A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

ABS Issue

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Old Sep 5, 2005 | 04:33 PM
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StrictlyA4's Avatar
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Default ABS Issue

Thanks in advance to all who helped out.

To begin ABS light is solid yellow. E-brake not on or flashing. ONLY ABS LIGHT ON.

I was trying to replace my rear rotors on my 99 A4 yesterday and had some trouble. I didn't purchase new wheel bearings however the trouble is after i put everything back together. After taking off one rotor I knocked out the slotted ring on the back side it... must be something for the sensor. I put it back on but it now feels like its hitting the sensor when i spin the rotor. maybe it did that before i messed with everything but i sure know my ABS light was never on.

Everything back on and Im driving it around. Initially ABS ligt is NOT on however everytime I came to a stop I could feel the ABS kicking in. Come to a stop sign at 10 mph and ABS kicks in again. Then I get on the highway ABS light comes on and when I come to an exit the ABS is NO LONGER working or kicking in. It had to that slotted ring that I knocked off the rotor.

My question is... in what postion should the slotted thing be in? Should it be touching the sensor when i put in back on or should I knock the slotted thing in more so it doesn't touch.

Any help is appreciated. Thanks again fellas.
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Old Sep 5, 2005 | 04:49 PM
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it shouldnt be touching the sensor, it should be a little bit away
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Old Sep 5, 2005 | 05:02 PM
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where can i get the slotted ring piece?
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Old Sep 5, 2005 | 05:16 PM
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Default After some more research i've found out...

that the "reluctor ring" must be out of place. Here is a good site for my ABS issue. not my vehicle but good info in general. Looks like it needs to be placed just right... yikes!

http://www.sjmautotechnik.com/trouble_shooting/brake.html
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