Avant Facelift LED Taillight howto

[Smac770]

The tool has to be at the car. Someone could remote into the laptop running VCDS and control VCDS remotely. But the cable, the program, the laptop, that's all going to have to be a the car. This is how remote services for component protection and such work; you get a cable and a laptop, let them remote in, they set up the software and run it to change the car. With something like OBDeleven, you can't really let someone do it for you. But the coding is easy, a lot easier than doing rewiring. If you don't own VCDS or OBDeleven or such, my normal response would be "why not, you own an Audi".

The numbers on the plugs will need good light to see. You can see them for example in the pics for this 32-pin gray: https://www.ecstuning.com/b-genuine-...ay/1j0972977g/ But I'm also opening them on a 34" monitor, not an iphone mini or such.

[1inchwarrior]

Morning all.
I’ve recently acquired a 59 plate Audi A4 B8 Avant with pre f/l led rear lights.

I have bought facelift LED rear lights off eBay (think they are off a 2015 plate)

I bought this Harness off ebay.
https://www.ebay.co.uk/itm/266708432...mis&media=COPY


Connected it up and the indicators work as normal both sides but the rear tail (DLR bar) and brake lights are the opposite.

I have identified each channel by changing the code to each channel one by one to the value of 44. It would then illuminate when I initiated the indicator.

Having had a play with the channels (I may be wrong) I believe that mine align like this below. The codes shown are the B8 ones which I haven’t altered yet.


Channel. Function Code
195 Brake Left Inner 5251
196 Brake Left outer 5283
197 Brake right inner 5124
198 Brake Right outer 5156
199 DRL left inner 133
200 DRL Left outer 165
201 Left indicator 12
202 Right Indicator 44
203 Rear fog left 73
204 Rear fog right 105
205 Reverse left 13
206 Reverse Right 45
207 DRL right inner 5
208 DRL right outer 37

I just need to know what codes should go with those functions to make the lights operate as intended.

Is it just a case of swapping the codes around or do they require different codes completely as they are differently light units?

I’ve read thorough numerous threads on various forums and YouTube videos and I am yet to find one that actually answers my needs.

Lots of lists with numbers which don’t help as I don’t think my channels are the same as theirs with this particular harness.

has anyone successfully completed this mod and if so any help would be appreciated.

[1inchwarrior]

Morning all.
IÂ’ve recently acquired a 59 plate Audi A4 B8 Avant with pre f/l led rear lights.

I have bought facelift LED rear lights off eBay (think they are off a 2015 plate)

I bought this Harness off ebay.
https://www.ebay.co.uk/itm/266708432...mis&media=COPY


Connected it up and the indicators work as normal both sides but the rear tail (DLR bar) and brake lights are the opposite.

I have identified each channel by changing the code to each channel one by one to the value of 44. It would then illuminate when I initiated the indicator.

Having had a play with the channels (I may be wrong) I believe that mine align like this below. The codes shown are the B8 ones which I havenÂ’t altered yet.


Channel. Function Code
195 Brake Left Inner 5251
196 Brake Left outer 5283
197 Brake right inner 5124
198 Brake Right outer 5156
199 DRL left inner 133
200 DRL Left outer 165
201 Left indicator 12
202 Right Indicator 44
203 Rear fog left 73
204 Rear fog right 105
205 Reverse left 13
206 Reverse Right 45
207 DRL right inner 5
208 DRL right outer 37

I just need to know what codes should go with those functions to make the lights operate as intended.

Is it just a case of swapping the codes around or do they require different codes completely as they are differently light units?

IÂ’ve read thorough numerous threads on various forums and YouTube videos and I am yet to find one that actually answers my needs.

Lots of lists with numbers which donÂ’t help as I donÂ’t think my channels are the same as theirs with this particular harness.

has anyone successfully completed this mod and if so any help would be appreciated.

Scrap that list above.
I made it in haste as I had drained the battery and the mmi kept shutting down mid coding.

The list is below with the channels relating to the proper function (in my car with this harness at least)

With the car fully charged this morning, IÂ’ve had another play and just used codes that I had acquired from numerous lists and this is whatÂ’s worked for mine.

Where there is no new code IÂ’ve left it as the old B8 code and it seems to function correctly.

Channel. Function B8 Code. New Code

195 Brake Left Inner 5251. 5157

196 Brake Right Inner 5283. 5189

197 Brake Left Outer 5124. 5125

198 Brake Right Outer 5156. 5157

199 DRL Left Inner 133. 49156

200 DRL Right Inner 165. 49188

201 Left indicator 12

202 Right Indicator 44

203 Rear fog left 73

204 Rear fog right 105

205 Reverse left 13

206 Reverse Right 45

207 DRL Left Outer 5. 49156

208 DRL Right Outer 37 49188

Hope this helps anyone else undertaking this project.

[tedtracy3]

Are the lights you bought US LED taillights? Do you have any pictures? I've been trying to figure out the difference between the US and Euro taillights. Is it just the Euro has amber turn signals?

[Smac770]

From the code list someone had posted from a B8.5 EU wagon LED:
fog is 73 / 105
reverse is 13 / 45
turn is 12 / 44
brake outer is 5 / 37
brake inner is 133 / 165
tail outer is 51202 / 51234
tail inner is 51201 / 51233

DRL implies the light is always on with the ignition on. Tail light, or rear position light, is the more common term for the "when you turn the parking lights or driving lights on" lights. They can be coded to be always on like DRLs, but using that term for them will likely add confusion.

The B8.0 EU wagon LED used 7 pairs; B8.5 EU wagon LED uses all 8 pairs. There's 4 signal wires and one ground wire at all four B8.5 EU wagon LED OE lamp units. Given your list, did the retrofit harness simply replicate the turn signal connection at the control module to both the outer and inner lamp units? Seeing as the coding for inner vs outer turn is the same.

The B8.0 EU wagon LED also always used 8 pairs: L/R - B8.0 function --- B8.5 function
195/196 - inner tail/brake --- outer tail
197/198 - outer tail/brake --- outer brake
199/200 - inner brake __ --- outer turn
201/202 - outer turn ___ --- inner turn
203/204 - inner fog ____ --- inner brake
205/206 - outer reverse --- outer reverse
207/208 - outer brake _ --- inner tail
209/210 - unused ____ --- inner fog

Don't know why the B8.0 replicated braking on the tail lamp elements. Maybe the dedicated brake element was not large enough from a regulations perspective?

209/210 are on the black 32-pin (pins 31 and 30).

[Smac770]

Are the lights you bought US LED taillights? Do you have any pictures? I've been trying to figure out the difference between the US and Euro taillights. Is it just the Euro has amber turn signals?

The two main differences will be the amber turn signal (not that red is mandated in the US, but apparently Americans are allergic to clarity) and the side marker LED (one area the US actually did it better).

[1inchwarrior]

Are the lights you bought US LED taillights? Do you have any pictures? I've been trying to figure out the difference between the US and Euro taillights. Is it just the Euro has amber turn signals?

They are Euro taillights as I’m from the UK.

All seemed fine, but when I activate the rear fogs, they light up and then go out throwing up a dash fault for both fog lights.

Does anyone have any suggestions as to what they could / should be coded to, to avoid this fault??

[Smac770]

Already posted the correct coding for fog; it's the same as what you already had, 73 / 105. So you'll have to look more at what the actual issue (error code) is. If the control module is claiming a bulb fault, there might be an issue in the harness? Or maybe it's the lamp units themselves? If you swap the pins for the fogs with one of the other light elements at the lamp unit plug, do they stay on lighting that element?

[1inchwarrior]

Already posted the correct coding for fog; it's the same as what you already had, 73 / 105. So you'll have to look more at what the actual issue (error code) is. If the control module is claiming a bulb fault, there might be an issue in the harness? Or maybe it's the lamp units themselves? If you swap the pins for the fogs with one of the other light elements at the lamp unit plug, do they stay on lighting that element?

When I press the rear fog button the lights illuminate at the rear of the car momentarily and then the dreaded error beep sounds followed by a light out bulb which appears on the dash (instrument cluster) with writing of right rear fog and left rear fog light fault. Then the picture of the car appears with bulb out symbols at either side of the rear of the car picture in the center of the dash.

I would upload a picture but not having much luck getting pics to upload :(

It hasn’t thrown up any errors on VCDS though.

[Smac770]

But are the fog lights actually still on? You mention momentarily, but unsure if you were saying then they go out and get the error, or just and then get the error. The bulb out error means the control module is not seeing the current flow it is expecting when the "bulb" is on. It's possible to code out the checking of those lights if they are in fact working and it's just an unexplainable fault code.

To attach images, you need to "Go Advanced", and then Manage Attachments, then upload the image file, and then "insert inline".

[1inchwarrior]

But are the fog lights actually still on? You mention momentarily, but unsure if you were saying then they go out and get the error, or just and then get the error. The bulb out error means the control module is not seeing the current flow it is expecting when the "bulb" is on. It's possible to code out the checking of those lights if they are in fact working and it's just an unexplainable fault code.

To attach images, you need to "Go Advanced", and then Manage Attachments, then upload the image file, and then "insert inline".

No when the dash beeps and the error messages are displayed the rear fogs go out.

Not really a big deal but still something that I would like to rectify if I could.

Do you think it would be as simple as putting in the correct code for them?

[Smac770]

You already have the correct code for them.
Post the complete list of the tail light relevant adaptation values, channels 181 through 214.

[Tropicgreena4]

Is this the correct adapter for a 2011 US A4 avant for retrofitting FL LED tail lights?

https://kufatec.com/en/adapter-led-f...-avant/38983-2

[Smac770]

Is this the correct adapter for a 2011 US A4 avant for retrofitting FL LED tail lights?

https://kufatec.com/en/adapter-led-f...-avant/38983-2

That would seem to be the case.

[Tropicgreena4]

That would seem to be the case.

Thank you, sir!

[avantbunnie]

Too late for that stayed up till about 3am working out the kinks and taking little things from each thread I could see compiled a list and made changes.
Best one I say that help[ed was 203 to 73 which worked and the left fog is now active. Also detection turned off to get rid of those pesky dash notification which also inherently solved the turn signal issue they now work normally the only thing left is sorting out the turn signal inside on the cluster blinks at double speed which is in another thread in which the issue was never solved at least not from what I read. As of right now all the lights function as they should and no errors on dash because 181 is bulb detection and I turned that off for the time being until I can figure out the correct coding needed.

As far as aborting I'm not a fan someone somewhere will have the issue resolution for this and I wont turn back now with everything running.
Kurt

Sorry to bump an old thread, but Kurt did you fix your turn signal issue related to the hyperblinking? I have the same problem as you right now and was wondering what the issue might be.....

Thanks,
Fred

[KEMB]

hello everyone, I would like to give my thanks to the creator of the post and to everyone who directly or indirectly made a contribution to it, I followed all the steps and finished my change from halogen to led rear lights, I found some difficulties in the process as the kufatec cable came with the wrong pins, after fixing the order of the pins everything was fine, once again thank you very much

[darren.kellum]

Nice work, a retrofit always looks better as well after having to overcome a hurdle or two along the way :-)

Sent from my NE2213 using Tapatalk

[avantbunnie]

Does anyone happen to know what channels 213/214 do in Module-46? What kind of functions do these 2 channels do? Can't seem to figure it out and it seems to differ across various cars.

Mine is:

Ch.213 - 14385
Ch.214 - 3

Smac told me his is:

Ch.213 - 16689
Ch.214 - 3