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

rear diff (haldex)

dantheman1986 Dec 4, 2010

  1. dantheman1986

    dantheman1986 Member

    262
    0
    16
    right guys need someone that knows what their talking about when it comes to the haldex system. ive got an 2000 x reg A3 tqs and i have no 4 wheel drive. pluged the vag-com in an got this fault code:

    VAG-COM Version: Release 409.1-US

    Control Module Part Number: 02D 900 554 B
    Component and/or Version: HALDEX LSC ECC 0006
    Software Coding:
    Work Shop Code:
    1 Fault Found:
    01155 - Clutch
    04-00 - Mechanical Malfunction

    im guessing this means the haldex coupling is shot and i need a new rear diff right? is there anythin i can check or anythin else that could be at fault? there are no nasty noises or anythin coming from the diff, just what sounds like the abs goin mental when i spin the fronts.

    also this whill be the second diff ive gone through in 4 years!! not good. thanks in advance for your help
     
  2. bogard

    bogard New Member

    18
    0
    1
    Have you checked that the precharge pump is working ?
     
  3. dantheman1986

    dantheman1986 Member

    262
    0
    16
    bogard how do i check that?
     
  4. AudiS3-Turbo

    AudiS3-Turbo Member

    619
    27
    18
    yea and the connection's to the diff,you can activate the charge pump via vcds
     
  5. dantheman1986

    dantheman1986 Member

    262
    0
    16
    vcds is vag com right? i dont have the full version so i wont be able to do it will i?
     
  6. AudiS3-Turbo

    AudiS3-Turbo Member

    619
    27
    18
    yea if you use activation test you can run the pump,stick your head out the window as its not that loud to hear.

    Also as i said check your connections and redo the activation test to see if the pump is working,if all else fails then it does sound like a mechanical failure?

    Do you do the diff and haldex oils?
     
  7. AudiS3-Turbo

    AudiS3-Turbo Member

    619
    27
    18
  8. dantheman1986

    dantheman1986 Member

    262
    0
    16
    thanks guys didnt think i could the the activation test without a fully registerd version of vag com, ill give it a go tomorro, what noise should i hear? a constant buzzin of an electric motor? or just a quick buzz then stop?
     
  9. AudiS3-Turbo

    AudiS3-Turbo Member

    619
    27
    18
    it should last for as long as you run the test 5-10 sec cant remember mate and yea its a motor you can hear.
     
  10. dantheman1986

    dantheman1986 Member

    262
    0
    16
    sweet ill give it a go. if i was to remove the motor to test it, will i loose all the oil?
     
  11. AudiS3-Turbo

    AudiS3-Turbo Member

    619
    27
    18
    Ive never had one apart but as its a hydraulic pump i would assume so,if you can test the pump and its working but yet you cant operate it via vagcom then its going to be the haldex ecu/control unit.
     
  12. dantheman1986

    dantheman1986 Member

    262
    0
    16
    just tried operating it via vag-com and i cant do it with the un registerd version i have :(
     
  13. AudiS3-Turbo

    AudiS3-Turbo Member

    619
    27
    18
    bugger,no one close to you that could help you out?
     
  14. pj123

    pj123 Member

    307
    13
    18
    Have you checked to see if your earth strap has corroded? Connects the car to either the rear diff or the haldex unit, I cant remember which one it connects to but there are other posts about this being a common cause of failure of the haldex.
    Paul
     
  15. bogard

    bogard New Member

    18
    0
    1
    im not 100% sure but i think the pump should run with the ignition on.
     

Share This Page