Anyone that have the headlight connector pin functions/spec ?  Need to find out what pin is CAN-H and CAN-L that will be monitored by the highbeam control module I'm going to add (installing a LED light bar to make the really bad original high beam light a little bit better).

 

Searched on the Internet and have found Workshop manuals of almost everything but not wiring diagram of the headlights.

 

I have Bi-xenon with Headlight assist, MY 2019.

Thanks in advance

Edited 13 November, 20223 yr by Ingper

This is not a good way about doing it. 

 

If I was you I would make use of an unused Leuchte channel in the body control module. That way you can decide when you want it to come on and certain settings, you could make it come on during high beam but also during fog lights for example.

 

A leuchte channel set up correctly can switch a relay to control your light bar.

 

 

Out of interest, why did you want the canbus wires to control a light bar? Do you have some kind of aftermarket canbus controller or something?

Edited 13 November, 20223 yr by ApertureS

25 minutes ago, ApertureS said:

This is not a good way about doing it. 

In opposite I think it's a very good way 😉.

Especially because now I have no time to modify the Body Control module connector, route wires to engine room etc. If it was few months ago - yes, then it would have been an alternative (and of course - cheaper).

And it will only be used together with Highbeam, because I really need better highbeam to light up on the dark road and surrounding (to see animals etc). The original Superb III Bi-xenon highbeam is quite bad. Why would anyone use such LED bar together with fog lights ?

 

Since a few years there are some aftermarket OEM modules that have correct implementation also when using Highbeam Assist. I.e. they switch the output off as soon as ANY part of the original light needs to be masked. For example https://modernum.se/produkter/extraljuskablage/digital-lightning/  (sorry for the swedish in the link).

 

But to prepare the installation I need to know the CAN bus pin numbers in headlight connector.

Anyone ?

19 minutes ago, Ingper said:

In opposite I think it's a very good way 😉.

Especially because now I have no time to modify the Body Control module connector, route wires to engine room etc. If it was few months ago - yes, then it would have been an alternative (and of course - cheaper).

And it will only be used together with Highbeam, because I really need better highbeam to light up on the dark road and surrounding (to see animals etc). The original Superb III Bi-xenon highbeam is quite bad. Why would anyone use such LED bar together with fog lights ?

 

Since a few years there are some aftermarket OEM modules that have correct implementation also when using Highbeam Assist. I.e. they switch the output off as soon as ANY part of the original light needs to be masked. For example https://modernum.se/produkter/extraljuskablage/digital-lightning/  (sorry for the swedish in the link).

 

But to prepare the installation I need to know the CAN bus pin numbers in headlight connector.

Anyone ?

Looking at a MK3 with bixenons (MAY NOT BE CORRECT FOR YOUR CAR) from may 2018 onwards it is Orange/Brown Pin 2 for Can Low, Orange/Red Pin 1 for Can High. But again, it still seems massively pointless to purchase a device that has exactly what the car already has built in. In the time it takes to splice into the canbus and make the wires correctly water tight you could of ran a single wire through the bulkhead to the BCM. 

 

Also take note the wires on this circuit for canbus are NOT the vehicles canbus networks but instead are a 3 module network comprising of MX1 left headlight, MX2 right headlight and 4B Module/J745.

 

The suggestion of a light bar with fogs was just a suggestion, you could make it come on through any number of things and go off for any number of things also. 

What I understand the optional I/O pin positions on the BCM socket are not populated in the harness connector, i.e. they also need to be added.

But I got your point.

 

Thanks for your answer.. I'll double check the harness and pin numbers anyway. But now I have something to start with 😉.

 

 

7 minutes ago, Ingper said:

What I understand the optional I/O pin positions on the BCM socket are not populated in the harness connector

This is correct, but very very easy to do. 

Pull the required BCM connector, Normally C - then with a '000 979 009 E or 000 979 026 E' pin you just add it in the correct slot, run it under the dashboard and straight out into the engine bay. 

Hmmm,....

If we discuss a little bit more I'm afraid that you'll convince me to use the BCM instead....🤔

 

Btw I think some configuration may also be needed (remember this from another thread) ?  But I have VCDS so that would be a minor issue.

2 hours ago, Ingper said:

Hmmm,....

If we discuss a little bit more I'm afraid that you'll convince me to use the BCM instead....🤔

 

Btw I think some configuration may also be needed (remember this from another thread) ?  But I have VCDS so that would be a minor issue.

Its very simple and i can even send you pdf that is a case study on Leuchte channels. 

 

Basically find the free channel, connect the pin, set Lasttyp to general, set a bit and byte, set AB to highbeam and dimmwert to 127 and away you go...

Especially when it looks like that module is about 250Euros....! ouch 

4 hours ago, Ingper said:

because I really need better highbeam to light up on the dark road and surrounding (to see animals etc). The original Superb III Bi-xenon highbeam is quite bad. 

 

Not a helpful comment for this discussion - but the high beams in my Superb r brilliant.

They light up far and the low beams cover the width nicely.

I did change the factory xenon bulbs to the Phillips XtremeVision Gen2 though.

 

Good luck with hooking up ur LED light bar.

16 hours ago, ApertureS said:

Also take note the wires on this circuit for canbus are NOT the vehicles canbus networks but instead are a 3 module network comprising of MX1 left headlight, MX2 right headlight and 4B Module/J745.

 

^^ is the important thing to note...

 

The headlights are on the AFS CAN-bus which is only for headlight aim/levelling - there will be no CAN messages about high beam status.

 

There are multiple (4+?) different CAN-bus networks in your car so you need to check which the CAN-bus the module is designed to be connected to and then find a suitable splice point.

you don't need to do this, there's the bulb for the eyebrows. My Linear 18 is spliced directly in. Can show if needed.

 

And yes, the standard high beam is on the borderline of "OK", it's not "good" by any stretch. 

 

did you already log in to erWin to check for the wiring diagram?

Edited 14 November, 20223 yr by brettikivi

5 hours ago, brettikivi said:

you don't need to do this, there's the bulb for the eyebrows. My Linear 18 is spliced directly in. Can show if needed.

 

And yes, the standard high beam is on the borderline of "OK", it's not "good" by any stretch. 

 

did you already log in to erWin to check for the wiring diagram?

Not all headlamps have the eyebrows, only SLA headlamps have them

2 hours ago, ApertureS said:

Not all headlamps have the eyebrows, only SLA headlamps have them

 

+1

Also, the eyebrows use LED lamps, not bulbs.

 

Thanks for all input. I hate threads without a final summary, so here comes a report. Although the colour on CAN wires mentioned above didn't match, the pin numbers did (thanks). I also found out that the numbers seemed to be the same on other VAG cars built on the same platform.

 

On 13/11/2022 at 18:09, ApertureS said:

Also take note the wires on this circuit for canbus are NOT the vehicles canbus networks but instead are a 3 module network comprising of MX1 left headlight, MX2 right headlight and 4B Module/J745

I was aware of this, but because it was the commands to the headlight that would be used/monitored, I was convinced these messages were present on this headlight CAN bus 😉

 

On 14/11/2022 at 10:16, langers2k said:

The headlights are on the AFS CAN-bus which is only for headlight aim/levelling - there will be no CAN messages about high beam status.

That is not correct. It also includes information/messages to the headlight about what area to mask/dim (when "high beam assist" is in use) and if "full high beam" (i.e. not restricted at all) is the case. The information is used by the OEM controller - "if full high beam/no restrictions, activate the output".

 

I didn't pay close to €250 for the unit, bought it second hand and reloaded with the SW for my specific vehicle. Also didn't cut the CAN wires, only unisolated them to make it possible to solder the OEM controller CAN wires in parallel. The modification was done to the harness a little bit away from the headlight connector (and on the right side, more space on my left-drive car) to make it more robust and no additional wires to take care of when headlight connector is disconnected/connected.

 

The LED bar I used has indirect optics/reflectors that focus all light in an oval shape. That's why there's no "extremely white spot" just in front of the car, that use to be seen with some cheaper LED bars. It was possible to get everything in place without removing the front, but I had to move the outdoor temp sensor to a new location (interfered with one end of the light bar).

Link (only in Swedish, use Google Translate): https://ljusgiganten.se/supervision-fusion-600-x.html

 

The result ? Works perfect ! High beam light is now quite ok. Not 100% perfect, mostly limited by the low location. But there are almost no other alternatives because of front parking sensors, radar etc.

Edited 15 November, 20223 yr by Ingper

Looks like a very clean install.

 

Only thing i would add to it which is just an opinion and very picky is to replace the hardware/bolts with black ones so it blends in better  

2 minutes ago, ApertureS said:

Looks like a very clean install.

Only thing i would add to it which is just an opinion and very picky is to replace the hardware/bolts with black ones so it blends in better

Thanks.

 

Yes, it's a good point !

The problem is that I want them in stainless steel, everything else will become rusty when driving on Swedish winter roads (sooner or later). But black finish stainless is not easy to find.

May have some plans to hand paint them black in the future....

Paint them with some black nail varnish?