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ABS / Caliper question 200 1993

posted by  Jac912 on  Mon Jun 28 11:59 CST 2010
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last visit: Sat Oct 18 10:43 CST 2014
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Daughters '93 with ABS. I have replaced all pads and front rotors and the brakes act as if the ABS sensors are not working properly but look clean. Coming to a stop they lock up and release below 5mph in the way that those of us that hate ABS brakes know so well. This is on dry level pavement. I suspect that I have a rear caliper hangng up or sticking ... would a rear caliper malfunction affect the sensors? And if so in the manner I have described? BTW ... I temorarily removed fuse #7 (ABS and Brakelights) to help troubleshoot with no positive result. Thanks all ...








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    ABS / Caliper question 200 1993

    uid 4846's pic
    posted by  JohnMc on  Mon Jun 28 12:40 CST 2010
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    last visit: Thu Oct 23 07:42 CST 2014
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    Rear hanging caliper wouldn't do that, unless it was actually locking a wheel and dragging it. The rear ABS channel (3 channel ABS on a 240, not 4) reads off the differential sensor - same one as feeds the speedometer. If the speedometer is acting normally, you can pretty much rule out shenanigans with the rear sensor.

    Which leaves the fronts. If you've taken them off and cleaned the clinging rust bits off, then one might still be bad. I diagnosed a bad on on my old Jetta once by simply reading the resistance across it with a multimeter, but only after it got so bad it was not working anymore.
    --
    '63 PV544 rat rod, '93 Classic #1141 245 (now w/16V turbo)







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