Hi
I'm hoping you can help, I don't have much hair left to pull out!
I have an Audi TT 2003 and bought a VW Passat android 4.4 head unit.
The head unit uses canbus system to turn on
I connected the stereo to check operation and everything seemed fine.
After fitting (which took an age) discovered that stereo turns off after ten mins. I have to remove key, open and close the door then put key back in then stereo powers up again for ten mins. If I remove the key before ten mins and get out, stereo powers down.
Any ideas?
Peterbrid said:
Hi
I'm hoping you can help, I don't have much hair left to pull out!
I have an Audi TT 2003 and bought a VW Passat android 4.4 head unit.
The head unit uses canbus system to turn on
I connected the stereo to check operation and everything seemed fine.
After fitting (which took an age) discovered that stereo turns off after ten mins. I have to remove key, open and close the door then put key back in then stereo powers up again for ten mins. If I remove the key before ten mins and get out, stereo powers down.
Any ideas?
Click to expand...
Click to collapse
Maybe the canbus decoder from Passat it's not compatible with the Audi TT, but you can cut red wire from canbus decoder and connect directly to acc signal (12v when switch is in ACC and ON position)
All other function from canbus decoder are fine? (lights, reverse, door info, a/c info, etc)
Thanks for the reply.
There is no external canbus decoder. The canbus wires connect directly to the head unit so it must be an internal decoder.
I was thinking there may be a difference between canbus systems. They are both VAG group systems but two years different, car 2003 head unit for a 2005. Was canbus updated in this period? This is the nuclear option as it means I'll have to rip it out and start again (I have tried a canbus unit with external decoder just to see what happens-same thing just comes on for ten mins)
However, there has to be some communication as HU turns on with signal from canbus and will turn off if u remove the key (before ten mins). Also the other functions work, fuel guage etc
Peterbrid said:
Thanks for the reply.
There is no external canbus decoder. The canbus wires connect directly to the head unit so it must be an internal decoder.
I was thinking there may be a difference between canbus systems. They are both VAG group systems but two years different, car 2003 head unit for a 2005. Was canbus updated in this period? This is the nuclear option as it means I'll have to rip it out and start again (I have tried a canbus unit with external decoder just to see what happens-same thing just comes on for ten mins)
However, there has to be some communication as HU turns on with signal from canbus and will turn off if u remove the key (before ten mins). Also the other functions work, fuel guage etc
Click to expand...
Click to collapse
That's a trouble, do you open head unit to see how is inside? Maybe you can made the mod internally.
Thank you for the reply
That's what I was thinking, but I'm a little bit worried about opening it up. I don't have much experience with pcbs.
So my questions are:-
1) If I open up the canbus bypass box (from another stereo) will the pcb inside be broadly similar to the one inside the HU, giving me a rough plan as to what to look for re:- wiring and live etc
2) the switched live from a canbus bypass box 12v (as previous post said can just bypass with a switched live), is it likely to be same inside HU or will it be stepped down to 5v (should I just buy a multimeter)
Peterbrid said:
Thank you for the reply
That's what I was thinking, but I'm a little bit worried about opening it up. I don't have much experience with pcbs.
So my questions are:-
1) If I open up the canbus bypass box (from another stereo) will the pcb inside be broadly similar to the one inside the HU, giving me a rough plan as to what to look for re:- wiring and live etc
2) the switched live from a canbus bypass box 12v (as previous post said can just bypass with a switched live), is it likely to be same inside HU or will it be stepped down to 5v (should I just buy a multimeter)
Click to expand...
Click to collapse
1.- I have not idea, I never see inside of a unit with internal canbus decoder. You can open your unit and take some pictures maybe I can help you, also take pictures of the main harness of your unit.
2.- For a external canbus units just cut red wire from canbus decoder to head unit and connect the red wire from the side of head unit to 12v switched.
I will post some pics
And thanks again for the help
I have a 2007 VW Golf with the factory fitted amplifier under the seat. How do I make this work with my Joying head unit? I see the orange AMP wire coming out the back of the unit but I don't know what to connect it to...
SOLUTION
You need to provide power to the AMP-CONT orange wire, this can be done by plugging it into the empty hole next to the blue wire going into the CANBUS box, then Amp option in Device>Sound is set to On.
Hi professionals. Thanks for reading my plea for help. I have a 2005 SLK 200 R171. I recently decided to change my player from the usual audio 20 with cd changer to this Erisin Android PX5 head unit i got off aliexpress. When i received it, i noticed that the harness supplied with the player did not fit my car. Hence i opted to buy a Dynavin harness which by pictures the harness fitted my original plug but the cable attaching to my headunit did not. So i did my rewiring myself. Followed the usual colour and power and got the headunit powered up. However i noticed the can bus is fed with one constant wire, one ground wire, and both the can high and can low cables from the car. And there are 3 cables that goes from the canbus unit to the headunit i.e. brown for reverse, red for acc, orange for illumination. I have 2 more wires with a small harness (White and white/black stripe wire) that does not have an input to anywhere (I believe that Is the canbus high and low to the headunit) and a blue wire. On my headunit harness, according to the wiring diagram attached with the player, there is only one wire going to the can low socket and the can high is empty. Hence i attached my can low from the headunit to a blue wire from the canbus and noticed my steering wheel controls work (volume buttons and +/- track). However, the display on my dash says audio off. Also my rear view camera goes on and off (I looped the trigger wire to the reverse brown wire that exits the canbus and goes to the headunit reverse). I will try an attach a video. Does anyone know if i have made a mistake in the wiring? And does anyone have a wiring diagram for the can bus decoder (brown semi transparent box)?
Any help is very very much appreciated. Thanks tonnes.
My issue link
vimeo dot com slash 462084336
( sorry wasnt allowed to post a link)
Hello Haven,
Did you ever receive an answer? I am having a similar issue. I bought an android head unit with can bus decoder. Almost all the wiring harnesses were wrong and I had to rewire myself. the chinese supplier did not provide any wiring diagrams or pinouts, (claims they do not have any). I finally got my reverse camera, sound, and steering wheel controls working. (all come directly into head unit. The can bus decoder does not seem to be connected to the can H and Can L from the vehicle. I have the same 3 wires from can bus decoder box to android head unit. I am certain based on the other wire harnesses received that the wiring from car to can bus decoder is wrong. Can you tell me what two pins the Can H and Can L are fed to on your decoder box?
Hi All,
I have a 2013 Kia Sportage Platinum.
I have purchased the following items to install an aftermarket headunit to gain Android auto;
aerpro-apa47
AERPRO-CHKI14C
AERPRO-APP9PIO8
aerpro-fp8011
AERPRO-APRTK2
PIONEER-SPH-DA360DAB
Attempted install and found that the steering wheel controls won't work and there is no sound coming from speakers.
I've triple checked all connections and I believe I have everything plugged in correctly.
The CHKI14C I am assuming is the issue. Have I purchased the wrong item for my car?
Or have I missed something?
There is a blue/white wire that is not connected from the AERPRO-CHKI14C. States amp remote wire but not sure if I need to splice it in somewhere.
Thank you.
I have attached the manuals for the factory headunit (lan8900 - has optional 24pin TYCO AMP and therefore no connector B within the 26pin power connector) and for the AERPRO-CHKI14C (CTSKI009.2).
Hello,
some days ago i did a terrible mistake and i joined the can-rx cable(which connects the canbus decoder with the head-unit) with the swc controls cable (from the head-unit side, NOT from the car side.) After that the head-unit never powers off. It stays always on and also all the canbus commands dont work at all, like the ILL command or the reverse camera mode which was automatic.
In ford mondeo there are no ILL or ACC cables coming to the ford quadlock connector.The reverse camera image activates though canbus command as the reverse activation cable connects to the canbus decoder. All these commands come through canbus communications.
So my assumption is that either i made damage to the head-unit can-rx input or to the canbus decoder.
I have noticed three things:
1) All the head-unit functions including flashing the mcu and flashing the system-rom work ok! I read that can-rx and can-tx connect directly to the mcu so with no fried mcu on the head-unit i think that the damaged canbus scenario is more possible.
2)The canbus decoder outputs constanlty 12-14 volts on ACC cable even when the car ignition is off. That is why the head-unit never powers off. Also when i enable the headlights the ILL cable has 0 volts which is sadly expected as the ILL (dimmind of the screen and leds illumination on the head-unit) does not work.
I also gave 12 volts from my power supply to the canbus decoder with nothing connected on it and i checked the ACC cable with multimeter. The voltage was 12 volts as with my previous tests at the car where everything were connected together.
3)And one last thing i want to mention is that after all these i checked with my original sony radio that came with the car and everything is working fine including ACC and ILL so for sure there is no damage to the car side.
So i want your knowledge please.
Do you think that is it a faulty canbus decoder? Is it normal for the ACC pin on the canbus decoder to be 12 volts when there is nothing connected to it?
Does the canbus send commands to the canbus decoder through CanH and CanL for the ACC pin to be 0 volts so that is why it is always 12 volts in the first place when disconnected from the head-unit?
And if the ACC should be 0 volts where should i check for damage on the canbus decoder? Because i checked the capacitors and all seem ok. Also i cant find any obvious short on the circuit. Maybe it is the Nation N32L406 that got damaged?
Thanks in advance!