Head unit wiring chaos!

[Sorin]

Hi all, I am writing to ask for your help about the wiring for the head unit. I have a 2012 Vellfire 2.4 petrol. When I bought it, the head unit was already replaced with an Android. When I wanted to change it with a better android, at the back I found a total chaos in the wiring, as you can see in the pictures. My car has only 1 speaker in each door, so 4 in total, plus 2 small Pioneer fitted on the A pillars. From all those wires I noticed that the ones for the Steering Controls are missing and I don't know from where to bring them to the head unit.  I also have a grey connector with 4 wires that I don't know what is for, but I suspect that is for the rear camera. It doesn't connect to my head unit, but my rear camera works!

Please help if you can!

[Geralt]

Looks like it could be this pin out:

 

[Geralt]

11 hours ago, Sorin said:

From all those wires I noticed that the ones for the Steering Controls are missing

Did the SWC work with the old unit?

[Sorin]

2 minutes ago, Geralt said:

Did the SWC work with the old unit?

Hi Geralt, thank you for your help. In the 16 pin connector I have the 2 SW wires, but are connected to nothing. This is why I want to find where these wires are coming from and connect them. I bought the car with an Android and the SW buttons were not working. You can see the SW wires in the pic.

[Geralt]

Hi Sorin,

 

11 hours ago, Sorin said:

I have the 2 SW wires, but are connected to nothing

 

The two 2SW wires you mention, can you confirm which pin numbers they go to and what their colours are? The photo is not clear enough for me.

[Sorin]

1 hour ago, Geralt said:

Hi Sorin,

 

 

The two 2SW wires you mention, can you confirm which pin numbers they go to and what their colours are? The photo is not clear enough for me.

In the previous photo, the 2 SWC are the short ones pointing up, a brown and a brown+white. They are positioned on the 16 pin connector as in the pic attached, pin 6 and 7.

Edited March 15 by Sorin

[Geralt]

So they are pins 6 and 7? Just making sure.

[Sorin]

6 minutes ago, Geralt said:

So they are pins 6 and 7? Just making sure.

Yes. Also, when you are reversing, are your guide lines moving in corelation with your steering wheel moves? I mean, if you are turning the steering wheel to the left, are your guide line moving to the left too?

[Geralt]

The guidelines issue would not be fixed by connecting 6 and 7. The KEY inputs (6 and 7) only connect the SWC buttons, volume etc. It is not for steering wheel position as far as I know which is most likely transmitted over CAN. Is connector C in use?

I will update about 6 and 7 later.

[Geralt]

I don't have any guidelines on my HU camera.

[Geralt]

Sorry, that's garbage. I do have guidelines but they don't move for reasons mentioned above. My older van doesn't have CAN anyway.

[Sorin]

Connector C is not in use, the 2 Can wires. I do plan to connect them, I have to think at a way to plug in to the Can lines.

[Sorin]

2 hours ago, Geralt said:

Sorry, that's garbage. I do have guidelines but they don't move for reasons mentioned above. My older van doesn't have CAN anyway.

All the cars have Can comms. I am pretty sure that there is a way to get them to talk over the Can protocol.

[Geralt]

14 minutes ago, Sorin said:

All the cars have Can comms

No, they don't. The early Gen 1 Alphard doesn't. Your 2012 van does of course.

[Geralt]

I tried lookin for Gen 2 wiring diagrams but could not find them. I can only advise what I found out for my Gen 1 in the hope that it might be the same/similar on yours.

 

The SWC button resistor ladder is connected like this:

 

Where for you SWC1 = KEY-1 etc.....probably.

 

So I would look for Yellow/Black, Brown/Yellow and Red/Yellow wires coming from the right hand side of the centre console.

 

The J10 connector looked like this:

 

If you can get the wiring diagrams, you can identify the wire colours.

 

 

[Geralt]

I'm not so sure now. @Voodoo101 thinks that volume etc comes over CAN.

I don't think I'm helping here so think I'll bail. You need to find someone with Gen 2 experience. Sorry.

[Sorin]

33 minutes ago, Geralt said:

I'm not so sure now. @Voodoo101 thinks that volume etc comes over CAN.

I don't think I'm helping here so think I'll bail. You need to find someone with Gen 2 experience. Sorry.

Don't worry, thank you so much for your help. Maybe @Chris.ac can step in and advise? 

[Chris.ac]

Sorin, the lowest spec audio system has 8 speakers.

2 corners near windscreen.

2 drivers doors

2 sliding doors

2 rear seat sides

 

I assume you only have buttons on the left side of steering wheel?

 

Try here. Full diagram.

 

https://kolhosniki.ru/td/td3ewd/pgm/standaloneEWD.php?pubNo=EM2441;ewd_type=intro;ewd=INTRO01;term=201209;vwlang=en;ewdpath=/td3ewd

 

[Sorin]

7 hours ago, Chris.ac said:

Sorin, the lowest spec audio system has 8 speakers.

2 corners near windscreen.

2 drivers doors

2 sliding doors

2 rear seat sides

 

I assume you only have buttons on the left side of steering wheel?

 

Try here. Full diagram.

 

https://kolhosniki.ru/td/td3ewd/pgm/standaloneEWD.php?pubNo=EM2441;ewd_type=intro;ewd=INTRO01;term=201209;vwlang=en;ewdpath=/td3ewd

 

Thank you Chris, I am looking at it now!

[Sorin]

On 3/14/2024 at 8:00 PM, Geralt said:

Looks like it could be this pin out:

 

Hi Geralt, what are pin 2 and 4?

[Geralt]

2 is ILLumination DETection. i.e. This input triggers the illumination of your head unit when you've switched on your vehicle lights.

 

Not 100% sure but 4 is an output to an active antenna amplifier.

 

Just checking. The XTRONS label you posted is the new HU you're installing, right? When you asked the question originally, I thought you didn't have the pin out information but since you do you can just ignore my picture.

 

Edited March 17 by Geralt

[Sorin]

31 minutes ago, Geralt said:

2 is ILLumination DETection. i.e. This input triggers the illumination of your head unit when you've switched on your vehicle lights.

 

Not 100% sure but 4 is an output to an active antenna amplifier.

 

Just checking. The XTRONS label you posted is the new HU you're installing, right? When you asked the question originally, I thought you didn't have the pin out information but since you do you can just ignore my picture.

 

Yes, the Xtrons is the new one. I have similar pins on the new HU and I was wondering what are these for. Also, on the old android, I have a RCA labeled video out, and the roof monitor is mirroring the main HU. I cannot find a similar one on the Xtrons, although manual mentions about this function ( but not how to connect the devices). Can you see a potential video out on the Xtrons pin out?

[Chris.ac]

Antenna power is a hang over from the 80s/90s.

It's basically a head unit powered output, it used to be used on electric extending antennas,  or as a power on signal for an external amp.

Basically equipment you wanted switched on, when the headunit was switched on.

[Geralt]

On 3/17/2024 at 7:32 PM, Sorin said:

Yes, the Xtrons is the new one. I have similar pins on the new HU and I was wondering what are these for. Also, on the old android, I have a RCA labeled video out, and the roof monitor is mirroring the main HU. I cannot find a similar one on the Xtrons, although manual mentions about this function ( but not how to connect the devices). Can you see a potential video out on the Xtrons pin out?

There doesn't seem to be any video out on the label. Can you tell me the XTRONS model so I can find the manual?

[Sorin]

30 minutes ago, Geralt said:

There doesn't seem to be any video out on the label. Can you tell me the XTRONS model so I can find the manual?

Hi Gerald, thank you for yor help. I managed to find the wires for the steering wheel controls,  this is the last one with the head unit. The unit is a TIE124. I searched in the manual that was in the box and it is not mentioned.