abelw44 Posted January 28, 2018 Share Posted January 28, 2018 Afternoon all, My ugly heap of German metal recently decided it didn't want to have ABS anymore. In an attempt to remedy this, I replaced all of the ABS sensors with new ones. No change, ABS light still on. And so, some internet research having been done, I realise that what I need to do is get the control unit repaired. The unit is made by Bosch, with a model number of: 0 273 004 281 I was wondering whether any of you wonderful autoshite folks knew of a decent place to send the unit to get it repaired? I can't seem to find one in the UK... Thanks,abelw44 Link to comment Share on other sites More sharing options...
cobblers Posted January 28, 2018 Share Posted January 28, 2018 Bba reman do abs modulators Link to comment Share on other sites More sharing options...
Parky Posted January 28, 2018 Share Posted January 28, 2018 Dig out the VW Corrado episode of "Wheeler Dealers" They had a similar problem and Mike took the unit to BBA as mentioned by cobblers. Will give you an interesting oversight of the sort of things they will do to your unit. http://www.bba-reman.com/gb/index.aspx Link to comment Share on other sites More sharing options...
abelw44 Posted January 28, 2018 Author Share Posted January 28, 2018 Fair enough, just sent BBA and enquiry, as the model number for my part is not on their site. Thanks for the quick replies Parky and cobblers! abelw44 Link to comment Share on other sites More sharing options...
twosmoke300 Posted January 28, 2018 Share Posted January 28, 2018 Have you had this code read at least ? Or did you just change all the sensors for fun ? overrun 1 Link to comment Share on other sites More sharing options...
SiC Posted January 28, 2018 Share Posted January 28, 2018 ^^ What he said. Get the codes read before you go any further. Otherwise you'll be shooting in the dark. Depending on the year it's not unknown for the valve block to fail. Hell it could even be just the brake switch! Link to comment Share on other sites More sharing options...
omegod Posted January 28, 2018 Share Posted January 28, 2018 Looks remarkably similar to a Vaux Omega ABS ecu, I wonder how different they all are internally ! Link to comment Share on other sites More sharing options...
twosmoke300 Posted January 28, 2018 Share Posted January 28, 2018 ^^ What he said. Get the codes read before you go any further. Otherwise you'll be shooting in the dark. Depending on the year it's not unknown for the valve block to fail. Hell it could even be just the brake switch! Or a broken wire on the loom , blown or cracked fuse ( cracked fuses common on vag stuff) SiC 1 Link to comment Share on other sites More sharing options...
twosmoke300 Posted January 28, 2018 Share Posted January 28, 2018 Oh and what model / year is it ? Link to comment Share on other sites More sharing options...
Guest Posted January 28, 2018 Share Posted January 28, 2018 https://www.ebay.co.uk/itm/VW-AUDI-A6-ABS-PUMP-BOSCH-0-273-004-281-/322976261484 https://www.ebay.co.uk/itm/Audi-A4-ABS-Pump-1-9-TDI-0-265-216-559-0-273-004-281-/152601939767 Link to comment Share on other sites More sharing options...
twosmoke300 Posted January 28, 2018 Share Posted January 28, 2018 Double top , 20 , Bull ! Parts darts winner Dave_Q and Barry Cade 2 Link to comment Share on other sites More sharing options...
fraybentos Posted January 29, 2018 Share Posted January 29, 2018 Bba are very hit and miss used unit off eBay all the way imo Link to comment Share on other sites More sharing options...
dieselassist Posted January 29, 2018 Share Posted January 29, 2018 presumably you've checked the ring for knocked off/incomplete/gummed up teeth?? What year is the Audi? I broke a b5 ages back that I engine raped an otherwise okay car for, there was a bit of hammer enquiries wise for both the ABS block n airbag module, but the part no' for the ABS block bit never matched theirs ... ...a mate of mine had a B6 n had ongoing ABS issues..... after fitting a second hand block n sensors over n over to achieve an NCT test; dash light would always light up again a few miles down the road after a VAGCOM computa bleed procedure ; turned out to be a frayed wire a bit before the multiplug into the block unit - a €0.50 fix that cost him a few hundred 'doubles round the board' parts darts... twosmoke300 1 Link to comment Share on other sites More sharing options...
SgtWilson Posted January 29, 2018 Share Posted January 29, 2018 http://www.ecutesting.com/ gets Honest John's vote. Never used them myself. Link to comment Share on other sites More sharing options...
abelw44 Posted January 31, 2018 Author Share Posted January 31, 2018 Have you had this code read at least ? Or did you just change all the sensors for fun ? I kind of worked on the assumption that it would be the sensors as I had them out and stuff whilst working on the brakes and wheel bearings. Having the codes read is reasonably expensive though, isn't it? Some reading on the internet suggests that abs modulator failure on a 2000 audi a4 b5 avant is fairly common. Link to comment Share on other sites More sharing options...
cobblers Posted January 31, 2018 Share Posted January 31, 2018 Oh jees read the codes before putting parts on! Ebay knockoff VCDS kit is about £15 and will tell you why it's bringing the light on, or a local garage will probably plug it in if you turn up with a few tinnies, its minutes of a job. SiC and twosmoke300 2 Link to comment Share on other sites More sharing options...
twosmoke300 Posted January 31, 2018 Share Posted January 31, 2018 I kind of worked on the assumption that it would be the sensors as I had them out and stuff whilst working on the brakes and wheel bearings. Having the codes read is reasonably expensive though, isn't it? Some reading on the internet suggests that abs modulator failure on a 2000 audi a4 b5 avant is fairly common.Good grief! Assume makes an ASS out of U and ME Link to comment Share on other sites More sharing options...
Bren Posted January 31, 2018 Share Posted January 31, 2018 Would sooner spend £70 on a diagnostic than waste hours of my life I would never get back and still be none the wiser. twosmoke300 1 Link to comment Share on other sites More sharing options...
twosmoke300 Posted January 31, 2018 Share Posted January 31, 2018 Also did you set the sensor air gaps ? iirc they slide in on a stainless sleeve and are adjustable Link to comment Share on other sites More sharing options...
overrun Posted January 31, 2018 Share Posted January 31, 2018 Link to comment Share on other sites More sharing options...
The Reverend Bluejeans Posted January 31, 2018 Share Posted January 31, 2018 What year is the Audi? It's a red one. twosmoke300 1 Link to comment Share on other sites More sharing options...
The Reverend Bluejeans Posted January 31, 2018 Share Posted January 31, 2018 Here you go: https://www.ebay.co.uk/itm/ABS-Hydraulikblock-VW-PASSAT-TDI-3B-0265216559-8E0614111AB-0273004281-0130108046/122937894943?hash=item1c9fab681f:g:HdUAAOSwwmlZgOPp Link to comment Share on other sites More sharing options...
SiC Posted January 31, 2018 Share Posted January 31, 2018 I kind of worked on the assumption that it would be the sensors as I had them out and stuff whilst working on the brakes and wheel bearings. Having the codes read is reasonably expensive though, isn't it? Some reading on the internet suggests that abs modulator failure on a 2000 audi a4 b5 avant is fairly common. Get the codes read ffs. You've spent more in throwing parts at it already than a code scan. Do you have an Android? If so, there are apps that will read the ABS codes (e.g. https://play.google.com/store/apps/details?id=com.voltasit.obdeleven&hl=en_GB ) with a cheap bluetooth adapter (e.g. https://www.ebay.co.uk/itm/ELM327-V1-5-Mini-With-PIC18F25K80-Bluetooth-OBD2-Scanner-Diagnostic-Code-Reader/252848281817 - that particular one, if you want a ELM327 from a different seller paste here first). Link to comment Share on other sites More sharing options...
SiC Posted January 31, 2018 Share Posted January 31, 2018 This should work on your age Audi: https://www.ebay.co.uk/itm/Genuine-Ross-Tech-Dual-K-VAG-HEX-CAN-VCDS-Diagnoatic-cable-Unlimited-vins-OBD2/122941235508 Link to comment Share on other sites More sharing options...
abelw44 Posted January 31, 2018 Author Share Posted January 31, 2018 Good grief! Assume makes an ASS out of U and MEI stand corrected, I did invest in a cheap and nasty VAGcom unit, but the item that came had a plug that was about 1mm too big for the socket on my car. Would sooner spend £70 on a diagnostic than waste hours of my life I would never get back and still be none the wiser.Well, it makes sense in some ways, but equally BBA Reman will take the modulator, check for faults and either repair it or return it with a refunded fee if the don't find a fault - so that way either it gets fixed and you only pay for the repair, or it's not the broken part and you pay nothing. I am a total novice to all of this, however, and I'm sure you guys are more learned in the ways of automotive shite, so I will try to get the codes read one way or another. Thanks,abelw44 Link to comment Share on other sites More sharing options...
Bren Posted January 31, 2018 Share Posted January 31, 2018 Ring around and see who is most competitive. Sadly some will only tell you what codes are while some will do an hours fault finding in the price. Link to comment Share on other sites More sharing options...
abelw44 Posted January 31, 2018 Author Share Posted January 31, 2018 Ring around and see who is most competitive. Sadly some will only tell you what codes are while some will do an hours fault finding in the price.Fair enough, I will get started! Thanks,abelw44 Link to comment Share on other sites More sharing options...
SiC Posted January 31, 2018 Share Posted January 31, 2018 Where about's in the country are you? Someone maybe close on here to give you a quick code scan. Link to comment Share on other sites More sharing options...
abelw44 Posted February 1, 2018 Author Share Posted February 1, 2018 Right then, After messing around with the porrly designed connector that shipped with the cheap scanner, I got it to fit. Having scanned the brakes and ABS for fault codes, the only fault it finds is open circuit on the rear right abs sensor. On the basis that I've replaced them all, is this likely to be a wiring issue? Dodgy connection somewhere? Or am I likely to have damaged it by being a cackhanded mechanic when I fitted it? Thanks,abelw44 Audi Brakes Scan results.pdf Link to comment Share on other sites More sharing options...
SiC Posted February 1, 2018 Share Posted February 1, 2018 Yes broken wire, sensor damaged, or duff connector. Do you have any of the old sensors left? Try plugging it in, clearing the code and see if it comes back. Link to comment Share on other sites More sharing options...
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