Hello,

I've installed a aftermarket android radio into my skoda octavia II 2006.

This one to be exact:

Junsun V1

 

The installation went okay my issue is that when I take the key out of the ignition the radio doesn't turn off and drains my battery. I know there is something I have to do with the yellow and red wire within the adapter given from the product but I'm clueless when it comes to electrics, if somebody could explain to me what I have to do/get that would be amazing thank you

Sorry I forgot to mention I'm also trying to figure out exactly what pins do what inside my radio to make sure the adapter is lining up with my car connection 

 

It's all down to the live and switched live being in the wrong locations.

As to which are the correct locations - maybe check on the OEM headunit.

Even when you do get it to switch off (which should be very easy) you will likely find that the battery discharge continues due to the canbus network being kept active by the radio, you will likely need to source and code a later revision can gateway, I had to do that on my 2006 Octavia when I fitted an aftermarket head unit.

 

It is very well documented on this forum, searching through Google is more likely to bring up the threads than the forum search facility.

7 hours ago, john999boy said:

It's all down to the live and switched live being in the wrong locations.

As to which are the correct locations - maybe check on the OEM headunit.

I understand what you mean about the live and switched live cables and that may be the case but I've read in this thread that the Octavia II doesn't have an ignition switch, so that would mean that even if I did switch the wires it would still draw power from my understanding? I apologise, I am clueless when it comes to electrics.

 

6 hours ago, J.R. said:

Even when you do get it to switch off (which should be very easy) you will likely find that the battery discharge continues due to the canbus network being kept active by the radio, you will likely need to source and code a later revision can gateway, I had to do that on my 2006 Octavia when I fitted an aftermarket head unit.

 

It is very well documented on this forum, searching through Google is more likely to bring up the threads than the forum search facility.

Interesting stuff, would it be possible to do this at my home or would I need a professional to code it?

 

 

6 hours ago, J.R. said:

Even when you do get it to switch off (which should be very easy) you will likely find that the battery discharge continues due to the canbus network being kept active by the radio, you will likely need to source and code a later revision can gateway, I had to do that on my 2006 Octavia when I fitted an aftermarket head unit.

 

It is very well documented on this forum, searching through Google is more likely to bring up the threads than the forum search facility.

Also to save myself the hassle of upgrading and coding my can gateway I wonder if I could just do a DIY job on it and cut the main power cable and attach a switch to it and run that to beside my steering wheel and that way I can switch off and on the power.

Wouldn't this fix the whole issue altogether with not only the radio turning on when the ignition is out but also the canbus network draining the battery. Not entirely sure if it is possible but just theorising.

As my recollections were from when I initially had my first Mk2 in 2007, J.R's post did stir up that people's discussions regarding similar circumstances to yours. Hopefully someone who's trod the same path can assist.

1 hour ago, john999boy said:

As my recollections were from when I initially had my first Mk2 in 2007, J.R's post did stir up that people's discussions regarding similar circumstances to yours. Hopefully someone who's trod the same path can assist.

Yeah it seems that certain Canbus models drain the battery with some android head units (from what I understand), the fix for this requires you to check your Canbus model number and cross reference it to a list that was floating around this forum somewhere. Then doing as Jr said about coding the Canbus to your car.

 

Personally trying to find the easiest method as I'm not great with electrical jobs, I figure to bypass this whole thing is to just attach a switch to somewhere along the main power to the radio, run the switch out to somewhere in the car I can flick on and off and that would stop the drain and allow me to turn on the radio separately from the ignition. It would also cut out the Canbus drain since there would be no current at all? That's the theory anyhow. 

It may even make matters work, the can gateway controller sends a message to the radio (the OE one has a canbus node) telling it to shut down & when to wake up, if it does not get the handshake signal or whatever the protocole is, if it cannot find the radio to communicate with it may remain awake.

 

Before faffing around with switches I would disconnect the radio while the ignition is on by removing the connectors then switch off & lock the car, if the battery does not discharge then your scheme will probably work, I bit the bullet and fitted a higher revision can gateway, it will need coding with VCDS or similar, a list of the compatible ones can be found on the Rosstech site.

 

I fitted an aftermarket head unit to my Yeti, whilst it recieves and decodes the door open signals, steering angle etc from the canbus network it does not communicate with it like the OE radio, as a result I get fault codes when I do a VCDS scan of radio controller not found and can network error, I might try recoding it to say that no radio is fitted like I did when i disconnected the OE bluetooth module that no longer has the OE radio to work with, I was scared to thinking it would lose the inputs but after thinking about this reply I think it would work, it could also be an option for you to retain your can gateway.

1 hour ago, J.R. said:

It may even make matters work, the can gateway controller sends a message to the radio (the OE one has a canbus node) telling it to shut down & when to wake up, if it does not get the handshake signal or whatever the protocole is, if it cannot find the radio to communicate with it may remain awake.

 

Before faffing around with switches I would disconnect the radio while the ignition is on by removing the connectors then switch off & lock the car, if the battery does not discharge then your scheme will probably work, I bit the bullet and fitted a higher revision can gateway, it will need coding with VCDS or similar, a list of the compatible ones can be found on the Rosstech site.

 

I fitted an aftermarket head unit to my Yeti, whilst it recieves and decodes the door open signals, steering angle etc from the canbus network it does not communicate with it like the OE radio, as a result I get fault codes when I do a VCDS scan of radio controller not found and can network error, I might try recoding it to say that no radio is fitted like I did when i disconnected the OE bluetooth module that no longer has the OE radio to work with, I was scared to thinking it would lose the inputs but after thinking about this reply I think it would work, it could also be an option for you to retain your can gateway.

Thanks for your reply, I will disconnect the car radio and test it out to see if the battery goes flat, how long do you think I should wait for to make sure its not effecting the battery? 

If it starts without any slower cranking after 24 hours you can be reasonably sure that it is OK.

6 hours ago, J.R. said:

If it starts without any slower cranking after 24 hours you can be reasonably sure that it is OK.

Okay I will test it out and if everything goes well I will try adding an external switch and update with the finished product, thank you very much for your help 🙂

Hello, so can update to this post, I have added a switch to the power cable of the radio, now I am in the testing phase into making sure anything that I have done is draining the battery in some form or another.

Here is a YouTube video showing the set up.

Update: Battery wasn't drained over night, going to call this a success 😀

Does the stereo support canbus?

 

I also got a Junsun and it's shows the climate info on the screen and which door is open etc.

 

I had to disconnect two wires on the back of mine to stop it staying on and use the canbus signals instead.

1 hour ago, Phil-E said:

Does the stereo support canbus?

 

I also got a Junsun and it's shows the climate info on the screen and which door is open etc.

 

I had to disconnect two wires on the back of mine to stop it staying on and use the canbus signals instead.

The two wires you disconnected, the red and orange I believe, I also disconnected them and that didn't seem to work for me, it cut power completely from the radio, I had to attach to switch to the red wire which was the power one. 

 

As for the can us I'm not entirely sure, what app do you use on the radio to test the canbus. I know there was a black box that came with it that you plugged in and I believe this was something related to the canbus (perhaps preprogrammed if those exist?) however the pin that it was connected to was always hot and instead of testing it I just decided to disconnect it altogether as my purpose for the radio is only music, navigation, videos etc. 

 

Not entirely sure as a whole but if it were the case that the black box was related to the canbus you could do the same thing I did with a multiple wire terminal blocks instead of single wire terminal blocks. 

If it shows things like doors/bonnet/boot open, trajectory lines for a reversing camera, if it has speed sensitive volume etc then it is decoding the vehicles canbus signals.

 

The world used to turn around and things functioned before apps, & they still do without them.

23 minutes ago, J.R. said:

If it shows things like doors/bonnet/boot open, trajectory lines for a reversing camera, if it has speed sensitive volume etc then it is decoding the vehicles canbus signals.

 

The world used to turn around and things functioned before apps, & they still do without them.

Haven't seen anything like that and at the moment the reverse camera isn't set up to the power. I will test it when I'm home but I believe I left it disconnected in fear of it draining my battery

On 08/06/2022 at 17:11, Phil-E said:

Does the stereo support canbus?

 

I also got a Junsun and it's shows the climate info on the screen and which door is open etc.

 

I had to disconnect two wires on the back of mine to stop it staying on and use the canbus signals instead.

So I installed a reverse camera up to the radio, I plugged into the radio this black small box, I did looked it up - it seems to be some form of Canbox so im assuming the radio is getting information from this. Now I'm not sure why (as im convinced i originally has this plugged in when i originally had the battery draining issue) but after putting this in and the gps everything just worked, the radio knew what my car was doing (Turns off and on with ignition, backlight turns on when i put my lights on)