[ROM] [ROOT] [TWRP] [GUIDE] YT9216B Chinese Android Head Unit

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deltoid61

New member
Sep 12, 2022
4
0
lease help me. . Bricked my Chineese head unit with 9216Bj.
here system-info.png is version

actual-specs.png

I followed exact instructions in this guide .When i was downloading an error came that 'PMT changed for the rom, it must be downloaded'


PMT-chagnged.png
it said try'format all+download'
chip-version.png
i tried that and i think it formatted the Bootloader aswell because now i checked in options 'Format all was selceted' It flashed after that after 100% flash error came.
It started flashing but after 100% this error came
final-error.png



So the problem i think is 'bootloader' is formatted
It should have been told in this guide that we have to do a format 1st and not select the option to format 'bootloader'


now i am trying original from xyauto but nothing is working
1st i tried only 'download' but it gave error and told me select' Format all+ download' i did not select preloader. It flashed 100% than this error came at end

Even cant memeory dump. getting this error


enable-ram-error.png


I have tried every method


hardware-sticker.jpg


Now its black screen but device is detected in PC but no info is writtern on left side in Spflashtool.

final-error-Copy.png
 

riz76

Member
Sep 27, 2022
7
0
Hi Everyone

Attaching CPU and MCU details screen shot of my head unit .

Please guide me on following .

1. As this is Chinese head unit hence they have reloaded junky Android OS with lot of unnecessary service which is easting memory and decreasing the speed. kindly help how to clean the unnecessary files and stop the unused service to speedup the system.

2. Is there any option to install the clean latest android OS on this head unit ? if yes then where i have to download the latest compatible OS and what is the step by stem guide to install the same.

3. How to uninstall default Launcher and install my own . how to uninstall the preloaded apps which is not easily removable from uninstaller.

4. how to root this .. which apps will work on this mcu.
 

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Emilson

Senior Member
Jun 6, 2012
156
44
POLAND
lease help me. . Bricked my Chineese head unit with 9216Bj.
I don't know what version of flash tool are you using but i think that the correct program shouldn't let do the formatting without the complete list of files. ? e.g. without preloader file, etc.

I used flash tool version 5.2112, probably heres the same as mine: https://spflashtools.com/windows/sp-flash-tool-v5-2112
Then find some firmware for 92xx head unit with preloader, scatter file, etc ( if you dont have your backup dump) and then do the formatting once, with all the files selected/added in the the list. Later, anytime you uploading another firmware just use download mode, then you dont need to add preloader if you don't have to.

Some time ago I found two types of preloaders for 8227L/92xx, one for booting android 6.x, the other one for booting android 8.x. but I deleted everything because I stopped playing with it.

So you need to find it yourself, try to look for full package on http://file.xygala.com/ or anywhere, that will contain both preloader and scatter and other system files.

Edit: for example here is 9218C_9217C公版UI1电脑包20200513.rar some full official xyauto package with old android 6? fake 8.1 that you can use just to bring the radio back to life. later you can search for something newer.
 
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Britch3s

Senior Member
Sep 10, 2016
97
15
32
Grayson
For most who doesn't know, most these "2gb, 4gb" versions are faked. I have a "2gb" version in my E46 now. You can go-to a certain setting and switch it yourself. You can also download a proper info app and see just exactly what is your running, and how much ram it really has. Mine says it's android 10. Info app used says Android 8. But does indeed have 1gb not 2 as per my purchase claimed. The seller cash apped my money back off eBay. And silently asked me to hold my tongue upon the matter to keep the 38.00 dollar device as well.
 

Britch3s

Senior Member
Sep 10, 2016
97
15
32
Grayson
alright, ive not tried to root mine yet as most of all these features are now possible with stock rom and you can nearly uninstall everything that it doesn need already. now, with that said. i still wish to root. but first i wish to get my mph out of KMH although i have switched it, it remains showing speed as kph (even when its saying its in mph) anyone have any way to proper make the gps show correctly? i live in the USA so kph isnt really a thing here.
 

Claudio GI

Member
Nov 4, 2022
8
1
Quindi... come eseguire il root del tuo dispositivo?
vieni flashare twrp?

È possibile utilizzare questo firmware pre-rootato, con twrp incluso.
-Il tipo di build è userdebug, significa che puoi abilitare la modalità multi-finestra nelle impostazioni di sviluppo
- Basato sull'ultimo firmware disponibile
-Radice
- Casella occupata
-TWRP
-HI-FI abilitato
-UI1 accetta
-Radio FM con RDS e save manager.
-TPMS (funziona con unità usb cinesi economiche)
-DVB-T e SDR (richiesto RTL2832U)
Il suo backup del sistema che ho già modificato per me stesso.
Significa che è marchiato Ford Mustang fino in fondo.
Puoi farlo per sbarazzarti di quel marchio:
-scegli un altro bootlogo.
-flash nuova bootanimation.
-installa il launcher UI1 di serie (non modificato).

Per ottenere ADB, consiglio questa app:
Wi-Fi ADB - Debug via etere

Scarica:
YT9216B_00002_V004_20191012_HIFI_V3.zip

Password impostazioni di fabbrica: 8888

Nota importante: Android 8.1 Go è solo un trucco di marketing cinese, in realtà questa unità principale ha Android 6.0 (api lvl 23, non 27 come dovrebbe avere 8.1).
Salve
Quindi... come eseguire il root del tuo dispositivo?
vieni flashare twrp?

È possibile utilizzare questo firmware pre-rootato, con twrp incluso.
-Il tipo di build è userdebug, significa che puoi abilitare la modalità multi-finestra nelle impostazioni di sviluppo
- Basato sull'ultimo firmware disponibile
-Radice
- Casella occupata
-TWRP
-HI-FI abilitato
-UI1 avviare
-Radio FM con RDS e save manager.
-TPMS (funziona con unità usb cinesi economiche)
-DVB-T e SDR (richiesto RTL2832U)
Il suo backup del sistema che ho già modificato per me stesso.
Significa che è marchiato Ford Mustang fino in fondo.
Puoi farlo per sbarazzarti di quel marchio:
-scegli un altro bootlogo.
-flash nuova bootanimation.
-installa il launcher UI1 di serie (non modificato).

Per ottenere ADB, consiglio questa app:
Wi-Fi ADB - Debug via etere

Scarica:
YT9216B_00002_V004_20191012_HIFI_V3.zip

Password impostazioni di fabbrica: 8888

Nota importante: Android 8.1 Go è solo un trucco di marketing cinese, in realtà questa unità principale ha Android 6.0 (api lvl 23, non 27 come dovrebbe avere 8.1).
Ciao, prima di tutto grazie per i tuoi sforzi per aiutare quelli come me che sono incompetenti.
Ti chiedo come installarlo dato che ho provato con una pendrive ma non si aggiorna.
Grazie
PS. my problem is that the pc is fixed as well as the radio because it is in the car
 
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bellsie1525

Member
Nov 1, 2022
6
0
So... how to root your device?
how to flash twrp?

You can use this pre-rooted firmware, with included twrp.
-Build type is userdebug, means u can enable multi-window mode in dev settings
-Based on latest available firmware
-Root
-Busybox
-TWRP
-HIFI enabled
-UI1 Launcher
-FM Radio with RDS and save manager.
-TPMS (working with cheap chineese usb units)
-DVB-T & SDR (required RTL2832U)
Its backup of system i already have modified for myself.
It means, its branded to Ford Mustang all the way.
U can do this to get rid of that branding:
-choose another bootlogo.
-flash new bootanimation.
-install stock (not modified) UI1 launcher

To get ADB, i recommend this app:
WiFi ADB - Debug Over Air

Download:
YT9216B_00002_V004_20191012_HIFI_V3.zip

Factory settings password: 8888

Important note: Android 8.1 Go is just chineese marketing trick, in reality this head unit has android 6.0 (api lvl 23, not 27 as 8.1 should have).
 

ejrosasg

Member
Nov 23, 2022
5
2
Is there any way that I can customize the car? Like to display the default?
Im using it on my Mazda 3
 

kundanrawat882

New member
Jan 16, 2023
2
0
Yt 1692b सही काम नहीं कर रहा है मुझे संस्कार आ रहा है डाउनलोड करें
 

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  • 24
    So... how to root your device?
    how to flash twrp?

    You can use this pre-rooted firmware, with included twrp.
    -Build type is userdebug, means u can enable multi-window mode in dev settings
    -Based on latest available firmware
    -Root
    -Busybox
    -TWRP
    -HIFI enabled
    -UI1 Launcher
    -FM Radio with RDS and save manager.
    -TPMS (working with cheap chineese usb units)
    -DVB-T & SDR (required RTL2832U)
    Its backup of system i already have modified for myself.
    It means, its branded to Ford Mustang all the way.
    U can do this to get rid of that branding:
    -choose another bootlogo.
    -flash new bootanimation.
    -install stock (not modified) UI1 launcher

    To get ADB, i recommend this app:
    WiFi ADB - Debug Over Air

    Download:
    YT9216B_00002_V004_20191012_HIFI_V3.zip

    Factory settings password: 8888

    Important note: Android 8.1 Go is just chineese marketing trick, in reality this head unit has android 6.0 (api lvl 23, not 27 as 8.1 should have).
    11
    Instructions

    Prepare:
    - download and unzip archive from my first post
    - make/buy USB A male to A male cable (for photos see attachments)
    - install drivers from SP_Driver folder

    Backup:
    Just in case make backup (readback in ATC Flash Tool)
    I didnt done it, so if u want, search for guide online

    Flashing process:
    - open flash_tool.exe from ATC_Flash_Tool folder
    - select Download-Agent MTK_AllInOne_DA.bin from ATC_Flash_Tool folder
    - select Scatter-loading File AC8227L_Android_scatter.txt from Firmware folder
    - make sure PRELOADER is not checked. (There isnt any in in my fw. Just in case if u use this guide for some another fw)
    - press Download button
    - connect your USB A to A cable one side to PC, another one to your head unit. I recommend u to use that 4 pin usb port (that one with smaller plastic end), but shouldnt matter.
    - press RST button on your head unit (use some pin, paper clip or toothpick)
    -wait until flashing process ends. There should appear green message.
    - press RST button again and let yout headunit boot.
    - perform factory reset on your head unit to prevent any bugs

    Flashing process error:
    - happends sometimes
    - disconnect your cable
    - if possible, disconnect your head unit from electricity for a while
    - press download again, connect usb cable back, and press RST button.
    - check if your cable is not faulty.
    - for homemade cable try to apply some solder on cable ends, check if ends arent shorted, use tape on them, or buy original cable
    2
    folowed V4A Rom Inclusion
    So, ViPER4Android included in ROM.
    credits to ViPER520
    ViPER’s Audio Website
    ViPER’s Audio XDA Thread
    Users, use “Compatible Mode” if you plan to install other sound mods. No other sound mods included in ROM.
    2
    my radio version is yt9216b_00002_v004_20190801 can i install your

    Mine is not hifi

    Sure. Mine is same.
    HIFI is just EQUALIZER preset for best result. Included into firmware.
    But today i want release update. Its worth to wait.