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Thread: Passat B8 BiTDI retrofited to front RS3 370mm BREMBO brakes .

  1. #1
    Verified VCDS User @DRI@N's Avatar
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    Passat B8 BiTDI retrofited to front RS3 370mm BREMBO brakes .

    Hello,

    From about six months I put to my car Passat B8 a new pair of front brake from Audi RS3 8P 370mm (4 piston caliper) and i have a small problem after my opinion .

    The problem I have with the new RS3 brakes is :
    When I go with 40 km/h and I'm obliged to put a BRUTAL BREAK the ABS pump do nothing (the front wheels it effective locks them) .

    Now my question is :
    It is possible to do with VCDS a coding / adaptation on ABS PUMP to know the pump that I upgraded the front brakes ??

    I mention that at higher speeds the wheels do not lock on brutal brakes !!!
    I apreciate any advice from yours !!!

    Thanks,
    Best regards .

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    Yes, you need to code the ABS pump to accomodate for the bigger brakes. Somnus has a link to his excellent ABS coding excel in his signature.

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    Verified VCDS User @DRI@N's Avatar
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    @downtime

    Thanks for your info .
    I download the excel document from Somnus signature but I'm not so sure what byte to change !!!

    If you know what byte to modify you find below my VCDS details :
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes (J104) Labels: 5Q0-907-379-IPB-V1.clb
    Part No SW: 3Q0 907 379 H HW: 3Q0 907 379 H
    Component: ESC H34 0906
    Revision: 00000000 Serial number: 42044000000257
    Coding: 0EEC6B8F54200B6C0779070941CA6970D62AD0E0E08296F5B8 6250F8CAA9
    Shop #: WSC 08601 003 1048576
    ASAM Dataset: EV_Brake1UDSContiMK100IPB 034001
    ROD: EV_Brake1UDSContiMK100IPB_034_VW37.rod
    VCID: 3FD84B3167F2F5BFF33-806A

    No fault code found.
    -------------------------------------------------------------------------------
    Thanks,
    Best regards

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    brake calipers have no electronics and the car doesn't know you replaced them. how did it brake before the swap?

    I am just curious. I upgraded my front brakes and I have driven a couple of weeks before changing the ABS coding. no difference whatshowever...
    my Golf came out of the factory with 13 ECUs. now she has 20. and counting

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    Before the swap the brake work perfect, like a normal standard brake !!!

    Now the BREMBO's block the wheel when I have the speed below 40 km/h and I put the BRUTAL BRAKE (for example when the pedestrian crossing the road without being assured) and I am obliged to STOP the car .
    If I have speed over 40 km/h (for example 80 or more) the brake work perfect NOT BLOCKING the wheel when I brake (but I didn't a test with a BRUTAL BRAKE at that speed) !!!

    Your car what kind of brakes has ???

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    I upgraded discs from 288mm to 312mm but calipers are the same... but mine was a factory upgrade, I mean the Golf exists with both options.

    RS3 brakes on Passat are not a factory upgrade I believe, although you might look for RS3 scans and check ABS bytes 4/17 for front and 14/22 for rear... provided it's the same ABS family and that car has the brakes you installed.
    my Golf came out of the factory with 13 ECUs. now she has 20. and counting

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    Verified VCDS User @DRI@N's Avatar
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    You make referring to bytes 4 & 17 from long coding or the byte after accesing long coding helper ???

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    From what I know about the RS3 Controller, Byte 4 is set to D4 and Byte 17 is set to 2B on cars with 370x34mm (PR. 1LH, 1LL) Front Brakes.

    However, i'm not sure if that will be accepted on a 3Q0 Module, since the RS3 uses an 8V0 module, and they have some differences in their coding.

    If you want to give it a try, here is your ABS code with the front brake bytes changed to RS3 coding.

    DISCLAIMER: As this is a completely unknown change (to me at least), I can't guarantee that the following code will be accepted or have the desired effect.

    Code:
    0EEC6B8FD4200B6C0779070941CA6970D62BD0E0E08296F5B86250F8CAA9
    If you are curious about the MK100 ABS controller's Bits and Bytes >>MK100 ABS Coding (Google Drive)<< NOT 100% ACCURATE, INFORMATION ONLY

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    Quote Originally Posted by darkchina811 View Post
    brake calipers have no electronics and the car doesn't know you replaced them. how did it brake before the swap?

    I am just curious. I upgraded my front brakes and I have driven a couple of weeks before changing the ABS coding. no difference whatshowever...
    Adrian has different brake calibers and those will make the difference.

    My assumption is that with the coding change the brake pressure is controlled in a different way.

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  13. #10
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    Somnus I try tomorrow to recode the ABS module with the code given to you !!!

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