Coding abs module for S4 brakes

[seanf86]

I've searched and searched and have not found one successful thread where someone has changed the coding, I've replaced my module and recoded it to stock successfully. This summer I installed b6 s4 front brakes on my car and I've found the front brakes are very grabby causing the abs to come on in wet and even sometime dry conditions since they grab so well, I have driven the car once since its snowed and it sits in my garage because even with blizzacks on it the lightest dusting of snow the abs goes off trying to stop where my b5 with snow tires I can stop way faster.

Obviously this is a bias issue as everything in the front is new and it doesnt pull any which way, eventually I'd like to swap in b7 a4 rears when its time to replace my rear brakes but in the meantime I'd like to make my setup work as is. In my last hour of searching I've read that certain part number modules won't take certain coding and that the b6 a4, b6 s4 and b7 a4 all use different p/n abs modules and I'm scared to try coding it since the damn thing is so touchy I don't want to render my abs totally useless in the event it doesnt take the coding and fuck up.

My car is a 2002 1.8t quattro m/t stock coding is 04275 I've read that the brembo option is for the s4 brakes but the fnr option is b7 a4 brakes however the s4 uses the same caliper as the b7 and I can't find any hard proof which code to use.

If anyone has any insight feel free to post it and I'll give it a shot, worst case I'll code it to b6 3.0 312mm brakes and hope it makes a difference.

[diagnosticator]

I recoded my ABS module to the 16 inch FNR G60 coding for my B6 S4 front brakes. The login value must be derived using the stock front brake size, then the new coding value is determined using the new larger brake coding.

;---------------------------------------------------
;
; login/coding-ii
;
;---------------------------------------------------
;
;
L00,Brake Electronics (J104/Bosch 5.7) Login
L01,0?xxx: Chassis
L02,9 = Audi A4
L03,0x?xx: Brakes
L04,2 = Brembo 17" (PR-1LJ)
L05,3 = FN3 16" (PR-1LT/1LF)
L06,4 = HP2 16" (PR-1LX)
L07,4 = FNR 16" (PR-1LA/1LG)
L08,5 = FN3 15" (PR-1LB/1LE)
L09,6 = C54 (PR-1LZ)
L10,0xx?x: Engine
L11,5 = 4/6 Cyl. Diesel
L12,7 = 4/5 Cyl. Gasoline
L13,9 = 6/8 Cyl. Gasoline
L14,0xxx?: Transmission
L15,5 = Manual
L16,7 = Automatic (09L)
L17,9 = Multitronic (01J)
L18,
L19,Note #1: After Login/Coding-II has been carried out you need to recode the Control Module.
L20,Note #2: Special Login/Coding-II 09399 is used for BFB Engine with 1LT Brakes and Multitronic.
L21,
L22,40168 = Basic Settings Enabling (i.e. mandatory prior to Steering Angle Sensor Alignment)


Then:

;---------------------------------------------------
;
; coding
;
;---------------------------------------------------
;
;
C00,Brake Electronics (J104/Bosch 5.7) Coding
C01,0?xxx: Chassis
C02,4 = Audi A4
C03,0x?xx: Brakes
C04,1 = C54 (PR-1LZ)
C05,2 = FN3 15" (PR-1LB/1LE)
C06,3 = HP2 16" (PR-1LX)
C07,3 = FNR 16" (PR-1LG)
C08,4 = FN3 16" (PR-1LT/1LF)
C09,5 = Brembo 17" (PR-1LJ)
C10,0xx?x: Engine
C11,5 = 4/6 Cyl. Diesel
C12,7 = 4/5 Cyl. Gasoline
C13,9 = 6/8 Cyl. Gasoline
C14,0xxx?: Transmission
C15,5 = Manual
C16,7 = Automatic (09L)
C17,9 = Multitronic (01J)
C18,Note #1: Coding is accepted after a specific Login has been carried out.
C19,Note #2: Special Coding 04499 is used for BFB Engine with 1LT Brakes and Multitronic.
C20,Note #3: After successful Coding the Steering Angle Sensor Alignment needs to be carried out.
;
;

The 17" Brembo coding will work also, with the reduced ABS anti lock sensitivity adaptation.

[seanf86]

So I should login using 09575 for my stock 15" wheel fn3 brakes then change coding to 04375 or 04575, The way I read when I searched is to login using a login code corresponding to what I was going to set the new coding to.

[diagnosticator]

Yes, correct. The login that must be done first, is kinda the reverse of the coding value.

[seanf86]

Yes, correct. The login that must be done first, is kinda the reverse of the coding value.

Now after reading this thread I'm confused http://www.audizine.com/forum/showth...eir-ABS-module post 24 says I need to figure out a login based off what I want my new coding to be, not the existing coding of the module. I don't remember the process I went thru last time I did this since the coding was 00000 on my module

[diagnosticator]

Now after reading this thread I'm confused http://www.audizine.com/forum/showth...eir-ABS-module post 24 says I need to figure out a login based off what I want my new coding to be, not the existing coding of the module. I don't remember the process I went thru last time I did this since the coding was 00000 on my module

The login can not be based on what you want the new coding to be since the module has no data inside to accommodate that. The new coding value is unknown to the module, so the login must be according to the coding ID of the module before it is recoded. After the module is recoded, then the new login will be according to the newly applied coding value.

I agree the information posted in the thread you refer to is confusing. In that case and in the case that the ABS module is uncoded, the login will be accepted regardless of the value used. The context of the two situations is different and therefore unclear, but if a module is already coded, then the login must be associated with the existing coding value, before the module is recoded. After the module is recoded, the login will change to the value associated the new coding value as applied.

[seanf86]

So I'm sitting in the car now, I've tried and tried to code for the fnr/hp2 front brakes and it will not take, the brembo coding will not take either, I have successfully got it to take the coding for the b6 312mm front brakes, after driving it feels a bit better so this is how I will leave it for now.

Thanks diagnosticator for all your help

[diagnosticator]

Now that the ABS is coded for FN3 16", consider trying to recode to FNR 16". Use login 09375 and coding value 04375. (Or, 04575 for Brembo 17").

[seanf86]

Now that the ABS is coded for FN3 16", consider trying to recode to FNR 16". Use login 09375 and coding value 04375. (Or, 04575 for Brembo 17").

I tried that as well, it would not take, I could code back and forth on the fn3 15" and fn3 16" but thats all it will take. I'm guessing my specfic p/n abs module does not support that coding, the suffix A p/n supercedes to M I think it is, if I have to replace the module again and I get one of those maybe it will take the coding.

[MikTip]

I was unable to code my ABS module for my B7 A4 brakes....as were others....

http://www.audizine.com/forum/showth...ght=coding+abs

[seanf86]

I was unable to code my ABS module for my B7 A4 brakes....as were others....

http://www.audizine.com/forum/showth...ght=coding+abs

Did you try coding for the 312mm front brakes? I found it stops on ice a bit better than when coded for the 288mm front brakes

[drjonez]

Yeeeeeeeeeeeeep. Good luck, I've been unable to recode my ABS for anything other than stock.

[texasboy21]

I started the process late last night, and something didnt go right. I am now in an ABS test mode, and will need to complete the test, in order to regain my ABS functionality.

[seanf86]

I started the process late last night, and something didnt go right. I am now in an ABS test mode, and will need to complete the test, in order to regain my ABS functionality.

That's the easy part drive down the street at 20km/h and turn wheel left 90deg then straight and right 90deg and abs light will go out and life is good

[texasboy21]

That's the easy part drive down the street at 20km/h and turn wheel left 90deg then straight and right 90deg and abs light will go out and life is good

Nice! I will try that in just a few. The code (that does not clear until the test is complete) is 01486 - System Function Test Activated.

[seanf86]

Nice! I will try that in just a few. The code (that does not clear until the test is complete) is 01486 - System Function Test Activated.

Yea after recode you have to do that once you do the steering angle calibration for the abs light to go out, before you start driving and press the brake pedal the esp light goes out then you do the test.

[texasboy21]

Yea after recode you have to do that once you do the steering angle calibration for the abs light to go out, before you start driving and press the brake pedal the esp light goes out then you do the test.

Here is the process for the test drive:

http://wiki.ross-tech.com/wiki/index..._Function_Test

Im off to try it!

[seanf86]

Here is the process for the test drive:

http://wiki.ross-tech.com/wiki/index..._Function_Test

Im off to try it!

Yup that's exactly what I followed last night when I did it

[diagnosticator]

I tried that as well, it would not take, I could code back and forth on the fn3 15" and fn3 16" but thats all it will take. I'm guessing my specfic p/n abs module does not support that coding, the suffix A p/n supercedes to M I think it is, if I have to replace the module again and I get one of those maybe it will take the coding.

Since everyone has had problems recoding the ABS, I will check my module coding again, it's been awhile, but IIRC, I was able to recode OK. I will verify the module PN as well.

[diagnosticator]

Try clearing the Vehicle VIN self learning values from the adaptation channel 081, then try and recode the ABS again. If anything is preventing coding for larger brakes, I bet it is the Component Protection in the ABS module and the stored VIN that is causing the problem with the recode. If this works allowing the recode desired, enter the value shown for Starting the Vehicle Self Learning after the recode is done. I don't believe the PNs of the ABS controllers is specific to the size of brakes installed, so that would not be the limiting aspect preventing the recode. If that was involved, there is no reason for the module to display all of the possible different engines, transmissions and brake sizes in the module software. The displayed options could be limited to only the choices applicable per engine trans and brakes, but that is not the case. If it is the case that the module won't accept the different coding options, and only accepts the as built choices, there is no reason to implement recoding the module at all.

A081,0,Component Protection (Vehicle Identification Number)
A081,5,Component Protection (Vehicle Identification Number)
A081,6,To Start the Vehicle Identification Number (VIN)
A081,7,Learning Process enter/save 46992 as new Value.

[texasboy21]

Success! I was able to recode the module from the stock 288mm to 312mm. I tried the HP2 and Brembo settings, but they would not take.

[seanf86]

Try clearing the Vehicle VIN self learning values from the adaptation channel 081, then try and recode the ABS again. If anything is preventing coding for larger brakes, I bet it is the Component Protection in the ABS module and the stored VIN that is causing the problem with the recode. If this works allowing the recode desired, enter the value shown for Starting the Vehicle Self Learning after the recode is done. I don't believe the PNs of the ABS controllers is specific to the size of brakes installed, so that would not be the limiting aspect preventing the recode. If that was involved, there is no reason for the module to display all of the possible different engines, transmissions and brake sizes in the module software. The displayed options could be limited to only the choices applicable per engine trans and brakes, but that is not the case. If it is the case that the module won't accept the different coding options, and only accepts the as built choices, there is no reason to implement recoding the module at all.

A081,0,Component Protection (Vehicle Identification Number)
A081,5,Component Protection (Vehicle Identification Number)
A081,6,To Start the Vehicle Identification Number (VIN)
A081,7,Learning Process enter/save 46992 as new Value.

I'll give that a try later tonight or tomorrow, so I just go into channel 81 and enter 46992 as my new value, what else do I do next? does it reset my coding to 00000? I've searched through my Bentley dvd manual and I cannot find anything on abs diagnostics and can't find anything else online. If there is anymore literature I should purchase for this car I'm all ears.

[diagnosticator]

I'll give that a try later tonight or tomorrow, so I just go into channel 81 and enter 46992 as my new value, what else do I do next? does it reset my coding to 00000? I've searched through my Bentley dvd manual and I cannot find anything on abs diagnostics and can't find anything else online. If there is anymore literature I should purchase for this car I'm all ears.

I was getting ready to try entering zero values in the VIN fields. (Waiting for my PC to recharge now,) I assume that is possible. If you enter 46992, that will just store the VIN of your car in 081 again. The goal here is to have the VIN fields stored with 17 zeros, or use 00000 as the saved new value,, then try the ABS recode to see if the coding desired will take with the Component Protection disabled with the VIN zeroed out.