyorum. yardımınız gerçekten cihazımı kurtardı. Tekrar teşekkürler. kendine dikkat et.

Topluluk tarafından Doğrulandı simgesi
 

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antonkwok

Member
Sep 15, 2022
6
0
Hi...I need help! My device stuck on the android logo, the seller sent me a firmware to update via flash drive, but the device does not read the pendrive, the pendrive light blinks a few times and stops at the logo. I think it would only work through "test point". Does anyone know where the "test point" of this board is? Photos follow...
where tespoin in the board please
 

ericgonzalez

Member
Nov 6, 2022
16
0
No se cuales son los puntos de prueba, la pc no reconoce el dispositivo cuando lo conecto al puerto USB, la radio esta pegada en una pantalla negra que enciende pero no se ve nada, me pueden ayudar?
Tengo los drivers y flashtool.
RADIO modelo: F9212A
 

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Emilson

Senior Member
Jun 6, 2012
156
44
POLAND
what operating system you had, was it 8.1/9.1/10.0? Any screenshoots?

Here's lastest firmware for your unit: F9212-YT9212A-10.0-1024x600-XAUTO_7.3.7_1.3
Login:xyauto
Pass:123456
Use '(电脑包)9212A_hwok_13_v7.3.7.zip' file, remove chinese letters after download to avoid errors.
Use SpFlashTool 5.2112 version.


if the radio turns on the screen, probably the preloader is still ok so you don't have to use the testpionts.
if pc doesn't recognize device just check the usb cable, try to use a different one, maybe this one is damged. I had a case like this with mine.
Btw. for flashing firmware you should connect usb cable only to a 4 pin plug.

I marked you a testpoint from the picture,
You have a different type motherboard layout than mine, so I'm not sure if that's it.
 

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ericgonzalez

Member
Nov 6, 2022
16
0
Thank you
I had android 9. 1 I updated to android 10.0 and apparently it updated badly and now I can't use the screen, the test point thing, how do you make it work, press the colon and connect the Usb to the PC?
what operating system you had, was it 8.1/9.1/10.0? Any screenshoots?

Here's lastest firmware for your unit: F9212-YT9212A-10.0-1024x600-XAUTO_7.3.7_1.3
Login:xyauto
Pass:123456
Use '(电脑包)9212A_hwok_13_v7.3.7.zip' file, remove chinese letters after download to avoid errors.
Use SpFlashTool 5.2112 version.


if the radio turns on the screen, probably the preloader is still ok so you don't have to use the testpionts.
if pc doesn't recognize device just check the usb cable, try to use a different one, maybe this one is damged. I had a case like this with mine.
Btw. for flashing firmware you should connect usb cable only to a 4 pin plug.

I marked you a testpoint from the picture,
You have a different type motherboard layout than mine, so I'm not sure if that's it.
View attachment 5765937
Thank you
I had android 9. 1 I updated to android 10.0 and apparently it updated badly and now I can't use the screen, the test point thing, how do you make it work, press the colon and connect the Usb to the PC?
 

Emilson

Senior Member
Jun 6, 2012
156
44
POLAND
Thank you
I had android 9. 1 I updated to android 10.0 and apparently it updated badly and now I can't use the screen, the test point thing, how do you make it work, press the colon and connect the Usb to the PC?
Again like I said above, if the screen still lights up, the unit should be detected using first option: by connecting usb and then 12v, pc should detect the unit and the process should start.

if the pc doesn't detect the unit at all (and even the unit shows no signs of life at all), then you should try the testpoint method.
Then you should connect two testpoints together, then connect usb and then 12v.

Use scatter file from package, and flash firmware in 'download only' mode as it is.
If any errors, use 'format all+download' but then all files in spflashtool file list must be selected, so you need to add files to empty places like 'preloader and 'metazone'.
 
Last edited:

Hashemzaid

Member
Nov 17, 2022
10
0
Try again to flash the firmware whatever you want using SpFlashTool-5-2112 version wich works best for most users with these units.

Or here's the link to the lastest software from xyauto:
9216BJ_9216CJ 10.0 XYAUTO_7.3.7_1.2
SpFlashTool packege is named '(电脑包)公版海外9216CJ_hw_12ok-v7.3.7.zip'. Just remove chinese letters after download to avoid errors.
Login:xyauto
Pass:123456

To make a normal system upgrade in spflashtool, you can do it via 'download' mode.
If you still have any problems, do a clean flash, wiping whole memory, partitions and reload new system via 'Format all + download' mode.
Use scatter file included in package, all files from file list must be selected in this mode.
Package from the link is missing the 'preloader' and 'metazone' file, because you should use your own files from backup.
Since you don't have it i'll give you my own files, in the attachment.

After that the system should be working, you may just have to reconfigure the touch screen or buttons in car settings -> factory setting(password:8888)

Good luck
Thanks very much for your explanation...
I've been looking for days for the correct procedure to installation new firmware for my android head unit...
RESTART LOOP:
1- I did reset the unit from android menu because sometimes stuck on restart loop until I pull the fuse and return it back after a minute.
2- after the reset the unit stuck on restart loop what ever I did.
3-i tried to update using USB but it didn't work.

I NEED YOUR HELP TO CORRECT ME HERE :
1. I want to make sure this firmware from xyauto is the correct for me :
(电脑包)公版海外9216CJ_hw_12ok-v7.3.7.zip ?

2.after loading scatter file on sp tool :
Shoud I do "Download only " with preloaded checked or not checked OR "format all+ download" with all selected and coping (preloader &metazone) you have given in the same file of firmware?

3.i don't have 12v adapter,and I'm willing to flash while head unit is connected to car power ,is that ok?

Thanks for cooperation in advance your efforts are highly appreciated.
 

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Emilson

Senior Member
Jun 6, 2012
156
44
POLAND
Thanks very much for your explanation...
I've been looking for days for the correct procedure to installation new firmware for my android head unit...
RESTART LOOP:
1- I did reset the unit from android menu because sometimes stuck on restart loop until I pull the fuse and return it back after a minute.
2- after the reset the unit stuck on restart loop what ever I did.
3-i tried to update using USB but it didn't work.

I NEED YOUR HELP TO CORRECT ME HERE :
1. I want to make sure this firmware from xyauto is the correct for me :
(电脑包)公版海外9216CJ_hw_12ok-v7.3.7.zip ?

2.after loading scatter file on sp tool :
Shoud I do "Download only " with preloaded checked or not checked OR "format all+ download" with all selected and coping (preloader &metazone) you have given in the same file of firmware?

3.i don't have 12v adapter,and I'm willing to flash while head unit is connected to car power ,is that ok?

Thanks for cooperation in advance your efforts are highly appreciated.
-' (电脑包)9216CJ_BJ_hw_8239ok-v7.3.7.zip' just remove chinese letter to avoid any errors.

-usualy you can use 'download only' with that package as it is, without 'preloader' and 'metazone' when you are flashing similar firmware.
But if firmware is different, bigger system partition size etc, then you can get error 'PMT changed for the rom' and the process will be cancelled, nothing happens.

Then you have to select 'format all+download' with all files, including 'preloader' and 'metazone' added.
Probably you'll have to choose it anyway.

Sure you can do it in your car, just make sure that unit is properly wired, so it dont have a any power supply when ignition is off, because the process begins just after first access to the power.

Btw. I hope you already have the usb drivers installed
 
Last edited:

ericgonzalez

Member
Nov 6, 2022
16
0
Again like I said above, if the screen still lights up, the unit should be detected using first option: by connecting usb and then 12v, pc should detect the unit and the process should start.

if the pc doesn't detect the unit at all (and even the unit shows no signs of life at all), then you should try the testpoint method.
Then you should connect two testpoints together, then connect usb and then 12v.

Use scatter file from package, and flash firmware in 'download only' mode as it is.
If any errors, use 'format all+download' but then all files in spflashtool file list must be selected, so you need to add files to empty places like 'preloader and 'metazone'.
If I understand my friend, what I am not clear about is how to do the test points since I have never done it, that is my question as it is done
 

Hashemzaid

Member
Nov 17, 2022
10
0
Try again to flash the firmware whatever you want using SpFlashTool-5-2112 version wich works best for most users with these units.

Or here's the link to the lastest software from xyauto:
9216BJ_9216CJ 10.0 XYAUTO_7.3.7_1.2
SpFlashTool packege is named '(电脑包)公版海外9216CJ_hw_12ok-v7.3.7.zip'. Just remove chinese letters after download to avoid errors.
Login:xyauto
Pass:123456

To make a normal system upgrade in spflashtool, you can do it via 'download' mode.
If you still have any problems, do a clean flash, wiping whole memory, partitions and reload new system via 'Format all + download' mode.
Use scatter file included in package, all files from file list must be selected in this mode.
Package from the link is missing the 'preloader' and 'metazone' file, because you should use your own files from backup.
Since you don't have it i'll give you my own files, in the attachment.

After that the system should be working, you may just have to reconfigure the touch screen or buttons in car settings -> factory setting(password:8888)

Good luck
Thanks very much for your explanation...
I've been looking for days for the correct procedure to installation new firmware for my android head unit...
RESTART LOOP:
1- I did reset the unit from android menu because sometimes stuck on restart loop until I pull the fuse and return it back after a minute.
2- after the reset the unit stuck on restart loop what ever I did.
3-i tried to update using USB but it didn't work.

I NEED YOUR HELP TO CORRECT ME HERE :
1. I want to make sure this firmware from xyauto is the correct for me :
(电脑包)公版海外9216CJ_hw_12ok-v7.3.7.zip ?

2.after loading scatter file on sp tool :
Shoud I do "Download only " with preloaded checked or not checked OR "format all+ download" with all selected and coping (preloader &metazone) you have given in the same file of firmware?

3.i don't have 12v adapter,and I'm willing to flash while head unit is connected to car power ,is that ok?

Thanks for cooperation in advance your efforts are highly appreciated
-(电脑包)公版海外9216CJ_hw_12ok-v7.3.7.zip - just remove chinese letter to avoid any errors.

-usualy you can use just 'download only' if you are re-flashing similar firmware.
But if firmware is different, bigger system partition size etc, then you can get error 'PMT changed for the rom' and the process will be cancelled.

Then you have to select 'format all+download' with 'preloader' and 'metazone' files added.
Or you could choose it right away.

Sure you can do it in your car, just make sure that unit is properly wired, so it dont have a any power supply when ignition is off, because the process begins just after first access to the power.

I hope you already have the usb drivers installed

Thanks very much for your quick response, I really appreciate it too much..

1-For " download only " do I have to check or uncheck preloader?
I already got Mtk driver from your above post.
2- fisrt I should press download after attaching scatter file then connect usb cable to the unit WHILE MAKING SURE THAT UNIT IS SWITCHED OFF AND NOT GETTING POWER RIGHT ???
THEN after loading flash to the unit is completed and "ok" message appeared I disconnect usb then connect power supply to the unit , Am I right here ?

Thanks bro for your help ,I really appreciate it.
 
Last edited:

Emilson

Senior Member
Jun 6, 2012
156
44
POLAND
Thanks very much for your explanation...
I've been looking for days for the correct procedure to installation new firmware for my android head unit...
RESTART LOOP:
1- I did reset the unit from android menu because sometimes stuck on restart loop until I pull the fuse and return it back after a minute.
2- after the reset the unit stuck on restart loop what ever I did.
3-i tried to update using USB but it didn't work.

I NEED YOUR HELP TO CORRECT ME HERE :
1. I want to make sure this firmware from xyauto is the correct for me :
(电脑包)公版海外9216CJ_hw_12ok-v7.3.7.zip ?

2.after loading scatter file on sp tool :
Shoud I do "Download only " with preloaded checked or not checked OR "format all+ download" with all selected and coping (preloader &metazone) you have given in the same file of firmware?

3.i don't have 12v adapter,and I'm willing to flash while head unit is connected to car power ,is that ok?

Thanks for cooperation in advance your efforts are highly appreciated


Thanks very much for your quick response, I really appreciate it too much..

1-For " download only " do I have to check or uncheck preloader?
I already got Mtk driver from your above post.
2- fisrt I should press download after attaching scatter file then connect usb cable to the unit WHILE MAKING SURE THAT UNIT IS SWITCHED OFF AND NOT GETTING POWER RIGHT ???
THEN after loading flash to the unit is completed and "ok" message appeared I disconnect usb then connect power supply to the unit , Am I right here ?

Thanks bro for your help ,I really appreciate it.

Yeah You are right with everything
EDIT: press 'download' but then after connecting usb cable you have to turn power on too
And when flash is completed with "ok" you have to disconnect usb cable and turn power off.
and power it on againg to check if everything works
I'm just making sure we understand each other😁

Just leave 'preloader' 'metazone' unchecked in 'download only' mode.
 
Last edited:

Hashemzaid

Member
Nov 17, 2022
10
0

Yeah You are right with everything
EDIT: press 'download' but then after connecting usb cable you have to turn power on too
And when flash is completed with "ok" you have to disconnect usb cable and turn power off.
and power it on againg to check if everything works
I'm just making sure we understand each other😁

Just leave 'preloader' 'metazone' unchecked in 'download only' mode.
Yes sure , I understand you very well.
Thank you very much bro .
Thanks a lot for your time.
 

ericgonzalez

Member
Nov 6, 2022
16
0
If I understand my friend, what I am not clear about is how to do the test points since I have never done it, that is my question as it is done
 

Hashemzaid

Member
Nov 17, 2022
10
0

Yeah You are right with everything
EDIT: press 'download' but then after connecting usb cable you have to turn power on too
And when flash is completed with "ok" you have to disconnect usb cable and turn power off.
and power it on againg to check if everything works
I'm just making sure we understand each other😁

Just leave 'preloader' 'metazone' unchecked in 'download only' mode.
Bro ,

Now I did download only and flash done the new firmware but with the new firmware still stuck on restart loop..

I tried " format all and download "

But giving me this message .

I did copied preloader and metazone you have given above to the firmware folder.
 

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  • 2
    Same, I used supermod8 package to get twrp recovery and magisk root, just by flashing magisk.zip package thru Twrp recovery.

    But after rooting the system took much longer to load, not sure why and i had couple other issues after.

    Anyway, twrp recovery has built-in 'File manager' so you can explore and modify whole system files without root.
    So im not using magisk root anymore, just deleted apps that i didnt need thru twrp 'file manager'.

    Ps.
    Lastest addon from xyauto, adds 21 themes to choose from.
    upload via usb by 'android upgrade' thru car settings.
    Ui_1024X600_1280X720_21sets
    UI.png
    1
    I used twrp from the zip/rar extremeMod android 8 package. It's on the first page. I think there's also instructions for rooting via magisk manager. The files kill_gapps.zip and the app L_Speed.apk are on the 4PDA website. There's a lot of useful stuff there. The site is in Russian, use a translator. You must be registered to download the app, firmware, etc.
    1
    I were not able to use supermod8, as i already posted in that thread i get a bootloop right after installing the rom on first boot
    i think is just a waste of time trying to get supermod8 working.

    I didn't mention it earlier, but I believe that it's worth to flash your own backuped metazone.bin when flashing different firmware, because I think that metazone contains a lot of settings dedicated to a given motherboard like buttons, touch, screen etc.

    If You are looking foor 'speed' i remember that ExtremeMod said that stock android 6.0 runs fastest.
    But it requires downgrading preloader.
    Of course old Os comes with outdated can data base, oldest apps etc.

    Heres package of fake8.1 wich is android 6.0, with preloader included 8.1Go_1024X600

    Personally, I prefer to use the latest releases.
    1
    I don't know about that speed. Android8 is better for me. The first start after rooting was longer, subsequent starts are fast, I keep noticing that I don't have google services. I don't have any problems with android8, only one when it sometimes restarts while running,it did the same randomly on android6 . I don't know why it sometimes restarts, it does it randomly, but in any case, removing all google services from the system and installing L_Speed.apk are the cure for my small 1gb ram. I can see it when I start Sygic, for example. It's faster than on android 6, but I also had google services there, so maybe it's that.
    1
    Thank you for your reply, i will check the root procedure.

    Which TWRP you used? And im also interested in the two zips for optimizing system performance, you got any links for me?

    EDIT: Rooting does not work, i did it like you described (Preserve AVB 2.0/dm-verity and Patch vbmeta in boot image were not picked in the options), after flashing the new boot.img magisk itselfs says installed 25.2 and an app like link2sd or mixplorer accesses root but when i try to delete an app or rename a system file it says no file deleted, no file renamed.

    When open Magisk it says "Abnormal State A "su" binary not form Magisk has been detected. Please remove any competing root solution and/or reinstall Magisk"
    If you flashed twrp, try using twrp and delete what you don't need. As Emilson wrote..

    I had the same error on magisk. I downloaded an older version called Magisk Manager, made root, and then updated magisk. If you have a root file browser, after opening magisk for the first time, it asks if you have granted root rights for the root browser, or download another app to manage root rights and remove magisk. e.g. SuperSU
  • 39
    ROM / Firmware/ Brick Recovery for 7" Android Head Unit AC8227l YT9217 YT9218 1/16GB

    Thanks everyone who contributed in my effort to fix my bricked device. Here is all that I have found useful in successfully reviving my device.
    The files shared here are the ones that worked on my unit (see specs and pictures below) If your device is different, it may or may not work.
    If the device has dedicated radio chip inside, the Firmware number will show as YT9218, if no radio chip, then it will show as YT9217
    Note: if your device is not bricked, Make a full backup before trying another firmware.

    I hope it helps.
    (donations are always welcome ) :D

    Memory dump:
    firmware 20181222 HiFi: (Link) (thanks mazepa2000) (May 2019 update below)
    Rooted TWRP firmware 20190523 HiFi: (Link)

    Preloader (Boot_1) from other Similar Firmwares: (Link) <- Click again if it doesn't lead to the relevant post.
    Download the one similar to your device's version.

    Firmware via flash tool: Rooted TWRP 20190523 (Link) Thanks Maxkir
    (You may need to remap side touch buttons in Factory settings (code 8888) -> Touch settings -> Click start -> Name of the button -> The button itself ->Repeat for all the buttons -> close -> ok).

    Firmware for YT9213 Device: (Link) (Thanks pajurpl)

    Update / Upgrade Files USB flash drive:
    Firmware 20190522 HiFi:
    (Link) (Thanks foxgiggle , iSevenAuto)
    Firmware 20190906: (Link)

    MCU 3.1 (Link)(Thanks foxgiggle )
    MCU 2.8 (Link) (Thanks lemmon and foxgiggle)

    I hope it helps. (donations are always welcome ) :D

    Memory Dump Procedure via flashtool:
    (Memory dump is only needed if you need full recovery from a backup. Otherwise you may only need to do the next part.)
    Download and install MTK drivers. (Link)
    Load scatter file and preloader (Link) in spflashtool. Press Ctrl Alt V , then go to Window and select "write memory". In file path select "user", in begin address put 0x0, In Region select the partition named "EMMC_USER". Hit Write memory. After that plug in the usb cable (connected to usb1 port). If the device is not detected, you need to power it on. If still not detected then you might need to short the two test points (see picture) (without power this time) and then plug in the usb cable. Remove the short when write process starts. Check if the issue is fixed. If its not fixed, then do the same to write boot2 and boot1 partitions as well. You may need to download Boot_1 specific to your original firmware from the link above.

    Uploading Firmware (full or parts) via flashtool:
    If you are uploading the firmware available in parts, you only need to upload "BOOTIMG" and "ANDROID" (SYSTEM).
    You may also need to flash "RECOVERY". Remember to uncheck the preloader. Here is a nice instructions file. (Link) (thanks Maxkir)
    There is more info and firmwares to chose from at 4pda forum.

    Update / Upgrade Procedure via USB flash drive:
    Copy the zip file (do not extract) to usb drive or microSD card, (formatted by SD Card Formatter). Connect to usb port 1 or 2. Go to Car Settings, System info. Click Android Upgrade.
    --OR--
    Extract the zip into a folder named XYAUTOUPG into the flash drive or microSD card, connect to usb port 1 or 2 and then reboot. Upgrade should start automatically. You might need to try with different USB drives or sd cards. For some reason this only works with certain usb and cards.

    I hope it helps. (donations are always welcome ) :D

    MCU Upgrade Procedure via USB flash drive:
    Extract the mcu file into flash drive or microSD card. Connect to usb port 1 or 2. Go into system info and update mcu.

    Make a Full Backup/Memory Dump:
    Open SPFlashtool, Select Memory Test Tab, Select only RAM Test (uncheck the rest), push start, and connect the unit. Save the information appeared, in a text file for later. (Read above "Memory dump procedure" for the usb connection setup).
    Now go to ReadBack Tab, Double click on empty space next to tick mark, Select a folder where you want to store the dump file, and Type a name for the dump file you are going to creat, (ie. Boot_1, Boot_2, USER). Click Save. In next window "Readback block start address", select the region you want to make backup of (ie. EMMC_BOOT_1, EMMC_BOOT_2, EMMC_USER).
    Start address is 0x0000000000000000
    Length copy and paste from the text file you created earlier.
    typically for Boot_1 and 2 the length is 0x0000000000400000
    and for USER (16GB models) the length is 0x00000003a8000000
    Click OK.
    Now click on Readback and then connect the unit via usb cable. and Read process will start.
    Do the same to make backup of all three partions. USER will take long time because its the largest partition.


    RDS FM Radio:
    Radio app with fixed RDS, channel names on buttons and HiFi: (Link) (thanks sjguk)
    Copy to FMRadio directory /system/priv-app/FMRadio, rename to FMRadio.apk and change permission 764. (or 755 ?).

    Channel name Editor: (Link) (thanks mclaught)
    install as normal. You may need to install GalaPublicResources. Click top right dots.

    I hope it helps. (donations are always welcome ) :D

    Multi Window Mode:
    Go to root folder, look for build.prop. Open in text editor. Change the line ro.build.type=user to ro.build.type=userdebug.
    If no such line is there, then simply add the line at the end. Save and exit. Go to Android settings, Developer options, look for multi window mode and enable it. Swipe down from the top of the window, Click on recent apps tile. You'll see the new multi window option there.

    Subwoofer output Pin:
    The default AUX_out pins are for mid range audio and is controlled by Mid slider in the mixer. The subwoofer output is on another pin (See Picture).
    it is easy to remove one of the AUX_out pin and install it at the Sub output. this pin is controlled by Subw slider in the audio mixer.


    Launchers UI1, UI2, UI4, UI5 (Link) (Thanks Maxkir)

    Boot animation: (Resolution is 1024x600)
    eg. (Link)
    The animation preview didn't work for me, but I installed it anyway and it worked fine.

    OBD Dongle Bluetooth Setting:
    Open Bluetooth app, Click on settings, tap on the pin code "0000" and type in "1234" instead. Save settings.
    Now search and connect the OBD dongle normally.

    I hope it helps. (donations are always welcome ) :D

    Unit Specs:
    motherboard marking YT9217 VER1.5 XY AUTO also 9218 VER2.4 XY AUTO near the antenna
    Model no 8227L_demo android 8.1
    Android YT9217C_00005_V003_20191402_HIFI
    Kernel 3.18.22
    DDR 1GB FLASH 16GB
    CPU A7 1.3GHzx4
    Amplifier AC7315 mos bile duct 45Wx4
    AutoChip ARM AC8227L
    Mediatek MT6323LGA
    Kingston EMMC 16G
    5
    the link takes me to the main page. and then its like finding needle in a haystack.

    All relevant info about ROMs and flashing you can find in top header of this russian forum.
    Look at the spoilers in the gray header layer and use Google translate to understand what is written there.

    There are 3 ROM versions for the 8227L based head units. I downloaded and installed the oldest of the 3 (rooted and TWRP IMG included). Copy all files from the RAR to a flashdrive in root folder.
    Turn off the head unit.
    Connect the flashdrive to USB 1 slot of the head unit.
    Turn on the the head unit.
    The install process starts immediately after turning on.
    It takes about 10 minutes.
    When install process is ready, turn off the head unit.
    Detach the flashdrive.
    Turn on the head unit and it will boot with factory settings like a new device....

    Note that there are also ROMs for flashing wit MTC flash tool downloadable.
    But the versions for installing from USB sticks ( po russki - dla flashky) are more comfortable to install and I don't own a Windows pc. So this variant was my favorite method...

    Regards and good luck...

    Edit: if your unRAR program asks for a password for unpacking the RAR file, then use Eazy unRAR app from Playstore on your Android device - it ignores password lock in RAR file ;) ...

    Edit2: the 5th gray spoiler in the top header of the Russian forum hosts the links to the ROM RAR files...
    4
    Lots of info on those headunits (russian, use google translate):
    http://4pda.ru/forum/index.php?showtopic=936535

    pinout:
    4
    new firmware and MCU

    comming soon:
    16808269.png
    3
    Very nice indeed.
    Im using Agama launcher at the moment, far better than others in my opinion.
    a bit off topic...

    Updated to MCU 2.8 - automatic acc off time delay works > 24hours...
    I modded the UI2 Launcher a little bit for my personal needs.
    See attached screenshot.
    (my car, VW golf plus 2013, is now shown in Homescreen...)