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ABS module on the abs pump

Discussion in 'A4/S4 forum(B5 Chassis)' started by sun and kath, Jan 12, 2010.

  1. sun and kath
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    sun and kath Member

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    [Jan 12, 2010]
    Any one tried fixing the abs electronics on the abs pump? on the net i found a passet guy who open his up and re soldered where is saw black caused by some arcing.

    My Abs light on my s4 comes in intermittantly and the faut code is:

    1 Fault Found:
    00283 - Front Left ABS Wheel Speed Sensor (G47)
    30-10 - Open or Short to B+ - Intermittent


    thing is if i switch the ignition on and stand looking at the engine bay i can hear a electrical "crackle" at the abs module . like a litte arcing noise, that lasts no more than a second - starts as the ignition is switchen on then stops.

    Deliema is shall i splash out on a new wheel sensor - when that may be okay . or shall i risk damage to the abs modue by taking it off and opening up?

    Any suggestions?

    (I thought about swapping the abs sensor left and right, but they appear to not come out easy and ofter get wrecked coz they need heat to remove.)
    :tapedshut:
    #1
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  3. ian52
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    ian52 2000 a4 1.8tqs-yellow

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    [Jan 12, 2010]
    I would send it away to get checked out. Its very easy to wreck it trying to fix it yourself.
    #2
  4. Blue_Thunder
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    Blue_Thunder Active Member

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    [Jan 12, 2010]
    It's easy enough to remove the ABS ECU and open it up yourself for a look using a sharp blade. If you found it to be ok, you could seal it up again and refit.

    Doubt it will be arcing within the ABS module, simply because the connections are way too small. Sure you're not mistaking the sound of the throttle body adaptation for arcing?
    #3
  5. sun and kath
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    sun and kath Member

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    [Jan 13, 2010]
    its not the "wizzing" that lasts a second or two at the throttle body, (in the middle at the front). this noise is at the abs brake distribution thing

    does a healthly car make a nosie here for a second when ign is switched on?
    #4
  6. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Jan 13, 2010]
    When they fail, they just fail.

    Once the wire or whatever it is burns out, you'll get a permanent light and no ABS.

    Looks more like a sensor fault to me.

    Is the crackle possibly not just some relays inside the abs unit engaging?
    #5
  7. mwarrey
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    mwarrey Member

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    [Jan 13, 2010]
    Dont think thats the ecu, sounds like a sensor.
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  8. Blue_Thunder
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    Blue_Thunder Active Member

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    [Jan 14, 2010]
    I should have pointed out, when my ABS ECU knackered I couldn't connect to it on Vagcom anymore. The fact you are getting a sensor error does tend to suggest it is the genuine cause of the fault.
    #7
  9. sun and kath
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    sun and kath Member

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    [Jan 14, 2010]
    thanks guys i'll leave the module alone for now and tackle the sensor
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