ABS Module Issue - Traction control On ABS On and Handbrake light On

[mfdk]

In the last month or so i have had such a bad luck with ABS system that sometimes it just doesn't make any sense as what the hell is going on. It all started with intermittent ABS and ESP Light solid On when driving over 75mph but never under 70mhp and this was like a year ago. Once i turned the car off then i can drive for half an hour at above 75mph and eventually these two lights would come on and stay on until the car has been turned off (strictly above 70mph)

Fast forward, a month ago things got a lot worst, there are times when ABS and ESP light come on right after the ignition without driving and they would go off as soon as the car starts moving forward, there are times they would come on while driving. There is times where there are no lights on Dashboard but the ABS would kick in whilst coming to a stop at slow speed on dry summer weather.

First thing i did was to scan for codes and VCD showed 3 codes all related to speed sensors which i ended up replacing it but the issue did not get resolved, so i took my ABS module out and send it for repairs to BBA Reman, after getting back i no longer get the ABS kicking in but the Christmas lights never went away in fact i got one more Christmas light and that is the Handbrake Light.

Now i have a combination of ABS light, ESP light Solid On whilst Handbrake Light Flashing unless handbrake is engaged, this again happens a lot of times as soon as the car is turned on, there are times when ABS and ESP come on at start up and eventually the handbrake light flashing down the road whilst driving, this things its driving me crazy.

Here is what i realized;

When ABS Light and ESP light are On - i can't access the ABS module with VCD, it says cant connect to module controller

When ABS Light and ESP light are On with Handbrake light Flashing i can access the ABS Module and showing that three of my wheel sensors are deviant

Like i said i replaced all 3 sensors plus i sent out my ABS module twice out for repairs, I'm kinda speechless as what can it actually be...

Can anyone suggest something else...



Thanks

[a4kamila6]

I dont think you have 3 bad tone rings but you can try removing axles and cleaning the rings. Sometimes they get deformed and the gaps get larger, sometimes they break.

Im curious as to why you still have this issue after abs module rebuild which is usually the culprit. They say the mechanical portion doesnt tend to fail

[mfdk]

I dont think you have 3 bad tone rings but you can try removing axles and cleaning the rings. Sometimes they get deformed and the gaps get larger, sometimes they break.

Im curious as to why you still have this issue after abs module rebuild which is usually the culprit. They say the mechanical portion doesnt tend to fail

I have taken all three out, cleaned them up and put back together and i can understand if the lights come up while the car is in motion, but 99% the issue pops up right after the cart starts up without moving.

I'm lost here, but as you can see on the attachments there are times where VCD cant communicate with abs module and maybe the repairs weren't adequate..

[rollerton]

You need to recode the ABS module when you get it back from being rebuilt. There's a decent chance that you didn't get your original one back or that it was 'tested' and put back to 00000 coding after being rebuilt. That's why the lights are on, but why can you not connect is a different story and ...I don't even know.
Kind of shitty way to resolve it, but you sort of need to swap that module into another car to see if the module is messed up or if you can COMM with it in another chassis. Or get another ABS module to test in your car.
If the ABS module was reset then you need to code it and adapt steering angle sensor also. Thus the warning lights. I'd probably at least attempt disconnecting battery, disconnect ABS module, then start car and clear ALL codes in ALL modules w/ ABS disconnected. Then, power down, disconnect battery, reconnect ABS module and see if you can connect.
If that works then clear errors and be ready to recode it and to the steering angle calibration.

[mfdk]

You need to recode the ABS module when you get it back from being rebuilt. There's a decent chance that you didn't get your original one back or that it was 'tested' and put back to 00000 coding after being rebuilt. That's why the lights are on, but why can you not connect is a different story and ...I don't even know.
Kind of shitty way to resolve it, but you sort of need to swap that module into another car to see if the module is messed up or if you can COMM with it in another chassis. Or get another ABS module to test in your car.
If the ABS module was reset then you need to code it and adapt steering angle sensor also. Thus the warning lights. I'd probably at least attempt disconnecting battery, disconnect ABS module, then start car and clear ALL codes in ALL modules w/ ABS disconnected. Then, power down, disconnect battery, reconnect ABS module and see if you can connect.
If that works then clear errors and be ready to recode it and to the steering angle calibration.

Alright, i will give that a try today and post an update.

[mfdk]

You need to recode the ABS module when you get it back from being rebuilt. There's a decent chance that you didn't get your original one back or that it was 'tested' and put back to 00000 coding after being rebuilt. That's why the lights are on, but why can you not connect is a different story and ...I don't even know.
Kind of shitty way to resolve it, but you sort of need to swap that module into another car to see if the module is messed up or if you can COMM with it in another chassis. Or get another ABS module to test in your car.
If the ABS module was reset then you need to code it and adapt steering angle sensor also. Thus the warning lights. I'd probably at least attempt disconnecting battery, disconnect ABS module, then start car and clear ALL codes in ALL modules w/ ABS disconnected. Then, power down, disconnect battery, reconnect ABS module and see if you can connect.
If that works then clear errors and be ready to recode it and to the steering angle calibration.

Alright, after spending couple hours yesterday trying to re-code the ABS module i have come to a conclusion that the ABS module is faulty and here is why;

9 out of 10 times VCD fails to connect to the ABS module and when this happens the ABS module is making a continuous clicking noise, and if i manage to connect to the module it will not accept my Loging number but it will let me input the Coding but the actual Soft coding will not change. Even though it lets me input the Coding number it will not let me input the 41068 which enables the angle sensor and steering wheel calibration.

Here is the interesting part, if i do the Coding and clear all the codes the lights will go off for as long as the car is running buts once turned off they will come on at next start up. I also realized that whenever i manage to connect to the ABS Module it shows Soft Coding "00031" to me thats does not seem to be right and of course my Coding its not working even though it accepts,

I'm just going to buy a used working module and go from there, when i sent out the module for second time they told me they don't see anything wrong with it and that its working fine so I'm little confused.

[kruftindustries]

When I got my car it had 3 beeps, the guy that sold it to me had taken the instrument cluster out and covered the ABS light in black sharpie but I finally figured out it was the ABS module because I could barely connect to the ECU, some other modules I knew I had in the vehicle would not respond in vcds and finally on a moonless night once I saw part of the "A" of the indicator. I pulled the sucker out, hacksawed it in half and found 2 of the aluminum bond wires that go from the plastic body to the ceramic substrate where the chips and mosfets are were disconected, either from vibration or current draw. Soldered some magnet wire in their place, epoxied ABS module housing back together and suddenly I could communicate with the ABS mudule, radio and the central locking pump reliably every time.

Long story short, the aluminum bond wires in the ABS module are VERY difficult to see breaks in, and they are small. I am willing to bet your wires make contact until the module gets shaken at highway speeds and then your issues show up. If you're handy with a soldering iron, I would pull it apart and try yourself (there are posts with pictures on the procedure if you google enough). If not, replacing the module is your best bet

[mfdk]

I need your help guys, so after failing to communicate with my original rebuilt ABS module i went ahead and bought a used but the exact same part and I'm having issues Login to ABS Module. As soon as I installed the ABS i bought used all the Lights and error codes cleared by itself ..fantastic but now i cannot login, no matter what i do it will not accept my Login code generated using Rosstech Wiki. I went for a test drive and every time i gradually/slowly come to a complete stop the ABS kicks in (No error codes) and I'm assuming this is because i cannot Login nor can i calibrate the steering wheel sensor and what not.

Any suggestions are welcome

VCD shows Softcoding 00021 and WSC 00028

car specs

Audi A4 B5 V6 2.8L FWD
6 cyl gas
Brake 1LB
Automatic 01VZ

According to wiki my Login should be: 09597 and Coding: 04297

It just won't accept the Login Code,

Thanks
MJ

[mfdk]

Just wanted to update this thread just in case someone else run into the same issue, even though i couldn't Login into the used module i bought it still got rid of all the Christmas lights but still had abs kicking in while coming to a complete stop. So i went ahead and took out all 4 speed sensors one by one and cleaned them up, test drove the car and now everything is working fine.

So basically my original ABS module was defective even after sending out for repairs twice, they claimed the first time it was defective but when i sent it out for 2nd time they told me they don't see anything wrong with it but they agreed to give me a refund.

Thanks

[4A Play]

Same exact issue here, i have an excellent euro junkyard by my house, how do I know which used ABS modules will work for me?

Do I need to match exact part numbers or the last digit in the number which I have also heard.

[mfdk]

Same exact issue here, i have an excellent euro junkyard by my house, how do I know which used ABS modules will work for me?

Do I need to match exact part numbers or the last digit in the number which I have also heard.

I have not be able to solve my issue yet, replaced the ABS sensors but i still get intermittent abs pulsating (activating at low speeds), mine may actually be related to my Autozone CV Axle or just a bad abs ring.

As far as the parts, i would strongly suggest you match the whole part number.

Are you getting any codes related to the abs system at all..!

[4A Play]

Not a single code at all. That's the issue. Just a "rough road" code.