Database Users

having problems with display

I installed Joying android headunit(RK3188 1024*600) myself. and it was working great.
I also wired reverse camera and steering wheel remote. that was all fine.
but today, when I shift to reverse gear, the headunit display going off and never return without reset button.
Same phenomenon appeared with ILLUMINATE function.
when I turn on the light, display going off.
but headunit was still working. it plays music.
Any solution of this problem?
Sorry for my bad english. Thanks

leeehn said:
I installed Joying android headunit(RK3188 1024*600) myself. and it was working great.
I also wired reverse camera and steering wheel remote. that was all fine.
but today, when I shift to reverse gear, the headunit display going off and never return without reset button.
Same phenomenon appeared with ILLUMINATE function.
when I turn on the light, display going off.
but headunit was still working. it plays music.
Any solution of this problem?
Sorry for my bad english. Thanks
Click to expand...
Click to collapse
How long it worked fine? If ever?
If it worked and now don't, it looks like something got busted in MCU electronics.
I read on net that line from reverse line ght, which activates camera, may introduce overload on some components in MCU. Can't find link right now, but guy was complaining that his camera connector gets hot from prolonged use indicating huge current passing. And as camera is on-chip and cannot get so large current (even with poorest Chinese design there is nothing more than chip inside so there is no possibility of current drain) the current has to flow into MCU side. So I was concerned by that and decided to rethink about that setup. I plan to measure current to MCU and eve to put 1A fuse on reverse light line (that powers camera and goes back to MCU) so I protect both NCU and car from overheating / overload.
Check your setup. Measure reversing current to MCU. If not us high then something is wrong in your MCU. May be just poor / ghost contact (crossover to ground / chassis as I noticed sloppy soldering all around).

pa.ko said:
How long it worked fine? If ever?
If it worked and now don't, it looks like something got busted in MCU electronics.
I read on net that line from reverse line ght, which activates camera, may introduce overload on some components in MCU. Can't find link right now, but guy was complaining that his camera connector gets hot from prolonged use indicating huge current passing. And as camera is on-chip and cannot get so large current (even with poorest Chinese design there is nothing more than chip inside so there is no possibility of current drain) the current has to flow into MCU side. So I was concerned by that and decided to rethink about that setup. I plan to measure current to MCU and eve to put 1A fuse on reverse light line (that powers camera and goes back to MCU) so I protect both NCU and car from overheating / overload.
Check your setup. Measure reversing current to MCU. If not us high then something is wrong in your MCU. May be just poor / ghost contact (crossover to ground / chassis as I noticed sloppy soldering all around).
Click to expand...
Click to collapse
Thanks for your reply. My headunit has worked about 2 weeks. I will check my current of my reverse signal wire.
If current is high(how much criteria for high current?), I will make a circuit to avoid high current using relay.
Anyway, I broke up my headunit. I wish the seller give me a A/S. Thanks again.
I recorded my headunit.
youtu.be/TQIahfupdE8

leeehn said:
Thanks for your reply. My headunit has worked about 2 weeks. I will check my current of my reverse signal wire.
If current is high(how much criteria for high current?), I will make a circuit to avoid high current using relay.
Anyway, I broke up my headunit. I wish the seller give me a A/S. Thanks again.
I recorded my headunit.
youtu.be/TQIahfupdE8
Click to expand...
Click to collapse
I will assume that anything above 10mA is high for reverse current (in fact, if it is properly done it should be almost 0!). Relay will not solve the problem - it will just redirect current not from reverse light but from other source. You have to use current regulation... But then it is question if it will work at all...
Yes, first you have to fix the unit. Then try to check connectors and wiring inside unit for any wrong contacts that may leak current. That is, probably if not catastrophic Chinese design by itself, the most probable cause of current leakage. An if leaks somewhere not directly to the ground, then it is overloading some circuitry...

pa.ko said:
I will assume that anything above 10mA is high for reverse current (in fact, if it is properly done it should be almost 0!). Relay will not solve the problem - it will just redirect current not from reverse light but from other source. You have to use current regulation... But then it is question if it will work at all...
Yes, first you have to fix the unit. Then try to check connectors and wiring inside unit for any wrong contacts that may leak current. That is, probably if not catastrophic Chinese design by itself, the most probable cause of current leakage. An if leaks somewhere not directly to the ground, then it is overloading some circuitry...
Click to expand...
Click to collapse
I found a cause. The XposedMTC made problem.
When I turn on dimming feature with screen filter and I get a problem.
So I didn't install XposedMTC application and no more display issue.
Thanks for helping me!

leeehn said:
I found a cause. The XposedMTC made problem.
When I turn on dimming feature with screen filter and I get a problem.
So I didn't install XposedMTC application and no more display issue.
Thanks for helping me!
Click to expand...
Click to collapse
Great! I'm happy it is not a HW issue for you! Also, thank you for update.
BTW I also had a problem with XposedMTC module. After your confirmation of the issue, I will definitely disable it for good!

Hello,
Same issue here with my huifei , but even with xposed disabled still have the reverse gear to switch off the display
Regards
eexray

eexray said:
Hello,
Same issue here with my huifei , but even with xposed disabled still have the reverse gear to switch off the display
Regards
eexray
Click to expand...
Click to collapse
I performed full wipe of my headunit and re-install rom on a recovery mode.
Maybe you cannot see anything in recovery mode but you can enter the mode and assume the cursor.

leeehn said:
I performed full wipe of my headunit and re-install rom on a recovery mode.
Maybe you cannot see anything in recovery mode but you can enter the mode and assume the cursor.
Click to expand...
Click to collapse
In fact When I try to put the unit in recovery mode my screen is off, after a minute or so it shows the logo ( Audi) and the unit starts.
Tried to install A rom from rockchip batch toll but even installing rom I still have the same issues. No recovery on the screen, and the issue with the reverse gear
Assuming that even with no screen I can go to recovey, 'will try to full wipe. Must check the steps to do it with no screen.
Many thanks
eexray

eexray said:
In fact When I try to put the unit in recovery mode my screen is off, after a minute or so it shows the logo ( Audi) and the unit starts.
Tried to install A rom from rockchip batch toll but even installing rom I still have the same issues. No recovery on the screen, and the issue with the reverse gear
Assuming that even with no screen I can go to recovey, 'will try to full wipe. Must check the steps to do it with no screen.
Many thanks
eexray
Click to expand...
Click to collapse
Got the same problem and I'm almost sure it has to do with XposedMTC. Maybe it hasn't been uninstalled correctly. Have you been able to reset in recovery mode without the screen? Also when I try so get into recovery, my hard buttons blink white

Reverse Camera Not Working

I have recently updates my firmware and rooted my device. Since then my reverse camera has stopped working.
Does anyone know what this could be?
Sent from my iPhone using Tapatalk

Martin0Maggiore said:
I have recently updates my firmware and rooted my device. Since then my reverse camera has stopped working.
Does anyone know what this could be?
Sent from my iPhone using Tapatalk
Click to expand...
Click to collapse
And the brand is, what firmware and what MCU. You took a photo of your original setting I suppose.

Hi
Yes I did take a picture of my original settings. No idea what make the unit is though. I don't know how to find out?
The MCU has remained the same but the firmware is now Malaysks latest firmware.
Everything on it runs perfect but now when I put it into reverse the screen is black.
Sent from my iPhone using Tapatalk

Martin0Maggiore said:
Hi
Yes I did take a picture of my original settings. No idea what make the unit is though. I don't know how to find out?
The MCU has remained the same but the firmware is now Malaysks latest firmware.
Everything on it runs perfect but now when I put it into reverse the screen is black.
Sent from my iPhone using Tapatalk
Click to expand...
Click to collapse
Next question, Can-bus or Direct reverse? Easiest is to check if you get +12 volt at reverse input at the HU when you're in reverse.
Normally it's an orange with a black strip being reverse cable.

Well that's a good point actually. In the factory settings canbus is marked as None. I couldn't find anything matching my car in the list so left it. Could that be it?
It is a 12volt reverse wire I believe. Into the reverse light.
Sent from my iPhone using Tapatalk

Martin0Maggiore said:
Well that's a good point actually. In the factory settings canbus is marked as None. I couldn't find anything matching my car in the list so left it. Could that be it?
It is a 12volt reverse wire I believe. Into the reverse light.
Sent from my iPhone using Tapatalk
Click to expand...
Click to collapse
If it is a wire, do as I said, check the voltage when in reverse. Should be around +12V.
If the camera is connected straight to the HU-loom cam input, the can-bus has nothing to do with
reverse.
Since you took a picture, check your recent setting for the can-bus in factory settings.

It came on kind of but in very faint black and white. Something isn't quite right with it.
Sent from my iPhone using Tapatalk

Hi finally you solved??
Mine is mor strange...
My unit detect the reverse (have a reverse in cable) mute the sound...but doesnt change to rear camera..stays on the actial app
I install redmod...flash original..and nothing change...it happens aleatory...have the reverse over 5 mins and work...later doesnt...maybe willl be the board?
And..i rewire..and change the cam

Help with Android Head Unit install in 2013 Audi Q5 (p60? Android 10?) (backup camera, mmi controls, air bag light)

Hello, I hope this is the right place, I keep finding this forum every time I search trying to trouble shoot my issues. Long story short, I had been eyeing these head units for my Q5 to add CarPlay, a local installer recommended the same model, and I thought great, so I ordered it and they installed it. I am however having 3 issues, and while the seller has been helpful, they are on a completely different time zone and it’s not progressing well unfortunately. The installer can’t find anything wrong. Little did I know what I was getting into, and I can’t find a manual or even a specific model number to search on.
My Car:
2013 Audi Q5 MMI (3g, gps nav, etc built in, AMI port in glove box, but everything else is in the center console under the screen)
Unit I installed as recommended by installer:
Android 10.0 Head Unit for Audi Q5 2009-2017 Car GPS Navi Stereo Radio 4G BT RDS 732910618142 | eBay
Find many great new & used options and get the best deals for Android 10.0 Head Unit for Audi Q5 2009-2017 Car GPS Navi Stereo Radio 4G BT RDS at the best online prices at eBay! Free shipping for many products!
www.ebay.com
My 3 issues:
1) My OEM backup camera does not show video. The radar sensors work. When I put the car into reverse the unit changes to backup mode, but the video image is black. There are multiple backup camera options in the software, I have tried them all. The after market selections at least give me the radar visual and lane lines, but still no video feed. The OEM option only shows me a black screen with a picture of a Q5 on the right.
2) The audio from the head unit is not coming through the car stereo. None of the center console controls work. The right 2 control buttons around the knob are both always flashing slowly. Only Radio works and can be controlled by steering wheel. My phone seems to be synced to car‘s original Bluetooth, and audio takes over when I get a call.
3) My airbag light in the dash is on. I am certain this is because the bezel they sent me only has the hazard light switch.
The unit otherwise is getting better and better as I learn to use it and CarPlay, which I ultimately bought it for, is working well too. My wife and I though are really struggling without the backup camera, and I fear I’ll be ripping the whole thing out and putting the original unit back in if I can’t fix that.
I have pictures of everything inside and out I can share. I’ll add them later as I can. But since this forum keeps coming up in my searches, I thought I would get a conversation started and see if anyone could help me. Really appreciate any assistance in advance. At this point I’ve become versed in taking the car apart and can get behind the entire vertical stack in the center and have confirmed what I can. I’m pretty handy with software as well.
(At the very least to start, a picture of my backup camera options in the software, I’ve tried them all)

jcapxda said:
Hello, I hope this is the right place, I keep finding this forum every time I search trying to trouble shoot my issues. Long story short, I had been eyeing these head units for my Q5 to add CarPlay, a local installer recommended the same model, and I thought great, so I ordered it and they installed it. I am however having 3 issues, and while the seller has been helpful, they are on a completely different time zone and it’s not progressing well unfortunately. The installer can’t find anything wrong. Little did I know what I was getting into, and I can’t find a manual or even a specific model number to search on.
My Car:
2013 Audi Q5 MMI (3g, gps nav, etc built in, AMI port in glove box, but everything else is in the center console under the screen)
Unit I installed as recommended by installer:
Android 10.0 Head Unit for Audi Q5 2009-2017 Car GPS Navi Stereo Radio 4G BT RDS 732910618142 | eBay
Find many great new & used options and get the best deals for Android 10.0 Head Unit for Audi Q5 2009-2017 Car GPS Navi Stereo Radio 4G BT RDS at the best online prices at eBay! Free shipping for many products!
www.ebay.com
My 3 issues:
1) My OEM backup camera does not show video. The radar sensors work. When I put the car into reverse the unit changes to backup mode, but the video image is black. There are multiple backup camera options in the software, I have tried them all. The after market selections at least give me the radar visual and lane lines, but still no video feed. The OEM option only shows me a black screen with a picture of a Q5 on the right.
2) The audio from the head unit is not coming through the car stereo. None of the center console controls work. The right 2 control buttons around the knob are both always flashing slowly. Only Radio works and can be controlled by steering wheel. My phone seems to be synced to car‘s original Bluetooth, and audio takes over when I get a call.
3) My airbag light in the dash is on. I am certain this is because the bezel they sent me only has the hazard light switch.
The unit otherwise is getting better and better as I learn to use it and CarPlay, which I ultimately bought it for, is working well too. My wife and I though are really struggling without the backup camera, and I fear I’ll be ripping the whole thing out and putting the original unit back in if I can’t fix that.
I have pictures of everything inside and out I can share. I’ll add them later as I can. But since this forum keeps coming up in my searches, I thought I would get a conversation started and see if anyone could help me. Really appreciate any assistance in advance. At this point I’ve become versed in taking the car apart and can get behind the entire vertical stack in the center and have confirmed what I can. I’m pretty handy with software as well.
(At the very least to start, a picture of my backup camera options in the software, I’ve tried them all)
Click to expand...
Click to collapse
Sorry to say, issue 1 and 3 are quite sure installation issues.
For the first one: Quite clear and could be measured: The backup camera has no power. There should be a connector for the power feed. --> instructions.
Third one: They removed the connector for the airbag, while checking the unit with ignition on. Can be reset at the dealer or by someone who has the right tooling.
Second one: Look into the settings of the unit and check the settings for the CAN box. 2 possibilities here: You got the wrong CAN box or the setting is not set to external amplifier.

@rigattoni thank you
rigattoni said:
Sorry to say, issue 1 and 3 are quite sure installation issues.
For the first one: Quite clear and could be measured: The backup camera has no power. There should be a connector for the power feed. --> instructions.
Click to expand...
Click to collapse
Well installation issues, at this point I think I can fix (famous last words). Getting parts / seems to be harder with communication challenges. (was instructions supposed to be a link?)
I pulled things out last night, I didn't find the RCA yellow video in I expected (there are 2 but they both seemed to be for aftermarket and are disconnected. There wasn't the obvious yellow <-> yellow rca adapters I see everyone else have with the power feed to the reverse lights. I'm assuming it's (in theory) feeding in through the primary adapter (block of plugs) going in to the back of the Android unit. I was able to account for all other connectins.
rigattoni said:
Third one: They removed the connector for the airbag, while checking the unit with ignition on. Can be reset at the dealer or by someone who has the right tooling.
Click to expand...
Click to collapse
They reset it, it keeps coming back on. My original had a light, this bezel doesn't. As I understand there is likely some resisitance that's supposed to be here ...
rigattoni said:
Second one: Look into the settings of the unit and check the settings for the CAN box. 2 possibilities here: You got the wrong CAN box or the setting is not set to external amplifier.
Click to expand...
Click to collapse
Thanks, I will check settings. There's a "key settings" and offers 4 & 8. It's the only major configuration section I don't understand. But I think I've tried both. Will look again.

jcapxda said:
Well installation issues, at this point I think I can fix (famous last words). Getting parts / seems to be harder with communication challenges. (was instructions supposed to be a link?)
Click to expand...
Click to collapse
No link, the seller should at least provide some installation instruction with the unit.
As I don´t know the unit and don´t know what has been provided with the unit itself, I am not able to help.
Your backup camera should have a video output which needs to get connected with the head unit. Where to put, needs to get from the seller. If he is not able... send this crap back.
The same for the airbag error message... If the seller is not able to give clear instruction... send the crap back.

Seller finally agreed they didn't send me all the right cables. Specifically they mentioned I need an AMI cable, but also the LVDS plug (in the photo above, in the top left) ... should have an adapter. Which I've specifically asked them about a few times in pictures, but as I suspected it, it can't just be unplugged and needs an adapter to plug into the rest. So... those are on their way, we'll see. I suspect the OEM backup cam video comes in via that cable based on my research and wiring diagrams, but again, we'll see.

jcapxda said:
Seller finally agreed they didn't send me all the right cables. Specifically they mentioned I need an AMI cable, but also the LVDS plug (in the photo above, in the top left) ... should have an adapter. Which I've specifically asked them about a few times in pictures, but as I suspected it, it can't just be unplugged and needs an adapter to plug into the rest. So... those are on their way, we'll see. I suspect the OEM backup cam video comes in via that cable based on my research and wiring diagrams, but again, we'll see.
Click to expand...
Click to collapse
Good to know.
Did they give you a guide how to fix the airbag issue?
Just to let you know: In case of an accident, the airbags can be activated or not without control. This is a severe security issue, you should take care of.
The AMI cable just provides audio and is normally used for external audio sources like iPod, IPhone and such things. May be they use it to get the head unit speaking to your OEM amplifier. I don´t know your unit and the specs. At least Audi is not that easy with these kind of units.

Well, predictably, nothing's easy.
They sent me a splitter cable for the airbag (passenger occupancy light) and hazard button. (but there's only one input to split into ....
LVDS cable was missing, so that connects the LVDS feed -> back of android. I do finally have some sight to the OEM UI, but only briefly, and I can't interact with it with any buttons. The backup camera will come on but only briefly, and only the first time. After that it cuts to OEM nav, and then only for a second.
AMI adapter (straightforard) would in theory help audi, but I suspect the priori issue with the oem system and lack of mmi buttons working is somehow blocking control / and thus "aux" audio.
However, at the least, I was able to remove the OEM occupancy / hazazrd button, and attach it to the splitter they gave me. Tucked it into the dash (meaning I can't... see the light but for now fine) and cleared the Air bag code. And yes, air bag stays off. Finally. So that's better.
I'm awaiting their reply on all the rest. Driving me crazy. Based on searches, I'm starting to wonder if this is programmed for the wrong baud rate? I only vaguely know these terms, but have stumbled across similar symptoms of people retrofitting MMI 3G+ and issues witht the controls not working, flashing red lights.

jcapxda said:
Well, predictably, nothing's easy.
They sent me a splitter cable for the airbag (passenger occupancy light) and hazard button. (but there's only one input to split into ....
LVDS cable was missing, so that connects the LVDS feed -> back of android. I do finally have some sight to the OEM UI, but only briefly, and I can't interact with it with any buttons. The backup camera will come on but only briefly, and only the first time. After that it cuts to OEM nav, and then only for a second.
AMI adapter (straightforard) would in theory help audi, but I suspect the priori issue with the oem system and lack of mmi buttons working is somehow blocking control / and thus "aux" audio.
However, at the least, I was able to remove the OEM occupancy / hazazrd button, and attach it to the splitter they gave me. Tucked it into the dash (meaning I can't... see the light but for now fine) and cleared the Air bag code. And yes, air bag stays off. Finally. So that's better.
I'm awaiting their reply on all the rest. Driving me crazy. Based on searches, I'm starting to wonder if this is programmed for the wrong baud rate? I only vaguely know these terms, but have stumbled across similar symptoms of people retrofitting MMI 3G+ and issues witht the controls not working, flashing red lights.
Click to expand...
Click to collapse
Hello where did you put the splitter into?
1 goes to the original cable
1 goes to the new framepanel (without the air bag light)
and where goes the third cable?
Please help thx

Eonon head unit BMW e39

Hello there.
I would like to get some help regarding eonon GA9449-UA0153 head unit for bmw e39..
My friend went in settings and changed user version, then the unit restarted and never came back on again.
I fixed some of these android units before that had the YD1821B power management ic blown but never found this issue.
I suppose the firmware should be written again. The unit draws only 25 mah and doesnt boot. Tried using the reset button in combination with power button in 100 ways.. No luck.
Can any of you help me with firmware file(s) and give me a little guide on how to upload it ? The unit has a USB port on the back, close to the FM antena.
I'm willing to even pay someone that can help me revive it.
Thank you!
In this link you can see pictures of it cause I can't upload them here.. they are too big.
WeTransfer - Send Large Files & Share Photos Online - Up to 2GB Free
WeTransfer is the simplest way to send your files around the world
we.tl

Hi, I ran into the same issue installing the same GA9449-TE0180 (I don’t think the second part matters as much) for my E39. Tried everything, checked fuses, checked voltage and it reads 12 volts coming from the connectors. I’ve tried everything you’ve done except take it apart. Have you found a solution?

Im_elmoh said:
Hi, I ran into the same issue installing the same GA9449-TE0180 (I don’t think the second part matters as much) for my E39. Tried everything, checked fuses, checked voltage and it reads 12 volts coming from the connectors. I’ve tried everything you’ve done except take it apart. Have you found a solution?
Click to expand...
Click to collapse
Nope, not yet. Seems like nobody knows any fix yet.

Hey I found the issue with mine. Turns out it was a bad CAN bus decoder. I unplugged it and shorted the yellow and red wires together and the unit powered on immediately and everything seems to work. This might be your issue as well. I’m going to order a new can bus decoder and put everything back together.

Im_elmoh said:
Hey I found the issue with mine. Turns out it was a bad CAN bus decoder. I unplugged it and shorted the yellow and red wires together and the unit powered on immediately and everything seems to work. This might be your issue as well. I’m going to order a new can bus decoder and put everything back together.
Click to expand...
Click to collapse
I'm glad to hear that. It's not the case on mine. I powered it right through de output of the can bus wires. +12v on red and yellow and still nothing.

Well new issue, after fiddling with the device and getting stuff set up, it shut off on me and I found that there isn’t any voltage going to the radio harness. I checked fuses and they’re all good so I can’t imagine why

anyone?...

Reverse camera turns on when i go above 40mph (HELP)

Hi
Just fitted this unit to my volvo c70 mk2 2006.
https://a.aliexpress.com/_Eu0IrVr
I have got the device to work perfectly but there is one problem.
When ever I go over 40mph the screen switches on to the reverse camera and that only stops when I go back below 40mph.
There is saddly no way to just turn off the reverse camera in the settings and if I unplug it the screen still goes back with no signal in the middle of it.
If Any one has any input why this is happening or how to solve it I would be very grateful.

Here is what the unit is running on currently.

Are you using a CAN BUS box?

TorstenH said:
Are you using a CAN BUS box?
Click to expand...
Click to collapse
Yes the box was included.

TorstenH said:
Are you using a CAN BUS box?
Click to expand...
Click to collapse
I will add that my car is not in the options they provide so im using the volvo all option.

Thedivinesinner said:
I will add that my car is not in the options they provide so im using the volvo all option.
Click to expand...
Click to collapse
I think the can box is connected to PIN 14 of the heat unit and can control the head unit to switch to the reverse camera.
The CAN box might misinterpret a CAN signal and outputs a 12V+ signal to pin 14.

This is what I have no wire is going I to pin 14 though. Only a blue going pin 15

Thedivinesinner said:
This is what I have no wire is going I to pin 14 though. Only a blue going pin 15
Click to expand...
Click to collapse
Then you should check if you can find another CAN setting which is compatible with the box.
Usually there should be a factory setting where you can select your car/model.

TorstenH said:
Then you should check if you can find another CAN setting which is compatible with the box.
Usually there should be a factory setting where you can select your car/model.
Click to expand...
Click to collapse
There is only volvo option in OD even though it says its for a c70 etc.

Ok solution/work around.
The pin on the canbus unit that controls the reverse camera was pin 7.
I have cut the wire to this pin an spliced s switch in.
When I need the camera to reverse onto my caravan flick the switch in go into reverse.
Not quite as intended but it fixed the issue.
Thanks for all the help!