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Thread: Golf GTE (2020) DRL activation

  1. #1
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    Golf GTE (2020) DRL activation

    Hi all

    I have a 2020 UK spec Golf GTE Advance with full adaptive lighting, inside the headlight there are 2 'L' shape lights.
    On a GTI or GTD these lights serve as the DRL and side light function.
    On my GTE they only serve as the side light function and not the DRL, I do have both L shape lights installed within the headlight..

    I have read that that the function of these lights have been moved from the 09 CCM to the 4B module.
    I'm trying to simply activate the DRL function of these lights, and have them function as the GTI / GTD.


    My car has the separate 'C' shaped LED lights in the bumper which I can control / switch off through the 09 CCM adaptations.
    I cant see anything for DRL in either 09 CCM (other than the C lights) or in the 4B module.

    Any ideas?
    Autoscan and ADMAPS can be downloaded from this onedrive link:
    https://1drv.ms/u/s!AvMsIPFrJPaJgeZF...mIs7A?e=OhbBVb

    Thanks
    Phil
    Last edited by Xpower; 05-03-2020 at 01:05 PM.

  2. #2
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    are you positive both Ls can actually light up into your headlight assembly? I would double check the wiring diagrams, as headlight assemblies are 100% a different part number between e-Golf and GTI.
    my Golf left the factory with 18 ECUs. now she has 27. and counting

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    Verified VCDS User DV52's Avatar
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    Xpower:Hi. Very interesting problem - thanks for posting


    I'm not sure if you are aware, but a few of the forum's "Leuchte-nerds" have been discussing the question of the mysterious IDE05145-Light configuration channel (in the BCM) on MQB platform cars that are fitted with LCM s - here.

    I have been purely an intellectual voyeur in these discussions - but the underlying hypothesis which has been developed by some very bright forum colleagues is that there maybe a correlation between the setting in this channel and the operation of the LCM s.

    The channel above has a value which is 448 x digits long - but VCDS mercifully reports these digits as 224 x hexadecimal pairs (the OBD11 device which I also use is not so quite so kind to users).

    The new hypothesis postulates that the values in this channel are allocated as 16 x hex-pairs per Leuchte-set. So, 224 divided by 16 = 14 x Leuchte-sets

    Anyway, based on my understanding of this very preliminary work, I have decoded the channel setting in your BCM admap into equivalent Leuchte-set values in the spreadsheet which you can download HERE

    To explain the worksheet: This is all new stuff and one of the many aspects of the hypothesis that I believe still needs further work is to understand how the 14 x Leuchte-sets are allocated to the individual lamps in the headlight assemblies. I have done a similar analysis on a few vehicles now and it seems that this might vary with the model car, or/and the headlight type (I suspect). So, I have simply numbered each Leuchte-set in my spreadsheet 1-14, rather than guessing which lamp is controlled by which Leuchte-set. Nevertheless, it is clear from the entries in the "Leuchte function" column that the Leuchte-sets are paired for the right/left side.

    In the final column of my spreadsheet which has the heading "Code", I have included the particular hex-pair from the channel setting that relates to each entry in the 14 x Leuchte-sets.

    So - how might this information be useful for your wants?

    Well, the first task (I think) is to identify which Leuchte-set is allocated to which lamp on your car. From my analysis- it's clear that 6 x Leuchte-sets in the Light configuration channel are not enabled on your car. And, it's relatively easy from the entries in the "Setting" column to divide the Leuchte-sets into left/right side using the "links/rechts" identifiers (where they appear).

    Of the 8 x Leuchte-sets that are active:
    • Leuchte-set #5 =DRL function (car side unknown)
    • Leuchte-set #6 =DRL function (car side unknown)
    • Leuchte-set #7 = Left-side, low-beam & high-beam flash
    • Leuchte-set #8 = Right-side, low-beam & high-beam flash
    • Leuchte-set #9 = Right-side, Parking Light & Single Side Parking Light
    • Leuchteset #10 = Left-side, Parking Light & Single Side Parking Light
    • Leuchte-set #13 =Left-side, low-beam
    • Leuchte-set #14 =Right-side, low-beam


    Looking through the list above and based on your explanation that the inner "angel eyes" on the car currently operate as "side-lights" (which I understand to mean "parking lights" in my parlance) - Leuchte-sets #9 and #10 appear to be encouraging candidates - maybe?

    The second task is to determine how to change the programming. If you look at the "Leuchte function" column in my spreadsheet for Leuchte-set #9/10, Lichtfunktion B is a possibility because its current value is not active and because the Dimmwert AB value is 127 (so, full illumination).

    The third task is to decode the DRL Leuchte-command to the requisite hex-pair code for the light configuration channel - which is hex14.

    The fourth task is to identify where in the code string for IDE05145-Light configuration channel to splice the new 2 x DRL commands:
    • for the right-side lamp - CAREFULLY look for the sequence - 4B 46 00 7F - change to - 4B 46 14 7F
    • for the left-side lamp - CAREFULLY look for the sequence - 49 46 00 7F - change to - 49 46 14 7F


    Finally, a caveat - as I have already said, this is brand new stuff (for me). I'm just guessing!!!

    Don
    Last edited by DV52; 05-03-2020 at 11:04 PM.
    VW Golf MkVII (MY13) - A3 8V hatch (MY17)

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  6. #4
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    Quote Originally Posted by darkchina811 View Post
    are you positive both Ls can actually light up into your headlight assembly? I would double check the wiring diagrams, as headlight assemblies are 100% a different part number between e-Golf and GTI.
    Yes, as you can see from the picture in ‘side light’ mode both ‘L’ lights are lit.
    The E golf does indeed have a single L and so does the GTE in some cases (year and headlight spec dependant)
    Mine does indeed have both L’s

    Thanks

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    Quote Originally Posted by DV52 View Post
    Xpower:Hi. Very interesting problem - thanks for posting


    I'm not sure if you are aware, but a few of the forum's "Leuchte-nerds" have been discussing the question of the mysterious IDE05145-Light configuration channel (in the BCM) on MQB platform cars that are fitted with LCM s - here.

    I have been purely an intellectual voyeur in these discussions - but the underlying hypothesis which has been developed by some very bright forum colleagues is that there maybe a correlation between the setting in this channel and the operation of the LCM s.

    The channel above has a value which is 448 x digits long - but VCDS mercifully reports these digits as 224 x hexadecimal pairs (the OBD11 device which I also use is not so quite so kind to users).

    The new hypothesis postulates that the values in this channel are allocated as 16 x hex-pairs per Leuchte-set. So, 224 divided by 16 = 14 x Leuchte-sets

    Anyway, based on my understanding of this very preliminary work, I have decoded the channel setting in your BCM admap into equivalent Leuchte-set values in the spreadsheet which you can download HERE

    To explain the worksheet: This is all new stuff and one of the many aspects of the hypothesis that I believe still needs further work is to understand how the 14 x Leuchte-sets are allocated to the individual lamps in the headlight assemblies. I have done a similar analysis on a few vehicles now and it seems that this might vary with the model car, or/and the headlight type (I suspect). So, I have simply numbered each Leuchte-set in my spreadsheet 1-14, rather than guessing which lamp is controlled by which Leuchte-set. Nevertheless, it is clear from the entries in the "Leuchte function" column that the Leuchte-sets are paired for the right/left side.

    In the final column of my spreadsheet which has the heading "Code", I have included the particular hex-pair from the channel setting that relates to each entry in the 14 x Leuchte-sets.

    So - how might this information be useful for your wants?

    Well, the first task (I think) is to identify which Leuchte-set is allocated to which lamp on your car. From my analysis- it's clear that 6 x Leuchte-sets in the Light configuration channel are not enabled on your car. And, it's relatively easy from the entries in the "Setting" column to divide the Leuchte-sets into left/right side using the "links/rechts" identifiers (where they appear).

    Of the 8 x Leuchte-sets that are active:
    • Leuchte-set #5 =DRL function (car side unknown)
    • Leuchte-set #6 =DRL function (car side unknown)
    • Leuchte-set #7 = Left-side, low-beam & high-beam flash
    • Leuchte-set #8 = Right-side, low-beam & high-beam flash
    • Leuchte-set #9 = Right-side, Parking Light & Single Side Parking Light
    • Leuchteset #10 = Left-side, Parking Light & Single Side Parking Light
    • Leuchte-set #13 =Left-side, low-beam
    • Leuchte-set #14 =Right-side, low-beam


    Looking through the list above and based on your explanation that the inner "angel eyes" on the car currently operate as "side-lights" (which I understand to mean "parking lights" in my parlance) - Leuchte-sets #9 and #10 appear to be encouraging candidates - maybe?

    The second task is to determine how to change the programming. If you look at the "Leuchte function" column in my spreadsheet for Leuchte-set #9/10, Lichtfunktion B is a possibility because its current value is not active and because the Dimmwert AB value is 127 (so, full illumination).

    The third task is to decode the DRL Leuchte-command to the requisite hex-pair code for the light configuration channel - which is hex14.

    The fourth task is to identify where in the code string for IDE05145-Light configuration channel to splice the new 2 x DRL commands:
    • for the right-side lamp - CAREFULLY look for the sequence - 4B 46 00 7F - change to - 4B 46 14 7F
    • for the left-side lamp - CAREFULLY look for the sequence - 49 46 00 7F - change to - 49 46 14 7F


    Finally, a caveat - as I have already said, this is brand new stuff (for me). I'm just guessing!!!

    Don
    Thank Don

    I have made the changes you suggest but unfortunately there was no difference.
    I checked and no additional lights were on the car at all (in case it was a different channel some how)

    I also tried setting them to 01 instead of 14 which should be Active 100% instead of DRL but still no luck.
    More thinking required for the both of us

  8. #6
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    Quote Originally Posted by Xpower
    Yes, as you can see from the picture in ‘side light’ mode both ‘L’ lights are lit.
    Somehow the picture did not load. I'll think about it and come back to you eventually.
    my Golf left the factory with 18 ECUs. now she has 27. and counting

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    Quote Originally Posted by Xpower View Post
    Thank Don

    I have made the changes you suggest but unfortunately there was no difference.
    I checked and no additional lights were on the car at all (in case it was a different channel some how)

    I also tried setting them to 01 instead of 14 which should be Active 100% instead of DRL but still no luck.
    More thinking required for the both of us
    Xpower: hmm......... bummer!!! I assume that you entered the magic number (31347) before making the change and that the hex pair did actually change?

    I was relying-on this observation from the original discussion in my link

    Quote Originally Posted by Somnus View Post
    TBAx,

    You are correct on changing a byte in the light config does cause an immediate change to the Leuchte channel it is assigned to.

    As a test, I changed the Light Function A byte for the left fog light from 12 to 18 and, after checking the related Light Function A channel it now displays Brake Light
    However, Somnus's car in the extract above uses the factory Leuchte-sets in the BCM (i.e. the car doesn't have LCM s)

    Guess the hypothesis needs further work - thanks for being my road-test dummy (no offense intended)!

    Don
    Last edited by DV52; 05-04-2020 at 06:29 PM.
    VW Golf MkVII (MY13) - A3 8V hatch (MY17)

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    Quote Originally Posted by DV52 View Post
    Xpower: hmm......... bummer!!! I assume that you entered the magic number (31347) before making the change and that the hex pair did actually change?

    I was relying-on this observation from the original discussion in my link



    However, Somnus's car in the extract above uses the factory Leuchte-sets in the BCM (i.e. the car doesn't have LCM s)

    Guess the hypothesis needs further work - thanks for being my road-test dummy (no offense intended)!

    Don
    I did indeed, and I double checked that the hex changed.

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  12. #9
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    This has to do with dataset in D7 D6 29 and 39. No coding involved

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  14. #10
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    Quote Originally Posted by vastechnics View Post
    This has to do with dataset in D7 D6 29 and 39. No coding involved
    Could you elaborate? I’m sure that in those modules there were no coding or adaptation options. Only fault codes, live data

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