Junsun V1/Pro Megathread

[mopfi]

This thread is consolidating all the information of Junsun V1 and V1Pro devices scattered in the Android Head-Units forum. I want to write and extend this to make it easier for new people. It's sometimes difficult to find the right information.

Warning: Some of these commands are altering the system. If something goes wrong you can brick your device. Be sure you know what you're doing. I'm not responsible for any damages!

General Other Threads​

Junsun V1​

Junsun V1 Pro​

Junsun V1 Pro Firmware (8259)​

Junsun V1 Pro Firmware (8227L)​

Junsun V1 (8667Q)​

Firmware​

Updating the device firmware​

Junsun V1 Pro firmware files​

Root​

ADB connection​

Root with Magisk​

Writable System​

 

[mopfi]

Updating Firmware​

Preparation​

• USB drive formatted as FAT32
• Files for update (*.bin, *.upd) need to be in the root directory of the USB drive

Starting the Update​

The update should start automatically when the USB drive is plugged in. A pop-up appears that says that an update will start. After a few seconds the device will reboot and install the update.

If this doesn't work, plug in the USB stick and restart the device with a needle in the reset button. When the device starts up move one finger on the touchscreen around and wait for a green detected message at the top of the screen. The update will start.

Problem solving​

I don't have a *.upd file
That is OK, the file does mot contain any information. Just create a new empty file and rename it like the *.bin file. As example, if you have a 8259.bin create a 8259.upd file.

The device doesn't recognize my USB thumb drive
There are 2 USB connectors on the back of the device. If one does not work, try the other. Make sure your thumb drive is formatted as FAT32.

Firmware Files​

This list is made by taking links from different firmware threads (found in first post). Every entry has a link to the original posts. Please be careful when flashing, the files need to match the correct CPU and screen resolution. If you have files for the normal V1 or different screen resolutions you can send me a PM.

Junsun V1 Pro | 8259 | 1280 x 720:​

Download	Original Post	Verified
8259P_军灿UI02v1280x720-国外_v20_20210907.zip	here
8259P_军灿UI02v1280x720-国外_v27_20211201.zip	here
8259P_军灿UI02v1280x720-国外_v31_20220225.zip	here
8259P_军灿UI02v1280x720-国外11_v1_20220323.zip	here
8259P_军灿UI02v1280x720-国外11_v3_20220422.zip	here
8259P_军灿UI02v1280x720-国外_v44_20220920.zip	here
8259P_军灿UI02v1280x720-国外_v50_20221226.zip	here	mopfi

Junsun V1 Pro | 8227L:​

Download	Original Post	Verified
8227L_8军灿UI03-国外10_v7_20210814.zip	here
8227L_8军灿UI03-国外10_v21_20211130.zip	here
8227L_8军灿UI03-国外11_v3_20220714.zip	here

Junsun V1 | 8667Q | 720 x 1280:​

Download	Original Post	Verified
8667Q军灿UI02-国外-VHD720x1280_v11_20211207.zip	here
8667Q军灿UI02-国外-VHD720x1280_v12_20220214.zip	here
8667Q军灿UI02-国外-VHD720x1280_v13_20220510.zip	here
8667Q军灿UI02-国外-VHD720x1280_v23_20220801.zip	here

Factory Reset​

Settings -> Car Infotainment -> About Device -> Settings Icon -> Code 8878 -> Erase all Content

 

[mopfi]

ADB Connection​

Preparation​

1. Activate Developer options. You have to click a few times on the build number until you are a developer: Settings -> System -> About Car -> Build number
2. Activate USB debugging. Settings -> System -> Developer options -> USB debugging
3. Use the 4-pin USB connection on the back of the device. Connect with a USB A <-> USB A cable. My device had a female Mini USB adapter for using a Mini USB cable.

Connect​

Use adb to connect to the device

adb shell

Problem solving​

ADB can't find any devices

It could be that the ADB connection with the device is not working. This means that the corresponding option is not set. This can be done temporary or permanent.

Temporary Connection

To make the connection with adb work temporary we can change the USB setting of the device. To do that we need to set Settings -> USB Preferences -> USB controlled by -> This device. No it should be possible to connect via ADB. The connection is temporary, because after a reboot it is gone and has to be set again.​

Permanent Connection

We can enable the connection permanently by changing a value in the secret menu. Go to Settings -> About Device -> Cogwheel (top right) -> Code 8878 -> Others -> USB2 Debug -> Enable​

Can't find USB Preferences

Go to Settings and click the search icon in top right corner. Type in usb and then click USB controlled by.

 

[mopfi]

Root​

Create boot.img​

Connect via adb to the device and find the location of the boot partition. The star '*' has to be replaced according to your device. For my Junsun V1Pro it is bootdevice. In the next step we will create a copy of the boot partition. Please be careful with dd command. It will overwrite wrong files or partitions if you do a mistake.

adb shell
su @#zxcvbnmasdfghjklqwertyuiop1234567890,.
ls -l /dev/block/platform/*/by-name/
dd if=/dev/block/platform/*/by-name/boot of=/sdcard/boot.img

Patch boot.img​

Install Magisk apk on your device. I used Magisk v23.0 from here: https://github.com/topjohnwu/Magisk

1. Open the app and click on top right Install button
2. Then click next and choose Select and Patch File
3. Select your boot.img and let Magisk patch it.
4. Copy the new created file to your computer. The filename will be similar to magisk_patched_23000_***_boot.img

adb pull /sdcard/magisk_patched_boot.img <older_on_your_computer>

Flash magisk_patched_boot.img​

adb reboot bootloader
fastboot flash boot magisk_patched_boot.img
fastboot reboot

Writable System​

To make the system writable we need to remount the partitions.

adb shell
su @#zxcvbnmasdfghjklqwertyuiop1234567890,.
remount

Now we need to reconnect and then we can write to the system (i.e. copy a file)

adb shell
cp /sdcard/myapp.apk /system/app

 

[mopfi]

Reserved

 

[mopfi]

Reserved

 

[Cubanlink81]

Hey all, I need help with my junsun v1 pro 4gb +64gb-mtk8259- I just had it installed and everything works except Bluetooth. I can make calls from unit and or my cell phone. Apparently the people I call can hear me but I can't hear them. On occasion as it dialing I hear the ringing for a second then it cuts out. Is this a hardware issue, install issue, or something I need to change in secret menu?? I've reached out to junsun with no luck. I fixed the issue with the swc thanks to this forum!! Hoping someone can help me. Car is chrysler 300c and phone is samsung galaxy note 20.

 

[tihodimitrov]

Hey all, I need help with my junsun v1 pro 4gb +64gb-mtk8259- I just had it installed and everything works except Bluetooth. I can make calls from unit and or my cell phone. Apparently the people I call can hear me but I can't hear them. On occasion as it dialing I hear the ringing for a second then it cuts out. Is this a hardware issue, install issue, or something I need to change in secret menu?? I've reached out to junsun with no luck. I fixed the issue with the swc thanks to this forum!! Hoping someone can help me. Car is chrysler 300c and phone is samsung galaxy note 20.

Hi, I have the same problem, if you have found a solution to the problem please share it with me! Thanks!

 

[Cubanlink81]

I am trying to mess with the secret menu. Like bt sync type, volume, three is various options in there related to Bluetooth just don't want to screw it up worse. Hopefully someone can shed some light cuz if not I'm returning it. I'll have to pay to take it out....ughh...I love the look though, if not I would just get pioneer but it don't look stock like this

 

[Cubanlink81]

So I Brought it back to my installer and he fixed it. Apparently in my car the speaker inputs were reversed, that why I couldn't hear anyone through speakers. He told me some cars with 6 plus speakers have this problem when installing these type of units. Loving the unit now that's its all fixed.

 

[bartekm01]

Hello

I have Junsun V1 pro 4/64g and my unit is hanging on Google boot logo (Android 9).
Does some one know how to get to recovery to do wipe cash / do factory reset?

Thanks

 

[pau_18]

I have the junsun v1 1gb, it does not enter the google play services.
I would like you to provide me with a ROOM image to update or factory reset.
Thanks!

 

[mopfi]

Does some one know how to get to recovery to do wipe cash / do factory reset?

I'm actually also looking for a way how to boot into the recovery. Haven't found one at the moment.

For your problem you could try and flash an update (or same version again). Description is in this thread.

 

[bartekm01]

Hi
Unfortunately updates are also not booting / updating while reseting. Plugging USB pendrive with update files to second USB port and against resting button still can't manage to update - radio is botting "normally" and ends up with bootloop

 

[mopfi]

Try both USB ports.
Plug the drive in turn the device on and then move a finger on the touchscreen. I do a left right movement. If that doesn't work you will need to do it with the mtk tools and a scatter file.

 

[jask05]

Hi!! Are there any way to disable calls from SIM card ? Thanks

 

[di_greenio]

Hi, I purchased the Junsun V1 pro 6gb/128gb and am pretty happy with it. All the important things connected and worked straight away which was grand. One thing I wanted to check is the battery draining problem and the cutting of the 2 wires to prevent this. I found the Junsun diagram and on there it seems it's the red and orange wires (that "look" to run from the main black block to the black power block for the head unit). The query I have is those wires on my loom run from the canbus white block to the black power block in the head unit. Pictures attached to hopefully show this a bit better. Excuse the terminology Has anyone had any experience with this at all? TIA

 

[Sowmaxwel]

Hi Everyone,

Can someone please help me how to factory reset code or the new firmware my Junsun v1 pro 9 inch 8G + 128 GB Radio chip MS98. i tried 8888 or 8878 but i can see no factory reset only factory setting.

thank you advance.

 

[Prabin1001]

Hey does anyone know how to completey reset the AutoLink app? I tried disabling and enabling again but. Nothing works. I just want to get ride of Android auto activated from AutoLink.

 

[di_greenio]

Hi Everyone,

Can someone please help me how to factory reset code or the new firmware my Junsun v1 pro 9 inch 8G + 128 GB Radio chip MS98. i tried 8888 or 8878 but i can see no factory reset only factory setting. View attachment 5572199
thank you advance.

I have the 6gb, not sure what chip. When you go into the menu after code 8878 it should say on the right in the middle "Erase All" I think. Then it asks you if you want to factory reset.