Re: When to keep quiet (was about ABS Sensors) **Rob

["Rob Levinson" <always_coca-cola@xxxxxxx>]

>From: Atkin11J@domain.elided
>Subject: RE:When to keep quiet (was about ABS Sensors)
>So my 1985 535i (first year) is starting to turn the ABS light on anytime I
>exceed 80 mph. It first happened after a rather extended run at about 115.
>When I did struts on the car I was unable to remove the ABS sensors for
fear
>of damaging them. I have never played with ABS before, the system works
fine (
>as we have ice in Detroit now). On the freeway I shut the car off an
restart
>and the light goes off until I run 80+ and then it illuminates, where do I
>start?


    Your ABS malfunction is probably not sensor-related.  The ABS works by
counting teeth on the hub, the ABS sensors send a signal each time a tooth
passes.  The sensors send a "bad" signal which shuts down the ABS system
entirely (when the yellow light is on).  This bad signal can be caused by
dirty or bad hub-teeth.  They can get dirt stuck in them or, worse yet, can
corrode.  The corrosion wears the teeth down so they don't signal properly.

    If there is a correlation between your 115mph run (your car will do at
least 134mph, trust me) and your ABS malfunction, it may be dirt in the
teeth.  Rear hubs can be seen from underneath the car without taking the
wheels off, spray them down with some brake cleaner.  Front hub access
requires removal of the wheel.

- - Rob Levinson
FOR SALE: '85 535i Turbo and '86 535i -->www.bubbaclub.com/4sale.htm

www.shortshifter.com

------------------------------