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Thread: 2013 A6 Allroad 4G C7 - xenon retrofit

  1. #1
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    2013 A6 Allroad 4G C7 - xenon retrofit

    I already posted a full scan for this wagon here:
    https://forums.ross-tech.com/showthr...H-UK-RHD-Model

    I have acquired all the OE parts for a bi-xenon headlight upgrade and the conversion looms from Kufatec. The loom is annoyingly configured for LHD vehicles (as it assumes J519 is on the left side of the car) only so I need to extend or swap some wires if I want to keep the sense of left & right correct so that an option to enable corner/kerb lighting is maintained.

    I will post all the part numbers in due course, but I was looking at the coding instructions supplied by Kufatec and wanted to check a few things as there isn't a fully documented view in VCDS for long coding of J519 - Address #09 - Central Electrics Module. Snippet below...

    Address 09: Cent. Elect. (J519) Labels:. 4H0-907-063-V1.CLB
    Part No SW: 4H0 907 063 BP HW: 4H0 907 063
    Component: BCM1 2.0 H12 0111
    Revision: 11012002 Serial number: 00000001287572
    Coding: 690000108034A7E00905008300005F5FCF9DC7082708010100 0008402000
    Shop #: WSC 02391 785 00200
    VCID: 77BEEF70C6B560F2EA-8023

    So the first thing to check is whether this controller is suitable for xenon conversion - 4H0 907 063 BP. I was thinking of just unplugging the halogen lights and trying the long coding for xenon config to see if coding is accepted or not. Then temporarily connecting the xenon lights with the adapter loom will allow me to check most functions before diving into the spaghetti hell where J519 lives in the drivers footwell.

    As for long coding, the instructions will have the following impact on #09, but I don't know if these are 100% correct for a wagon with adaptive air suspension (AAS).

    Byte 00: 69 --> 26
    Byte 02: 00 --> 20
    Byte 04: 80 --> 88 (or 89 for corner/kerb light mode active)
    Byte 06: A7 --> 9F
    Byte 14: 5F --> 1D
    Byte 15: 5F --> 0C
    Byte 27: 40 --> 60
    Byte 28: 20 --> 21

    This coding is for the NON-dynamic xenon headlights - the integrated fog light can be set up as kerb light during cornering but this coding is not for the whizzy turning dynamic AFS xenons.

    This seems to line up reasonably well with a xenon equipped LHD 4G that found in the VCDS forum. That had some problems which I would put down to a difference in Byte 04 (which should be 88 or 89 instead of 40). All the other bytes relevant to headlights seem to line up:

    Current Coding: 690000108034A7E00905008300005F5FCF9DC7082708010100 0008402000
    OTHER Coding: 2600201040349FE08181008380001D0C0F9CC3082609010100 0004602101

    The next challenge will be with the automatic headlight levelling controller (J431) - 4H0 907 357 A - which needs to be configured in a way where it takes information about suspension level from the CAN Bus instead of being wired directly to front and rear height sensors which a mechanically sprung 4G would use to determine the height of the car.

    Is J431 coding well documented I wonder ?

  2. #2
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    Quick update on this one after checking the schematics and the topology of the two Kufatec adapter looms. One is for headlight lamps, the other has the 4-wire position motor wiring from J431 which is needed to stay legal in UK for xenon lamps.

    As suspected, both looms are built on basis that cables exit the cabin near J519 & J431 on left side to align with LHD cars, so a number of pin swaps have to be made to keep the correct sense of left and right when the loom is routed from J519 & J431 positions on RHD.

    The main wiring loom is simple enough - there are two flying cables for xenon screen control (referred to as purple and white wires in Kufatec docs). The WHITE wire is RIGHT on RHD.

    The J431 wiring is a bit more time consuming - I effected these pin swaps on the loom wires for J431 with some careful splicing after checking the wiring & pinouts twice.

    17 <--> 15
    19 <--> 21
    16 <--> 22
    18 <--> 20

    Again its worth noting this is only required on RHD cars if you want the correct sense of left and right to be called out in the event of any fault codes. Being a bit fussy I wanted to do it right.

  3. #3
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    I am surprised Kufatec does not offer a RHD version of their looms, give the price at what they sell them. but I'll tell you what, the only loom I bought from them was to retrofit heated seats, and it was shorter than needed. I had to route it differently, not OEM style. again, for the price I paid, I was pretty pissed.

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    Yeah I was annoyed at the price too - having one in my hand now, with all the connector part numbers visible, I know that I could replicate it for a fraction of the price, but you are paying for convenience to have Hans or Franz make one for you. I cannot fault the quality with which the looms are built.

    It was only after I buzzed it all out and tested the new headlight modules on the bench that I realised the sense of left and right was going to be mixed up - not a problem to get lights functioning, but potentially confusing down the line if fault codes get thrown up for the 'wrong' light. Thats why I figured it wise to swap them over.

    To be honest though, the price of the Kufatec looms is only a small part of the overall cost of the xenon conversion using OE parts.

    1 x Hella bi-xenon lights 1LL 011 150 381 (Right) with embedded LED DRL
    1 x Hella bi-xenon lights 1LL 011 150 371 (Left) with embedded LED DRL
    2 x OEM xenon bulb controller (aka ballast) 8K0 941 597 E (aka Mitsubishi MH7)
    2 x OEM daylight running lamp (DRL) controller 4G0 907 397 D (aka Delphi 28297178)
    1 x headlamp level controller (J431) 4H0 907 357 A
    1 x Kufatec xenon adapter loom for Audi A6, A7 (4G) - 38886
    1 x Kufatec adaptive headlamp level loom for 4G with AAS - 38890-1
    2 x Osram D3S main bulbs
    2 x Osram H7 bulbs (fog/corner)
    2 x PSY24W indicator bulbs
    and 10 x N 105 263 02 screws that secure the controller modules onto the light units

    Hopefully it won't take too long to find right codes for the headlamp level controller - Kufatec instructions suggests a code for this variant of their loom on 4G vehicles with AAS so we will see if that is correct when I get round to that part.
    Last edited by nugentp; 01-08-2019 at 08:47 AM. Reason: typo fixed

  6. #5
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    I had the xenon lights before i fitted the full led ones. My J519 was the BN version which supersedes to the BP version which you have so will work fine.
    My coding for 55 :
    Address 55: Headlight Range (J431) Labels: 8X0-907-357.clb
    Part No SW: 4H0 907 357 A HW: 4H0 907 357 A
    Component: ....LWR12.... H02 0013
    Serial number: 120430-0004-084
    Coding: 1122A6101000A300
    Shop #: WSC 02391 785 00200
    ASAM Dataset: EV_HeadlRegulBasic 005001
    ROD: EV_HeadlRegulBasic.rod
    VCID: 2C5CF23B4744505ED1-8078
    A6 BiTdi Avant MTM
    Retrofitted: Full Led Headlights, DAB, Full Electric Seats, Power Tailgate, Surround View Cameras, Genuine RS6 Grille, RS6 Seats,Leather Door Armrests, Soft Close Doors, Rear Side Blinds, Electric Steering Column, LED Sill Plates, Ambient Lighting Pack, High Beam Assist, Eibach Springs, Led Roof Console, 4 Zone Climate, Rear Heated Seats, Head Up Display, Side assist, Alcantara Interior Retrim

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    Thats great info morski - many thanks for that, but does your car have adjustable air suspension (AAS) ?

    I had a look at the car earlier today in the hope of being able to unplug the connector from the halogen lamps and quickly test out the J519 coding with the xenon lights connected temporarily but I cannot even get a finger on the stupid plug locations for the lights so they need to be removed for access to the connector, which is a bumper removal job (as you will know).

  8. #7
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    At the moment no. Its standard steel shocks etc. So it uses the 2 level sensors for reference. Im now fitting air suspension which uses 4 level sensors which are different to the 2 already fitted. So the headlight levelling is done in conjunction with air suspension from the same sensors.
    A6 BiTdi Avant MTM
    Retrofitted: Full Led Headlights, DAB, Full Electric Seats, Power Tailgate, Surround View Cameras, Genuine RS6 Grille, RS6 Seats,Leather Door Armrests, Soft Close Doors, Rear Side Blinds, Electric Steering Column, LED Sill Plates, Ambient Lighting Pack, High Beam Assist, Eibach Springs, Led Roof Console, 4 Zone Climate, Rear Heated Seats, Head Up Display, Side assist, Alcantara Interior Retrim

  9. #8
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    Slightly easier access is available from behind the wheel liners. Still not easy but easier than full bumper off jobby
    A6 BiTdi Avant MTM
    Retrofitted: Full Led Headlights, DAB, Full Electric Seats, Power Tailgate, Surround View Cameras, Genuine RS6 Grille, RS6 Seats,Leather Door Armrests, Soft Close Doors, Rear Side Blinds, Electric Steering Column, LED Sill Plates, Ambient Lighting Pack, High Beam Assist, Eibach Springs, Led Roof Console, 4 Zone Climate, Rear Heated Seats, Head Up Display, Side assist, Alcantara Interior Retrim

  10. #9
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    How much of the gear have you already got?
    A6 BiTdi Avant MTM
    Retrofitted: Full Led Headlights, DAB, Full Electric Seats, Power Tailgate, Surround View Cameras, Genuine RS6 Grille, RS6 Seats,Leather Door Armrests, Soft Close Doors, Rear Side Blinds, Electric Steering Column, LED Sill Plates, Ambient Lighting Pack, High Beam Assist, Eibach Springs, Led Roof Console, 4 Zone Climate, Rear Heated Seats, Head Up Display, Side assist, Alcantara Interior Retrim

  11. #10
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    @morski - I have everything I need here in terms of parts for the xenon conversion and tested everything on the bench. I am less worried about testing out the controller coding with your information that an older J519 than mine works with the xenon bulbs so I just need to get on with bumper removal when I am in the right mood for the lamp swap. Seems like you have retro-fitted almost every option onto your BiTDi which must have cost you a small fortune - I do like those wagons. I do wish our C7 allroad had the comfort seats with memory function - the base seats are nothing like as supportive or comfy as the electric Recaros in our old C5 allroad.

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