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Question NaviFly 7862 steering wheel controls not working

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andrei-2200

New member
Jul 5, 2021
2
1
OnePlus 7T
Hi
I have purchased an Android HeadUnit for my Renault Megane 2 (2007) from AliExpress. Every function works except the steering wheel controls. The unit has the UIS7862 CPU @1.8Ghz, 6gb Ram and 128gb storage. I have installed the CanBox correctly and tried many CanBox settings in factory menu, but I cannot get the control app to enter learning mode. Does anyone have any idea? Maybe the built in key map application is at fault (com.syu.steer).
 

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MasK

Senior Member
May 15, 2005
1,266
129
Singapore
www.imraneo.com
Did you find a solution to your problem yet?
I'm stuck at the exact same scenario, same unit. The support over at AliExpress mention to me to select "XP" for canbox settings. However, my canbus module is by Raise, hence I should be using the "RZC"
Also, my reverse cam doesnt work too.
Pls share your findings. Thank you!
 

andrei-2200

New member
Jul 5, 2021
2
1
OnePlus 7T
I got the steering wheel keys to work with a custom controller made by an engineer in my country specifically for my car and my HeadUnit. The controller is connected directly to the wheel controls and the "key" wire on my HeadUnit. I had to disassembly the steering wheel base and route the cable around the original one. Now I can map every key to an action in the Key Learning app. For the backup camera, because I used a wireless kit, I couldn't use the "back" camera wire to trigger the HeadUnit to switch to it. The kit came with a receiver which only had power wires and a yellow RCA cable. I wired the receiver's power cables to the ACC power so that the receiver only powers on when the engine is running and I managed to map a button on the steering wheel to switch to the RCA input. Now when I want to use back up camera, I just need to press a button to see the image. The camera's transmitter is wired to the license plate bulb and I managed to fit it in the rear bumper.
This wasn't a "plug and play" experience that the Chinese seller promised, but overall I can say I am pretty happy with the end result. The audio quality is wayyy better than the stock HeadUnit. I didn't know that my stock speakers could get that loud and have so much bass. The DSP chip does it's job wonderfully. Also the radio reception is better than with the stock unit. The Android HeadUnit is fast and snappy. Apps open almost instantly and those 6gb of ram really help. I could compare the overall user experience with my OnePlus 7 phone. The unit also cold boots very quickly. The wifi reception is pretty poor. The unit shows 75% signal when my phone is in the car. It doesn't bother me because I put a Sim card in the unit and the mobile reception is as good as on my phone.
 
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MasK

Senior Member
May 15, 2005
1,266
129
Singapore
www.imraneo.com
I got the steering wheel keys to work with a custom controller made by an engineer in my country specifically for my car and my HeadUnit. The controller is connected directly to the wheel controls and the "key" wire on my HeadUnit. I had to disassembly the steering wheel base and route the cable around the original one. Now I can map every key to an action in the Key Learning app. For the backup camera, because I used a wireless kit, I couldn't use the "back" camera wire to trigger the HeadUnit to switch to it. The kit came with a receiver which only had power wires and a yellow RCA cable. I wired the receiver's power cables to the ACC power so that the receiver only powers on when the engine is running and I managed to map a button on the steering wheel to switch to the RCA input. Now when I want to use back up camera, I just need to press a button to see the image. The camera's transmitter is wired to the license plate bulb and I managed to fit it in the rear bumper.
This wasn't a "plug and play" experience that the Chinese seller promised, but overall I can say I am pretty happy with the end result. The audio quality is wayyy better than the stock HeadUnit. I didn't know that my stock speakers could get that loud and have so much bass. The DSP chip does it's job wonderfully. Also the radio reception is better than with the stock unit. The Android HeadUnit is fast and snappy. Apps open almost instantly and those 6gb of ram really help. I could compare the overall user experience with my OnePlus 7 phone. The unit also cold boots very quickly. The wifi reception is pretty poor. The unit shows 75% signal when my phone is in the car. It doesn't bother me because I put a Sim card in the unit and the mobile reception is as good as on my phone.
Thank you for explaining your solution. Seems like quite a bit of work.
I managed to get my steering controls working finally. Got the correct canbus setting and corrected a connection.

Now, I'm stull stuck with the reverse cam issue. The +12V does energize when I am in reverse gear - I tested this when I connected my cam to DV-in and cam turns on only when in reverse.
But I just don't understand why the Android won't switch to Cam in during reverse gear.
Will continue to seek help from the manufacturer. Otherwise, it's a great HU as you said. Awesome speed!
 

TorstenH

Senior Member
Feb 20, 2021
423
83
Thank you for explaining your solution. Seems like quite a bit of work.
I managed to get my steering controls working finally. Got the correct canbus setting and corrected a connection.

Now, I'm stull stuck with the reverse cam issue. The +12V does energize when I am in reverse gear - I tested this when I connected my cam to DV-in and cam turns on only when in reverse.
But I just don't understand why the Android won't switch to Cam in during reverse gear.
Will continue to seek help from the manufacturer. Otherwise, it's a great HU as you said. Awesome speed!
You connected the reverse wire?
Maybe this triggers the camera view of it doesn't work via the canbus.
 

MasK

Senior Member
May 15, 2005
1,266
129
Singapore
www.imraneo.com
Not all canbus provide the reverse signal. So maybe you have to provide the reverse signal on the separate input.
I feel that the HU knows when I am referring (CANBUS might be working here), because the 12V turns on when Im in reverse. The only issue is the HU doesnt switch to the cam automatically. Looks to me like a SW issue. Still awaiting reply from manufacturer.

Also, I realised my backward/forward buttons are swapped. Why is it I can't re-learn them?
 

mastrv

Senior Member
Jul 1, 2010
173
47
It may not be the same for the Navifly, but on my unit, G5 must get the proper voltage to "detect" the car has been put in reverse. I'm re-using my factory rear view camera and it's a 6.5V camera. However, I had to up the voltage to 8.6V so that G5 go that voltage...then the rear image showed up. I reused the car wiring and that's why I had to do this.

Check the voltage that G5 is getting. With a canbus module, I believe there is a wire from the canbus going to G5. If no voltage, make sure the pins are in properly.

FYI, if you are using a canbus and the steering wheel controls go through the canbus, then I believe that you cannot remap the keys.
 
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TorstenH

Senior Member
Feb 20, 2021
423
83
The 12 V from the reverse wire are coming from your car (or in some cases from the canbox if the information gets transmitted from car to the box via canbus).

My suggestion is:
There is a separate reverse connection (usually a brown wire) on the head unit which triggers the radio to open the app which shows the image of the reverse cam.
You could even connect ACC or B+ to the reverse connection for testing purposes.
 

TorstenH

Senior Member
Feb 20, 2021
423
83
It may not be the same for the Navifly, but on my unit, G5 must get the proper voltage to "detect" the car has been put in reverse. I'm re-using my factory rear view camera and it's a 6.5V camera. However, I had to up the voltage to 8.6V so that G5 go that voltage...then the rear image showed up. I reused the car wiring and that's why I had to do this.

Check the voltage that G5 is getting. With a canbus module, I believe there is a wire from the canbus going to G5. If no voltage, make sure the pins are in properly.

FYI, if you are using a canbus and the steering wheel controls go through the canbus, then I believe that you cannot remap the keys.
Absolutely correct.
 

MasK

Senior Member
May 15, 2005
1,266
129
Singapore
www.imraneo.com
Thanks guys, but there is no other brown wire for this.
I have a discussion abt this on this thread too:

My "cam12V" wire is from the HU and it turns on when I am in reverse. Does this mean that this signal might be coming from my canbus? If so, is there another input back to the HU to trigger the screen to display the video feed? Only other wires I see are AMP related :(
 

MasK

Senior Member
May 15, 2005
1,266
129
Singapore
www.imraneo.com
Give 12V to pin 2 and check if the app to display the image of the cam will start:

View attachment 5374441
Yes! It took me a while to figure this out.. mainly because I'll have to cut the wire (wasn't very confident in that)
and also.. the wires at Pin2 didn't make sense! They were more like Battery12V. I did cut and tested that.
So.. it turns out its a pink wire at pin3!

I realized this as I looked at my old Dasaita wires from the canbus connector. Since canbus is a standard, they should be comparable. That reverse wire went into Pin3.
I'm really surprised that Mekede and Navifly has this pin layout printed in all their listings.. but it's just wrong.

Thanks alot for the help!
 

TorstenH

Senior Member
Feb 20, 2021
423
83
That means it works now? I think you had to cut the ACC wire according to the manual because the "ignition on" information is provided by the can box.
 

MasK

Senior Member
May 15, 2005
1,266
129
Singapore
www.imraneo.com
That means it works now? I think you had to cut the ACC wire according to the manual because the "ignition on" information is provided by the can box.
Yes it works now. Check out the images. The Pin2 (red) is probably ACC or batt 12V as there was no power when cut. I then cut the wire opposite it (pin10) in case I was looking at the connector wrongly. That turned out to be the headlight sensor.
After tracing the wire and comparing to my old Daisata, it turns out Pin3 (pink) is the reverse IN.
 

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TorstenH

Senior Member
Feb 20, 2021
423
83
Excellent. Thanks for the clarification.

That means it makes sense to get the wiring diagram from the old radio of the car and compare it with the description of the new head unit.

In my case I had to completely rewire the harness (just if someone is interested):
 

MasK

Senior Member
May 15, 2005
1,266
129
Singapore
www.imraneo.com
The only thing that I could compare to (between old and new HUs) is the canbus connectors. Rest cannot be compared as they're all different.
Oh well..
Anyways, the current Mekede I have has Radio chip NX6686. My old Dasaita PX5 also has a NX6686. However, the radio reception is absolutely trash in the new one. I dont listen to radio that often (I can resort to streaming radio) but my dad takes the car occasionally and he's already complained about it :(

Your experience on the harness rewiring is pretty intense!

Update: Turns out my Antenna connector was a tad loose and I had to do a re-connect. The radio reception is all good now :)
 
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    I got the steering wheel keys to work with a custom controller made by an engineer in my country specifically for my car and my HeadUnit. The controller is connected directly to the wheel controls and the "key" wire on my HeadUnit. I had to disassembly the steering wheel base and route the cable around the original one. Now I can map every key to an action in the Key Learning app. For the backup camera, because I used a wireless kit, I couldn't use the "back" camera wire to trigger the HeadUnit to switch to it. The kit came with a receiver which only had power wires and a yellow RCA cable. I wired the receiver's power cables to the ACC power so that the receiver only powers on when the engine is running and I managed to map a button on the steering wheel to switch to the RCA input. Now when I want to use back up camera, I just need to press a button to see the image. The camera's transmitter is wired to the license plate bulb and I managed to fit it in the rear bumper.
    This wasn't a "plug and play" experience that the Chinese seller promised, but overall I can say I am pretty happy with the end result. The audio quality is wayyy better than the stock HeadUnit. I didn't know that my stock speakers could get that loud and have so much bass. The DSP chip does it's job wonderfully. Also the radio reception is better than with the stock unit. The Android HeadUnit is fast and snappy. Apps open almost instantly and those 6gb of ram really help. I could compare the overall user experience with my OnePlus 7 phone. The unit also cold boots very quickly. The wifi reception is pretty poor. The unit shows 75% signal when my phone is in the car. It doesn't bother me because I put a Sim card in the unit and the mobile reception is as good as on my phone.
    1
    It may not be the same for the Navifly, but on my unit, G5 must get the proper voltage to "detect" the car has been put in reverse. I'm re-using my factory rear view camera and it's a 6.5V camera. However, I had to up the voltage to 8.6V so that G5 go that voltage...then the rear image showed up. I reused the car wiring and that's why I had to do this.

    Check the voltage that G5 is getting. With a canbus module, I believe there is a wire from the canbus going to G5. If no voltage, make sure the pins are in properly.

    FYI, if you are using a canbus and the steering wheel controls go through the canbus, then I believe that you cannot remap the keys.
    1
    Give 12V to pin 2 and check if the app to display the image of the cam will start:

    IMG_20210730_201149.jpg