Junsun V1 MTK8259 - the adapter battle (Kia Ceed Jd) / OEM camera usage / reference thread

[TorstenH]

I bought the Junsun V1 head unit but my Kia Ceed JD had a OEM nav unit which isn't directly compatible to Junsun V1. So I re-wired the wiring harness based on the pins description of my original OEM navigation unit.
I'm only modifying the wiring harness of the Android radio and don't modify wires of the car itself to keep it original.
I removed the wire for USB because my car has a separate connector for USB and I want to use the socket in the centre console (separate post below).

What's working so far:
- Sound (I had to re-wire the speaker outputs, too)
- SWC (Steering Wheel Control)
- OEM microphone
- OEM AUX connector
- FM radio
- USB socket of the centre console
- OEM rear view camera.
- DAB

Additional I had some software hickups:
- The original launcher has a software bug which doesn't allow to add further shortcuts on the home screen. I decided to install AGAMA
- TTS nav software was muted when the radio was running. Can be fixed with firmware update
- Wasn't able to share the internet connection of my smartphone via Bluetooth. But I created an app to enter the hidden Android settings menu:

Junsun V1 - start equalizer/AUX/BT music/CarInfo... from launcher

Additionally to the attached launcher apps you can find here an additional set which e.g. allows to start radio: https://forum.xda-developers.com/t/junsun-v1-start-equalizer-aux-bt-music-carinfo-from-launcher.4237797/post-85047137 The app...

forum.xda-developers.com

 

[TorstenH]

Because the pin/connector description of the seller is not consistent...


you can find the truth here:

According to the second picture and the pin description of the OEM Nav unit I re-wired the wiring harness delivered with the Junsun V1.


If you have the OEM navigation unit LAN2050EKJD


that's the right description of the pins:


----------------------------------------------------------------------------------------------------------------------------------
Here the concrete description how to change the black connector.

I used needles and a small scredriver to unlock the pins and a small knife to bent back the retaining springs. There are special tools availiable to unpin the wires and in review that's a good invest.


GND (with the big electrical contact) --> no change
B+ --> no change
ACC --> no change
USB_Data-, USB_GND, USB_Data+, USB_VCC --> Remove all pins and so the USB wire. We will use this to create our own USB adapter (see separate post).
GND (with the small electrical contact, above Key2) is key ground --> Pin A17
Key2 --> Not needed. Remove the wire and isolate the cable
Key1 --> Pin A5
Auto_ANT (power supply for the active aerial) --> Pin A18
ILL (driving light signal to turn on the button illumination) -> A7
Rear R- --> B11
Rear R+ --> B10
Front R- --> B2
Front R+ --> B3
Rear L- --> B13
Rear L+ --> B12
Front L- --> B4
Front L+ --> B1

The REVERSE cable of the Junsun V1 is just a loose cable. We have to connect it with pin B7.
Junsun doesn't have cinch cables for AUX on the power cable but AUX input on the separate RCA wiring harness:


REVERSE, AUX and MIC:
To get additional cables I bought this wiring harness:

REVERSE:
Remove one wire from the additional wiring harness to get a cable with a crimped pin and connect it to B7. Use a crimp connector to connect it with the loose REVERSE cable to create a contact for the power supply of the OEM reverse camera in one step:


AUX:
Remove the AUX wires from the additional wiring harness and connect them the following way:
AUX left: A10
AUX right: A8
AUX ground (common ground for left and right): A9

MIC:
The Junsun RCA wirign harness has a 3.5mm mono socket to connect an external microphone.

So I removed two more cables from the additional wiring harness and soldered them to to a 3.5mm mono plug. Connect them the following way:
MIC+: A21
MIC-: A22

To improve sound quality I desoldered the internal microphone:
https://forum.xda-developers.com/t/...-usage-reference-thread.4236281/post-87970225

 

[TorstenH]

Today I've got the USB adapter with the RD45 connector:

I removed the pins from the adapter (right side) to add the grey RD45 connector to the Junsun wires (left side). The adapter with the open connection will help me to identify the pin assignment in the car.

Here you can see the finalized wire:

 

[TorstenH]

Junsun V1 - start equalizer/AUX/BT music/CarInfo... from launcher

Additionally to the attached launcher apps you can find here an additional set which e.g. allows to start radio: https://forum.xda-developers.com/t/junsun-v1-start-equalizer-aux-bt-music-carinfo-from-launcher.4237797/post-85047137 The app...

forum.xda-developers.com

Share internet connection via bluetooth

To use the internet connection of my smartphone on the head unit I wanted to use bluetooth. Unfortunately the device manufacturer hides the settings dialog in settings app. So I developed the attached file which just opens the Android activity...

forum.xda-developers.com

 

[TorstenH]

Now I added the adapter for the rear view camera.

No need to say that I had to re-wire this adapter, too. But I got it for 4 EUR without the need to buy the 24 pin connector, the step-down converter and a head shrink to protect the converter.
Most OEM cameras are running on 6V.
The car (Kia Ceed JD) has a separate connector which provides on two pins the video signal and has another two pins for the camera power input. Usually the OEM Nav unit provides the 6V but the adapter is doing this job, now.

Pin description for LAN2050EKJD:

Relevant pins are only:
Pin 12 is the video image being sent to the head unit, pin 24 is the ground wire for the video. Connect cinch plug with pin 12 (inner wire) and pin 24 (shield).
Pin 10 is the positive power for the cam, pin 22 is the ground for the cam power supply.
Connect Step-Down converter 6v output! with pin 10 (+) and pin 22 (-).


I was worried if REVERSE is able to provide enough power for a stable operation of the camera. If not the solution would be to use an electronical relay, get the power from B+ and just use REVERSE as signal. An elecronical relay because a normal relay makes a click sound I don't want to hear as soon as I enter the reverse gear.

But currently it works like a charm. And I'm positive surprised because the Junsun V1 switch to back camers display before boot is completed.

Here you can see how the power supply of the step-down converter is realized:

 

[TorstenH]

Tried to install a DAB/FM splitter. But no change. FM radio is okay but zero stations with DAB. :-(

Now I found a nice guy who will install me the following antenna:

Kombiflex-Antenne - FM/DAB+/GPS mit 5 m Kabelset

Höchste Qualität und Zuverlässigkeit „Made in Germany“ Die ATTB 3761.01 Dachantenne ist eine von Antennentechnik Bad Blankenburg entwickelte und gefertigte Antenne für die Nachrüstung von Fahrzeugen. ATTB ist auf funkbasierte Vernetzungsl...

www.dietzshop.de

I'm using this DAB receiver...

which has a MCX connector:



I connected it with the 6-pins USB port because the 4-pins port is used for firmware updates and connected to the center console of my car.

Works perfectly! No noise, no dropouts!

Please note that some bad shielded USB power plugs can interfere with the reception even on OEM solutions:

 

[TorstenH]

Installed latest firmware from here:

Junsun V1 Pro (MTK8259/MTK8257) - firmware

Latest version for Junsun V1 Pro MTK825X 8259P_军灿UI02v1280x720-国外_v94_20230729.zip https://drive.google.com/file/d/1Vl2Ek89JFEYKqAgMRaMh9sqYS3cKbuwQ/view 8259P_军灿UI02v1280x720-国外_v90_20230628.zip...

forum.xda-developers.com

 

[TorstenH]

Use SWC to switch between Navi and Radio

Attached app FlowStarter.apk allows to start an Automate flow (https://llamalab.com/automate/) which has to be defined in file flowstarter.cfg Required steps: 1. Install the apk. 2. Extract the file flowstarter.cfg to the internal storage (root...

forum.xda-developers.com

Not only interesting if you want to switch between apps with steering wheel key also if you want an app to be immediately present after sleep mode. E.g. you launcher.


In meantime I developed my own app:

[Discontinued] AppSwitcher - smart SWC launcher (for Junsun, Xtrons and similar devices) incl. autostart

AppSwitcher SWC (Steering Wheel Control) app launcher This thread gets continued here Stay focused on the street and don't touch the head units display to switch between apps. Support the development of this free app via...

forum.xda-developers.com

 

[Jamal318]

Because the pin/connector description of the seller is not consistent...
View attachment 5228821

you can find the truth here:
View attachment 5228819
According to the second picture and the pin description of the OEM Nav unit I re-wired the wiring harness delivered with the Junsun V1.


If you have the OEM navigation unit LAN2050EKJD
View attachment 5238523

that's the right description of the pins:
View attachment 5238529

----------------------------------------------------------------------------------------------------------------------------------
Here the concrete description how to change the black connector.
View attachment 5238595
I used needles and a small scredriver to unlock the pins and a small knife to bent back the retaining springs. There are special tools availiable to unpin the wires and in review that's a good invest.


GND (with the big electrical contact) --> no change
B+ --> no change
ACC --> no change
USB_Data-, USB_GND, USB_Data+, USB_VCC --> Remove all pins and so the USB wire. We will use this to create our own USB adapter (see separate post).
GND (with the small electrical contact, above Key2) is key ground --> Pin A17
Key2 --> Not needed. Remove the wire and isolate the cable
Key1 --> Pin A5
Auto_ANT (power supply for the active aerial) --> Pin A18
ILL (driving light signal to turn on the button illumination) -> A7
Rear R- --> B11
Rear R+ --> B10
Front R- --> B2
Front R+ --> B3
Rear L- --> B13
Rear L+ --> B12
Front L- --> B4
Front L+ --> B1

The REVERSE cable of the Junsun V1 is just a loose cable. We have to connect it with pin B7.
Junsun doesn't have cinch cables for AUX on the power cable but AUX input on the separate RCA wiring harness:
View attachment 5238599

REVERSE, AUX and MIC:
To get additional cables I bought this wiring harness:
View attachment 5238605
REVERSE:
Remove one wire from the additional wiring harness to get a cable with a crimped pin and connect it to B7. Use a crimp connector to connect it with the loose REVERSE cable to create a contact for the power supply of the OEM reverse camera in one step:
View attachment 5238601(Don't get irritated by the photo - REVERSE cable of Junsun V1 is brown!)

AUX:
Remove the AUX wires from the additional wiring harness and connect them the following way:
AUX left: A10
AUX right: A8
AUX ground (common ground for left and right): A9

MIC:
The Junsun RCA wirign harness has a 3.5mm mono socket to connect an external microphone.
View attachment 5238599
So I removed two more cables from the additional wiring harness and soldered them to to a 3.5mm mono plug. Connect them the following way:
MIC+: A21
MIC-: A22

Because the pin/connector description of the seller is not consistent...
View attachment 5228821

you can find the truth here:
View attachment 5228819
According to the second picture and the pin description of the OEM Nav unit I re-wired the wiring harness delivered with the Junsun V1.


If you have the OEM navigation unit LAN2050EKJD
View attachment 5238523

that's the right description of the pins:
View attachment 5238529

----------------------------------------------------------------------------------------------------------------------------------
Here the concrete description how to change the black connector.
View attachment 5238595
I used needles and a small scredriver to unlock the pins and a small knife to bent back the retaining springs. There are special tools availiable to unpin the wires and in review that's a good invest.


GND (with the big electrical contact) --> no change
B+ --> no change
ACC --> no change
USB_Data-, USB_GND, USB_Data+, USB_VCC --> Remove all pins and so the USB wire. We will use this to create our own USB adapter (see separate post).
GND (with the small electrical contact, above Key2) is key ground --> Pin A17
Key2 --> Not needed. Remove the wire and isolate the cable
Key1 --> Pin A5
Auto_ANT (power supply for the active aerial) --> Pin A18
ILL (driving light signal to turn on the button illumination) -> A7
Rear R- --> B11
Rear R+ --> B10
Front R- --> B2
Front R+ --> B3
Rear L- --> B13
Rear L+ --> B12
Front L- --> B4
Front L+ --> B1

The REVERSE cable of the Junsun V1 is just a loose cable. We have to connect it with pin B7.
Junsun doesn't have cinch cables for AUX on the power cable but AUX input on the separate RCA wiring harness:
View attachment 5238599

REVERSE, AUX and MIC:
To get additional cables I bought this wiring harness:
View attachment 5238605
REVERSE:
Remove one wire from the additional wiring harness to get a cable with a crimped pin and connect it to B7. Use a crimp connector to connect it with the loose REVERSE cable to create a contact for the power supply of the OEM reverse camera in one step:
View attachment 5238601(Don't get irritated by the photo - REVERSE cable of Junsun V1 is brown!)

AUX:
Remove the AUX wires from the additional wiring harness and connect them the following way:
AUX left: A10
AUX right: A8
AUX ground (common ground for left and right): A9

MIC:
The Junsun RCA wirign harness has a 3.5mm mono socket to connect an external microphone.
View attachment 5238599
So I removed two more cables from the additional wiring harness and soldered them to to a 3.5mm mono plug. Connect them the following way:
MIC+: A21
MIC-: A22

Dear Torstenh,

Because the pin/connector description of the seller is not consistent...
View attachment 5228821

you can find the truth here:
View attachment 5228819
According to the second picture and the pin description of the OEM Nav unit I re-wired the wiring harness delivered with the Junsun V1.


If you have the OEM navigation unit LAN2050EKJD
View attachment 5238523

that's the right description of the pins:
View attachment 5238529

----------------------------------------------------------------------------------------------------------------------------------
Here the concrete description how to change the black connector.
View attachment 5238595
I used needles and a small scredriver to unlock the pins and a small knife to bent back the retaining springs. There are special tools availiable to unpin the wires and in review that's a good invest.


GND (with the big electrical contact) --> no change
B+ --> no change
ACC --> no change
USB_Data-, USB_GND, USB_Data+, USB_VCC --> Remove all pins and so the USB wire. We will use this to create our own USB adapter (see separate post).
GND (with the small electrical contact, above Key2) is key ground --> Pin A17
Key2 --> Not needed. Remove the wire and isolate the cable
Key1 --> Pin A5
Auto_ANT (power supply for the active aerial) --> Pin A18
ILL (driving light signal to turn on the button illumination) -> A7
Rear R- --> B11
Rear R+ --> B10
Front R- --> B2
Front R+ --> B3
Rear L- --> B13
Rear L+ --> B12
Front L- --> B4
Front L+ --> B1

The REVERSE cable of the Junsun V1 is just a loose cable. We have to connect it with pin B7.
Junsun doesn't have cinch cables for AUX on the power cable but AUX input on the separate RCA wiring harness:
View attachment 5238599

REVERSE, AUX and MIC:
To get additional cables I bought this wiring harness:
View attachment 5238605
REVERSE:
Remove one wire from the additional wiring harness to get a cable with a crimped pin and connect it to B7. Use a crimp connector to connect it with the loose REVERSE cable to create a contact for the power supply of the OEM reverse camera in one step:
View attachment 5238601(Don't get irritated by the photo - REVERSE cable of Junsun V1 is brown!)

AUX:
Remove the AUX wires from the additional wiring harness and connect them the following way:
AUX left: A10
AUX right: A8
AUX ground (common ground for left and right): A9

MIC:
The Junsun RCA wirign harness has a 3.5mm mono socket to connect an external microphone.
View attachment 5238599
So I removed two more cables from the additional wiring harness and soldered them to to a 3.5mm mono plug. Connect them the following way:
MIC+: A21
MIC-: A22

Dear Torstenh,

I have almost the same issue with new new MTK8259 6G/128G installed in Toyota Land Cruiser GXR 2015, When i apply reverse gear "old 360 Cameras not working_Black" (see attached).

Hence Brown cable is connected to 360 cameras "red wire", Am I miss something in here?

is old 360 cameras needs new set-ups since new system took place?

"old camera worked in old replaced Tesla" but in this new android device's not working.

Please do the needful.

 

[Jamal318]

thanks for reply,

but i dont understand.....what i have to explain to my audio sytem guy?

 

[TorstenH]

thanks for reply,

but i dont understand.....what i have to explain to my audio sytem guy?

Regarding your reverse camera: The reverse indication seems to work because the app starts automatically but the brown cable is just to identify that you're in reverse gear.
You have to ensure that your camera(s) gets power and if they are running on 6V or 12V. And you need to get the video signal.
You need to google for the PIN description of your original device to have a chance to find the right pins on the wiring harness.

 

[Jamal318]

Regarding your reverse camera: The reverse indication seems to work because the app starts automatically but the brown cable is just to identify that you're in reverse gear.
You have to ensure that your camera(s) gets power and if they are running on 6V or 12V. And you need to get the video signal.
You need to google for the PIN description of your original device to have a chance to find the right pins on the wiring harness.

Thanks dear,

this is the pin diagram. Will you be able to direct me in this regards,
Thanks

 

[TorstenH]

Thanks dear,

this is the pin diagram. Will you be able to direct me in this regards,
Thanks

And I'm sure your car has one or two more connectors which are providing video signal and the PINs the original radio uses to power the camera(s).

 

[TorstenH]

Installed latest firmware from here:

ГУ на процессоре MTK AC8257, MCU: HDBEC/TS-G5 - 4PDA

ГУ на процессоре MTK AC8257, MCU: HDBEC/TS-G5, [Головное устройство][Автомагнитола][Android]

4pda.ru

Make the device really faster.

New firmware for Junsun V1 pro:

8259P_军灿UI02v1280x720-国外_v19_20210806

8259P_军灿UI02v1280x720-国外_v19_20210806.zip

drive.google.com

Has the advertised UI 3.0.

 

[Jamal318]

And I'm sure your car has one or two more connectors which are providing video signal and the PINs the original radio uses to power the camera(s).

I got it fix by my self. Video RCA cable missed to plug-in, everything back to normal. However door notification not been detected.
When I open the door, it doesn’t show on my screen.
I checked all setting in can bus. I don’t see anything related to it

plz advise

 

[TorstenH]

You testet that much and the solution is that you forgot to plug in the cable? You're kidding me.

 

[Jamal318]

You testet that much and the solution is that you forgot to plug in the cable? You're kidding me.

The guy who installed the head unit told me 100% wiring is correct.
I didn’t believe him. Then I checked my self & found that.
he wanted me to buy new 360 cameras from him

 

[Jamal318]

Any idea about for the door notification?

 

[xai1937]

TorstenH thank you so much, I'm in the same situation as you (OEM GPS nav LAN2050EKJD Kia Ceed 2014) and It's hard to find a solution to re-use the factory cables (and we are in the middle of 2022) without any trick but I'll follow your steps to see If I achieve the same as you. Thanks again for your great efford.​

 

[TorstenH]

TorstenH thank you so much, I'm in the same situation as you (OEM GPS nav LAN2050EKJD Kia Ceed 2014) and It's hard to find a solution to re-use the factory cables (and we are in the middle of 2022) without any trick but I'll follow your steps to see If I achieve the same as you. Thanks again for your great efford.​

Good luck
Let me know if it worked and feel free to post further findings.

In meantime I've seen there are Android Head units available with wiring harnesses fitting for cars with the OEM nav unit - but not the Junsun V1 pro. I think most people installing the head units because they don't have one with navigation.
Please be aware that links to firmware in this thread are outdated - you will find newer versions here on XDA.