Why do my Antilock Brakes (ABS) trigger EVERY time I stop?

(2010-05-30 16:26:12)

1. Tom O Says: I have a 96 Audi A4 quattro 2.8 V6. Every time I come to a stop (2 mph or lower) my abs triggers for a few seconds. I hear the solinoid/s firing going "ERRRRRRR" and feel it in the pedal. I have a decent amount of automotive experience and the only thing I can think of is the fact that I have one mis-matched tire on the car. Yet I highly doubt the suttle difference is enough to tell the wheel speed sensors that that tire is spinning a different speed. I doesn't hurt anything or effect drivability but it's getting annoying and I'm tempted to just disconnect my abs. Any ideas?

2. LeAnne Says: Carefully inspect the reluctor rings - they have a nasty habit of splitting and spinning on their mounting surfaces. When you apply the brake, the faulty ring keeps moving while all the other rings slow down with the wheels.

3. james Says: abs sencer act off rotors . check brake flioud an master cylender not drifting . an coumpter for abs

4. robert d Says: the tire sizes not being the same could be it.if not the abs system its self is malfunctioning

5. coleman Says: An anti-lock braking system, or ABS is a safety system which prevents the wheels on a motor vehicle from locking up (or ceasing to rotate) while braking.
A rotating road wheel allows the driver to maintain steering control under heavy braking by preventing a skid and allowing the wheel to continue interacting tractively with the road surface as directed by driver steering inputs. ABS offers improved vehicle control and decreases stopping distances on dry and especially slippery surfaces. However, on loose surfaces like gravel and snow-on-pavement, it can slightly increase braking distance while still improving vehicle control

6. Motorhead Says: Disconnect.
Any good driver can easily do better than anti lock brakes ever could.
They are designed only for the idiot who panics and locks up the brakes.
Anyone who pumps the brakes can stop in a shorter distance because they know where the point of locking up is, and the automatic pumps of the ABS have to just rapidly fluctuate between full on and full off. Which is not nearly as good as a decent driver can do.

I quickly found some motorcycle test values that illustrate what I mean:

Figure 2. Comparative Braking Distances by Motorcycle
(Average of Five Passes on Dry Pavement)
Expert rider, all distances from 60 mph

BMW (non-ABS model) 153 ft
Full ABS Control 162 ft
ABS disabled 155 ft

Honda (non-ABS model) 149 ft
Full ABS Control 156 ft
ABS disabled 150 ft

Yamaha (non-ABS model) 148 ft
Full ABS Control 152 ft
ABS disabled 148 ft

Tag: Why do my Antilock Brakes (ABS) trigger EVERY time I stop?

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