98 S-70 GLT; ABS & Traction control lights come off and on.....

Discussion in 'Volvo S70' started by Robie, Oct 25, 2004.

  1. Robie

    Robie Guest

    My 98 Volvo S-70 GLT, has a problem with the ABS and Traction contol
    system, turning on and off lights. When it either turns on or off, I can
    hear the noise of the abs motor and feel the brake pedal pulsate, when it
    makes this noise. I understand that their is an epidemic problem with the
    ABS computer, that cost around 600.00. I don't have 600.00 now for that
    computer. I wonder why it keeps turning off and on. It sounds as if it has
    a loose connection or maybe a loose solder connection. Has anyone out there
    had similar problems, sure would like to hear how you have repair you car.
    I dont want to get a used one from the salvage yard im afraid I will get
    one with the same problem. I appreciate any comments from anyone who can
    assist..Thanks Robie
     
    Robie, Oct 25, 2004
    #1
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  2. Robie

    OBD Guest

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  3. Robie

    volvoguy Guest

    The problem you discussed is very common and very expensive.
    The problem is caused by a broken solder joint. You could try to
    dissassemble the module and repair it but I doubt the repair you last very
    long. Just know that the ABS and /or Tracs may not work when you really
    need it.
     
    volvoguy, Oct 26, 2004
    #3
  4. Robie

    Bob Noble Guest

    There is another possibility . . .

    Starting with the Right Rear wiring (the usual culprit, as I recall),
    check connection and condition on wiring in the motion sensing system.
    This is the system that reports the rate of rotation to the on board
    computer and to the dread ABS Control Module. An interrupted circuit
    (usually intermittent) in this system may report that a wheel has a
    differing (usually slower) speed when the brakes are applied - thus
    operating the ABS process.

    Since just dirt is enough to cause problems here, it's surely worth the
    effort. My friendly Dealer comments that their perpetual fears of
    subsequent litigation virtually force them to replace the Module, even
    when such an on/off problem is the clear choice for cause. Ain't
    lawyers wonderful?!

    bob noble
    Reno, NV, USA
     
    Bob Noble, Oct 26, 2004
    #4
  5. Robie

    Robie Guest

    Thanks Bob for your advice. Much appreciated..will try these things. Larry
     
    Robie, Oct 28, 2004
    #5
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