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Audi A6 TAILIGHTS DECODED

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Old 04-08-2014, 09:00 AM   #1
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Default Audi A6 TAIL LIGHTS DECODED

HELLO EVERYONE!

I have successfully decoded the Audi A6 Taillights!

US to EU conversion, Disabling rear side markers, activate rear fog lights are now possible.

I will post all the coding online, these codes also work for an Audi A5, but they have to be used with logic and not COPY PASTE.

I worked very hard to decode the taillights, it took me a month to finalize it.
------------------------------------------------------------------
CODING THE TAIL LIGHTS GUIDELINES:


Each Channel corresponds to a PIN of the wiring diagram to the comfort module for the rear taillight. So you need to know what WIRE PIN is responsible for what part of the rear taillight before recoding it to the correct value.

THERE IS ALWAYS A DIFFERENCE OF "32" NUMBERS BETWEEN THE LEFT AND THE RIGHT CHANNEL

PLEASE ASK ME QUESTIONS BEFORE YOU DO ANYTHING ON YOUR OWN.

MODULE INVOLVED: COMFORT MODULE [46]
SECURITY CODE: 16017
CHANNELS RESPONSIBLE FOR THE TAIL LIGHTS CODING: 195 - 210

FOR US MARKET:
TO DEACTIVATE THE SIDE MARKERS CHANGE CHANNEL VALUE TO


209: 0 (OUTER LEFT) OR TURN SIGNAL FOR THE EU MARKET (12)
210: 32 (OUTER RIGHT) OR TURN SIGNAL FOR THE EU MARKET (44)


TO ACTIVATE THE REAR PARKING LIGHTS CHANGE THE VALUES TO:

199: 51201 (TAIL LIGHT BULB INNER LEFT)
200: 51233 (TAIL LIGHT BULB INNER RIGHT)
201: 51202 (TAIL LIGHT BULB + PARKING LIGHT OUTER LEFT)
202: 51234 (TAIL LIGHT BULB + PARKING LIGHT OUTER RIGHT)

AND

[09 Cent. Elect.] Byte 9 Change Bit 0 to 1

-------------------------------------------------------------------------------
IMPORTANT:

To retrofit the EUROPEAN taillights, you either have to swipe two wires in the inner taillights (T2 <--> T3) or you can keep the wires as is, and
code them accordingly:

CHANNEL [195: 12 & 196: 44] and [203: 5 & 204: 37]

================================================== ===========
HERE IS THE EXCEL SHEET WITH ALL THE VALUES, THE SHEET IS SELF EXPLANATORY
USE THE SAME LOGIC TO RECODE THE A4 FACELIFT, A5 FACELIFT, A6 , A7, A8 TAILLIGHTS 2012+

PLEASE DONT HESITATE TO CONTACT ME FOR ANY QUESTIONS

PLEASE DO THE CODING AT YOUR OWN RISK, I AM NOT RESPONSIBLE FOR ANY DAMAGES YOU MAY CAUSE AFTER CODING.

Click the image to open in full size.

Click the image to open in full size.
Attached Images
File Type: jpg CODING.jpg (21.0 KB, 786 views)
File Type: jpg CODES.jpg (18.3 KB, 786 views)

Last edited by kdagher; 04-09-2014 at 08:32 AM.
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Old 04-08-2014, 09:32 AM   #2
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Quote:
Originally Posted by kdagher View Post
I have successfully decoded the Audi A6 Taillights!

US to EU conversion, Disabling rear side markers, activate rear fog lights are now possible.

I will post all the coding online, these codes also work for an Audi A5, but they have to be used with logic and not COPY PASTE.

There is a always a difference between the Left channel and Right Channel of 32.

I will post the excel sheet by the end of the day! Hope you are all happy and excited for these news
This is AWESOME news, are these just changes in VAG com?
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Old 04-08-2014, 10:09 AM   #3
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It's only VAG COM
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Old 04-08-2014, 10:32 AM   #4
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i have updated the topic! enjoy the codes

Last edited by kdagher; 04-11-2014 at 02:53 PM.
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Old 04-08-2014, 10:45 AM   #5
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Very cool! Thanks for giving back to the community. I'll look thru that when I have a bit more time.

I had the taillights re-programmed on my '11 A4 by a fellow (DavidB8) from the NWT in Canada. He and his pal seemed to have spent a lot of time reverse engineering all the coding possibilites. It appears to have been quite an undertaking.

i don't believe they ever shared the actual coding info.
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Last edited by uberwgn; 04-08-2014 at 10:47 AM.
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Old 04-08-2014, 10:52 AM   #6
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Yes, i know that DavidB8 decoded them, but he never released the codes.

I worked very hard with my friend in Germany, and we decoded them ourselves and decided to release it to the public.

These codes are valid for 2012+, since david decoded the pre facelift A4 and A5, i decided not to release them public yet. There is a tiny small difference for the tailights, the rest is the same, but you must use the wiring diagrams to know what you are actually coding.

Each Channel corresponds to a PIN of the wiring diagram to the comfort module for the rear taillight. So you need to know what WIRE PIN is responsible for what light before recoding it to the correct value.
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Old 04-08-2014, 01:30 PM   #7
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This is amazing work! Thank you so much!

Is there a way to enable the signal lights to blink seperate from the brake lights like the EU function?

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Old 04-08-2014, 02:33 PM   #8
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+1 more "very nice work" and thanks for sharing. This is great work and a real service to all who can enjoy the fruits of your labor.
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Old 04-08-2014, 04:31 PM   #9
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Quote:
Originally Posted by Hockenheim View Post
This is amazing work! Thank you so much!

Is there a way to enable the signal lights to blink seperate from the brake lights like the EU function?

2012 Audi A6 Sedan Exterior Lighting - YouTube
YES it is possible to Seperate the brake and the turn signal ONLY in the INNER tailights, it doesnt work on the OUTER because,US version has the brake and turn signal on the same circuit.
Audi used the Turn signal CHANNEL for the side markers, on the US version.
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Old 04-08-2014, 04:56 PM   #10
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Thanks for your work. This is great find.

Snagit, please make this sticky.
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Old 04-09-2014, 03:16 AM   #11
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I'd love to add this to the AudiWorld tech section. Any objections?
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Old 04-09-2014, 07:06 AM   #12
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Quote:
Originally Posted by Kris Hansen View Post
I'd love to add this to the AudiWorld tech section. Any objections?

PLease go ahead
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Old 04-09-2014, 08:22 AM   #13
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Quote:
Originally Posted by kdagher View Post
-------------------------------------------------------------------------------
To retrofit the EUROPEAN taillights, you either have to swipe two wires in the inner taillights (T2 <--> T3) or you can keep the wires as is, and
code them accordingly:

CHANNEL [195: 12 5 & 196: 44 37] and [203: 5 12 & 204: 37 44]

================================================== ===========
If I interpret your writing and spreadsheet correctly and correlate them, is the above correction I made valid? The values you stated are in Red and my corrections are in Blue. This I think brings it in line with what the spreadsheet says. Or am I completely off track here?

BTW - This is awesome! Gives us a deeper understanding of how CAN networks work!
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Old 04-09-2014, 08:31 AM   #14
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Quote:
Originally Posted by Jatmobil View Post

If I interpret your writing and spreadsheet correctly and correlate them, is the above correction I made valid? The values you stated are in Red and my corrections are in Blue. This I think brings it in line with what the spreadsheet says. Or am I completely off track here?

BTW - This is awesome! Gives us a deeper understanding of how CAN networks work!
Yes you are a bit off track hehe, if you want to follow the spreadsheet, you need to swap the wires in your inner lights T2 <--> T3 (they switched the wires for the upper and lower US vs EU) then you should use the BLUE, if you do not want to swap the wires, you need to use the codes in RED

LEFT 12 & RIGHT 44 ==> Turn Signal activation
LEFT 5 & RIGHT 37 ===> BRAKE ONLY

These codes can be used to any channels, you can have your rear fog light act as turn signal, and your reverse as brake if you want. You need to understand which pin is responsible for which light, then you can do whatever you want
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Old 04-09-2014, 08:36 AM   #15
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removed my side markers last night! worked like a champ, the car looks so much better at night,

THANKS!
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Old 04-09-2014, 08:38 AM   #16
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Quote:
Originally Posted by kdagher View Post
YES it is possible to Seperate the brake and the turn signal ONLY in the INNER tailights, it doesnt work on the OUTER because,US version has the brake and turn signal on the same circuit.
Audi used the Turn signal CHANNEL for the side markers, on the US version.
Is it possible to install EU tails and make them exactly like in the video without changing wiring?
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Old 04-09-2014, 01:18 PM   #17
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Originally Posted by Hockenheim View Post
removed my side markers last night! worked like a champ, the car looks so much better at night,

THANKS!
Great
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Old 04-14-2014, 09:51 AM   #18
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I am going to post the Audi A4/A5 codes as well.. Just decided hehe
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Old 04-24-2014, 12:29 PM   #19
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Thanks kdagher!

I tried tackling it a couple months ago on my 2013 A4 and found the Outer lights (EU Signal/Brake lights) are coded as 1 channel in the US. You are right, it's mostly due to the fact we have side market light using the extra channel. Is there anyway we can separate them so the light matches the EU ones?
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Old 04-25-2014, 07:34 AM   #20
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Default A Little Help....

I tried to read and understand this but I got 'lost' at the spreadsheet...so here is my question:

Do 'our' rear fog lights not work and is the only way to make them work to use a VAG-COM and re-wire some leads to the light fixtures?

Thanks!
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Old 04-25-2014, 07:34 AM
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