Hello guys,

After searching and readinglot of sources (here and there and bla bla...)
bought an Android unit from china with all other extra items, such back up reverse cam, dascam, OBD2Blutooth. There are a few harnesses available for my installation but all of them really really horibble and makes my work and effort almost triple more sophisticated. Color codes, wiring tables and connector pinout diagrams for my vehicle are not available (I have an European version Accord CU2, AKA Acura TSX Sport Wagon in USA) Like i said my Premium Audio system has a very foking absurd connections and wiring by factory OEM. So i have to figure it out which connections leads to where. Mostly done but some of them just leaved behind useless...

So most dificult for me is that wiring and harness part. Almost done btw.

Here is the list with links that i choose for my new system:

Joying Android 2DIN Universal Quad Core
Harness with CanBus interface (Canbus is extra $20)
OBD2 to Bluetooth adapter
Wireless Camera OEM Replacement
...and Wired reverse cam, cos wireless wont work!!
2DIN installation fascia frame

Like $500 for all of those parts.
I am now not done with my installation, there is an issue. It is really annoying me. After installing my new system faced a few major problems:

Included and well damn payed CanBus interface is useless.
Unfortunately first reverse cam i bought wont work what ever i tried. So has to buy 2nd one and this time an universal wired cam, which is well working but ugly and difficult to install. Damn did not buy that one and regreat..Look:OEM Style wired reverse cam

I am now facing with a nightmare, whatever i am trying, comes no sound out speakers on the back doors inc. subwoofer (trunk). I have a premium system, so this is 7+1 (right? ) sound system. With my OEM setup was really nice sound overall in the car. Now only front 5 speakers. 2 on the doors+ 2 tweaters+1 center middle on the front of dashboard. So 2 on the back doors and subwoofer are silence.

What could be the reason? I really dont wanna go to a specialist cos here where i am living (Netherland) they are asking lot of money for this kind of work. Like $200~250

GPS on android device tested by me and working. Not properly, because it is a cracked version from Chinees supplier and Traffic Jam info is not working, getting "Could not connect to the server" error if i try. Also map update gives same error. So no live updates. It came with 2015 world maps.

7" screen is a bit small actually but looks nice. But design of the screen not very nive. All of the edges are hard to touh because the bezel rounding the LCD touchscreen is annoyingly high and makes difficult to touch edges and corners.

Music is a bit poor quality but i think this is caused by also cheap Chinees material on the motherboard. Like conductors, chipsets, connections, isolation etc. on the motherboard.

Microphone is tested and surprisingly good.

Back-up cam (wired) works nice also poor quality and not 720p!! like seller told..
USB 720p Dashcam works also fine but poor quality too. That one is solded also as720p but i think it is 480 or 360p, but the software that used by cam itself makes it (upscaling) 720p.

Bluutooth and pairing with (my android) mobile phone working also surprisingly good and very simple. It takes over your phonebook and contacts, also agenda, music traks, photos, videos and ofcourse phone calls.A bit disappointed and missing an option like voice command and call option. With a voice command would be perfect!

Screen mirroring OK
OBD2 bluetooth not tested yet but i dint expect any prbolemswith that.

So far is a very good system for NonNav cars. If you want an upgrade by dealer it cost probably like $1200. What i have, is much more cheaper and gives more freedom. Freedom of android. Witha Hotspot mobilephone in the car you have always internet. Which means you keep your connection on the car wth android system and keep watching youtube or TV, radio services or can use thousands of apps.. Many possibilities.. I like it.

So every help is appriciated about my audio issue.

I have now audio from all front speakers (5 speakers) but no sound on back doors and subwoofer! Why?

Also necessary to know:

The sound that i got from android player also non listenable if you put it a bit harder. Volume level up to the half is still clear but above that being very annoying.

An update:
Bluetooth OBDII adapter also not working with my car but could be with another model car
Audio issue still unsolved but had no time to researching that so far
Back-up cam and Dash DVR cam working still nice
Joying released some new frimware upgrades available and gonna try that too
I am now able to use original AUX and USB input (under the restarm) with Joying android but you need some extra products which are available for a stupid low price on aliexpress
Internet (wifi from hotspot) via my gsm works like charm too.

The Joying headunit will only connect to obd Bluetooth adapters with the device name "OBD". However, with a root and some software this can be changed. It's on the wiki.
http://forum.xda-developers.com/wiki/Hui_Fei_Type

Audio problem is solved. Thnx for your reply too Username 0
I will try it later.
Sound problem was the harness. A wire connected not properly after relocating the wire to the right pin have now sound from all speakers inc. subwoofer but overall sound is still stupidly low and cannot listen it above level. Above this level it's getting kind a ugly humming noise.

I think original amplifier is not working with Joying.

Well I don't think these headunits have subwoofer volume control. We should ask them to add it. The factory amp is ok, just need more control from headunit.

Yes,
It has a subwoofer volume control and this control option is available under de main settings interface. But i think it is mented to centering / fading the sound in the car. Under the subwoofer control settings i can adjust the sound direction to the speakers. Not specifiek for the subwoofer. There is also a Subwoofer output on the back of android headunit. It is a RCA output. But i am using only supplied harness and that one is plugged directly to the 20 pin output on the rightside with fuse+antenne+GPS+mic and 2xUSB. My RCA outputs are still free and not in use.





Joying Android back outputs

I'm in the same shoe. Euro Accord Premium Sound System with 6changer. The main problem that the amplifier need digital control from the headunit. (Fader, balance, levels etc.) You cannot wire it correctly with aftermarket headunit which not prepared for it. I found only barand headunit for the Australian market which can control the factory amp, but cost around 1500USD, and the import would be also impossible. So I decided to replace completely the factory amplifier.

The joying harness is containing only amplified speaker level outputs, I guess you're driving the amplifier with this (3-20V) instead of line level (0-2V theoretically, but there are some toleration in the car amplifiers, they usually accept level 0-6V). When you raise the volume the amplifier gets too high voltage for input and that causes the humming sound. There are devices available which can convert speaker level to line level, but the line level already exist in the RCA outs on your headunit, you should wire it to the amplifier. It requires some electronic skills, and you still won't be able to adjust the Center/Subwoofer level separately.

Sorry but the factory amp is not ok. It's actually garbage and should be replaced so that fancy Android HU can do what it's supposed to. It's like putting Pinto wheels on a Porche.

Factory amplifier is easy to find. If someone need it i can show the right place with some photo's. I have allready removed it. MNow i have a JBL GTO5355 5 ch amp and wanna install it.

It is true, confirmed by my local Honda garage/dealer. Original factory amp is only working with original head unit. Because it receives at least 2 data signals to process sound then send the sound (cross over) to all speakers and subwoofer. There is no way to get it work with an Aftermarket radio unit.

It is an actually piece of shit that original amp. Very small and 4ohm at 2 ch. Unbeliavable how it works with 10 speakers... And i still think my original head unit has a good quality sound... At least it was good enough for me.

From what I understand, the OEM HU does all the processing and EQ'ing on those unlike the base where it is the opposite. It's all or nothing on those so it looks like you have gone all in!! What about speakers? Are you replacing those or staying factory?

Try to follow my other post. Aftermarket android installation