1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Brake pedal pulsating after installing repaired ABS module

Discussion in 'A4/S4 forum(B5 Chassis)' started by PelicanBlue, Apr 28, 2012.

  1. PelicanBlue

    PelicanBlue New Member

    Joined:
    Mar 19, 2012
    Messages:
    22
    Likes Received:
    0
    Hi all

    Just received my ABS module from ECUtesting in Derbyshire, UK.
    Yesterday upon installing, i was thrilled to see the faults were clear and my LCD now reads "OK" upon startup.

    However the brake pedal pulsates violently upon braking- at low speeds too.

    i would suspect the sensors as the ABS module has been faulty for a few years and the PO did not repair it.

    what are your thoughts?
    any links to DIYs will be appreciated.
    i dont yet have VAG COM but am shopping a cable.
     
  2. Google AdSense Guest Advertisement



    to hide this advert.
  3. S4_dan

    S4_dan Fire up the Quattro!
    VCDS Map User

    Joined:
    Jan 5, 2006
    Messages:
    2,285
    Likes Received:
    131
    Appears to be common on B5s. Both of mine did this and I put up with it. Check the rear reluctor rings, most likely cracked or full of crud. Be very careful if you try and remove the abs sensors. They get stuck if been in a long time, break easily and cost a small fortune to replace.

    Dan
     
  4. adidasandy

    adidasandy Member

    Joined:
    Apr 23, 2006
    Messages:
    271
    Likes Received:
    3
    LOL just bought a sensor today and it cost £164 with 10% off from Audi but includes the brass holder so be very carefull.
    Andy
     
  5. PelicanBlue

    PelicanBlue New Member

    Joined:
    Mar 19, 2012
    Messages:
    22
    Likes Received:
    0
    you lot are really scaring me ;)

    thanks will jack her up once again and get my hands dirty this afternoon. wife permitting :p
     
  6. aragorn

    aragorn "Stick a V8 in it!"
    Staff Member Moderator VCDS Map User

    Joined:
    Jan 30, 2008
    Messages:
    16,695
    Likes Received:
    477
    sensors are on ebay for about 15quid and they work fine!

    It could be a bad sensor, incorrect airgap, or broken reluctor.
     
  7. PAULF

    PAULF Active Member
    VCDS Map User

    Joined:
    Jan 27, 2011
    Messages:
    685
    Likes Received:
    61
    Looks like you found the fault then.

    Well done!
     

Share This Page