Same thing on a 2002 Passat. ABS light on constantly and red brake light intermittent and three beeps. Have done a lot of research on this issue. First proceed from the easiest to the more complex checks. 1- Enough brake fluid. 2- Check voltage and continuity in brake fluid reservoir sensor (clean it). 3- Check all the fuses related to ABS (replace accordingly). 3A- Verify your battery delivers the right voltage to the ABS/brake system (more than 12.4v ignition off), clean ground connectors. 4- Scan or have your car scanned with a Vagcom unit or any device capable of ABS reading (if a message of "no communication appears" bad news, abs module is kaput or wiring issue). 5- Clean and check ABS sensors in each wheel (use a voltmeter) also check wiring continuity. 6- Inspect the tone wheel teeth (sometimes there's dirt, rust or a significant wear; clean/replace). 7- Remove and check ABS electronic module. There's no need to detach the hydraulic side (no fluid mess). Inspect the wiring and connectors. After my extensive search and talking to different specialised technicians, one of them from Bosch, told me these parts are programmed to fail at due time. Meaning you have to replace them yes or yes. A new unit for my car is around $1,200 usd. You can look for a second-hand unit at a junk-yard (around $300 usd). If so, you will need the old one so they can do the proper coding after replacement. Without coding its the same as if you did nothing; you will then need to take your car to a Vagcom equipped repair shop and may even come with the hydraulic unit as a whole, so full brake service here. This happens no matter which brand of electronic module or car manufacturer you own. *Note: There are some specialised service centres in the U.S. where they rebuild your module. You just remove the part from your car and send it over to them. Google it and some centres may appear. Some people have found some very fine wires (thinner than human hair) detach inside due to vibration. The inside is covered by a special gel so it is almost impossible to repair it yourself, besides being a highly specialised welding process of two different metals. I have known some people tried the help of jewellers to repair micro-cracks and use their expertise in metal micro-welding. It's a shot in the dark. For security sake you'll be better off with a new one (if you can find the part), rebuild your current module or buy a second-hand one. Some folks will tell you if you can't drive without ABS, probably you shouldn't have a car at all! Truth is we have to go through vehicle inspections and our life is on the line, specially on wet and icy roads. Not all of us can be a Raikkonen or a Hamilton 🏎 Be safe.

Well done!! That's diagnosing without skipping steps and really helps me and others properly use test lights (for both polarities) and multi meters! Can't wait to use those methods tomorrow on my Passat with the same issue of no comms to the ABS. Many thanks!

Good, quick diagnosis. Tough pulling the trigger on a module like that, without thinking you might have missed something.

Nicely done. I know it takes a few minutes to scope the bus, but a tradesman knows his tools, and the only way to do that is to use them regularly.

Another good video from Positive Lead Diagnostics! Well done Tom! 👍

Modules, modules, you're getting them left and right! Well done and thanks!

GREAT VIDEO straight to the point just the way it needs to be , please keep them coming and thank you very much .

So the ABS module lasted 17 years, I'm impressed!

Excelent video.i like the way he explanation. Simple and effective. Few of this videos ..thanks man well done

Thanks for bringing us along Tom. I do enjoy the PICO scope addition, thanks.

Great content...again something that initialy looks complicated is sorted with a logical aproach

This applies to the Audi TT thanks

Nice video Tommy. I also liked the Pico bonus 😉

Thanks for the video! liked the Pico hook up at the end. Not necessary but good to see.

Thank you Tommy. Good job. Your doing great. Really appreciate you.

great video very professional and well organized.

Superb young man a very good video on this unit, Thank You

Well done and very informative young man.

FWIW its either a shorted Data/signal line Choke or a fried CAN SMD chip that is responsible for hand-shacking between the ABS MCU and the rest of the system MCUs, i will lean towards the 2nd guess its just a common failure on theses units Good job Tom keep it up

Seeing fewer and fewer of these issues with these cars... were also seeing fewer and fewer of these cars. =)

Nice!!! Love these videos.

Great work. Nice simple tests with the test light

nice video!! for a brief moment i tought you had the same issue as i... i dont have power to pin 15 , but i also dont have any blew fuse. strange

High quality diagnosis!

Wonder what goes bad inside the module ? Don't look inside during working hours. Thanks for sharing and easy to follow along.

Amazing video thank you.

Good video, if I’m not getting a reading on the two ground pins, any ideas where these two wires trace back to?

Good diagnosis big thumbs up 👍

Excellent job, thanks for sharing.

the vw jedi..... good work. wonder who the thumbs down was

Awesome video!

pop off abs module cover and check ground pin with ground on scheme, its common thing, just solder ground two wires to cooling rad and done.

Excellent job

Do you have a video on the module recoding element?

Thank you for interesting videos. Keep it up! /David, Sweden

It would have good to see the can signal with the module plugged in

I had the same problem with my 2000 Passat. Sent ABS model for repair, less than $100. Only needed to send electronic side of module.

Mu abs light is on but i did diagnose no codes check all wires so i assume module dead??

real pro, great help, thanks

tom can I make a suggestion. I also live with these current flow diagrams being an audi tech. I find when printing the current flow off set the printer to "landscape" layout and it prints of in a better format 'uses more of the paper on the diagram rather than the wording which is much easier to see and also staple them together like a book. cheers for listening. I'm a big fan of Paul D and also started following yourself. cheers

LO MAXIMO MI AMIGO

great video

Thanks man, this was a great and instructive vid. Looks like the same absmodule as in my sons Impreza, GD9 2002, also a Bosch.....question: were do you find your wiring-diagrams?

Thanks Tom for share ☺

great video thanks a lot

I have all voltage and groud but i dont have the orange cable populated

nice video but where do we get the wiring diagram and specified values like resistance?

Well done, ty

Oh my favorite money maker for the past 12 years

Hi Tom, finally you get a chance to call the ABS module, but I have a question: for an ECM, when powers and grounds are OK, but no comm., there is also possibility of a shorted 5V ref. line. Is this also possible with the ABS module, does it feed any sensors, relays, solenoids, etc. via a current-limited supply? Can this be seen from the wiring diagram/notes? Thank you!

Where would a guy find the same information for a 2006 Audi A4. I'd like to test the wiring before just assuming its the Modul. PS. Great Video, buying a test light!

Hello sir nice info ...y question is what if we get 120 ohms

Great video.. Wondering if u can test from abs fuse ?

I can't get to clear my abs break modules

I am not able to communicate with dashboard and central electrics cluster in my audi a4 b7. I tried both with VCDS and Obd eleven both threw communication error. any tips on where to check?

great tips your voltmeter like scanner danner's one hhhh where do you got the abs wiring diagram ?

I got a 2006 Touareg with a 4wd module not communicating. Powers + grounds to it are ok. Resistance at ecu pins 58+60 is about 60 ohms. Alldata says resistance should be 120 ohms. Do you think the ecu is bad? I got 12 other modules not communicating as well.

Hello sir Iam having problem with bmw 325i no comm to abs module any advice ..thanking ..

Good info as always thanks for sharing really enjoy ur video specially the one with no comm one question where did you connect to check the the terminating resistance . cheeeeeers

I tried to scan my neighbors 2003 Beetle, same issue. It worked 3 days ago so I'm not sure what's going on.

also tom can you tell me where you got the print out of the checks that you had regarding the ABS module? was it from ELSA ?

From where can i get that wiring diagram?

So, i had the same issue with a newer vag model,2010 seat leon. As soon as the cold season hit, abs started acting up. I pulled out a full module(pump included) from a scirocco (same part number). The car worked fine until the next cold season began. Same problem. Can anyone help? Did the customer owning the car ever come back?

Does the CAN BUS always have the Terminating 120 ohm resistors regardless makes, models ?

What about the other side of connector that is in contact with the module pins??

where can i find that packet

What would it mean if there is no resistance on the orange wires? Would this explain an internal module memory error?

what happened to the verus Tom? you've not been using it for a few videos now

great video can you please tell me where you got the data on the resistance etc as i have the same wiring diagrams but cant seem to find the data many thanks

That lamp sucks more electricity than that ABS pump 😛

Im having this issue with my Touareg going to test the resistance if that’s good I guess the modules gotta go

Hi What if the resistance is not within the specs???

Can u help me out have all good power and grounds.but my oms are 160

in mercedes truck i check pin out of can bus and they lead me to transistors inside ABS then i change them 80% works fine 😂

Hello I was able to solve this problem I have the same problem on my vw passat of the year 2000 What was the solution?

That's not a 2001

ref

omg that’s just to much not the video the module shit i just want the lights to go off lol