[V8] ABS Light On

[Scott Phillips]

Kent that's awesome!.. Thanks and now it's in the archives.. I'll be
ordering a pair in the morning. 

...Here is the original post in the Twiki:

Audi.AntiLockBrakingSystemr1.3 - 04 Oct 2004 - 20:58 - TWikiGuesttopic
end


"I hope someone can give me a little help with the ABS system on my '90
CQ. The sytem engages needlessly on occasion while coming to a gentle
stop on dry pavement" 
This answer has been offered: 

"Take a wire brush to the teeth on the outer CV hub that the ABS sensor
uses. These get dirty and filled with gunk giving off less than ideal
signals to the ABS brain. Should do the trick." 

-- HuwPowell - 14 May 2003 

An alternate part number for those expensive ABS sensors on a 1990 V8
Quattro is a Rockwell/WABCO # of a TDA/R955341 available at any heavy
duty truck dealership (Freightliner, Western Star, Sterling, etc.) for
around $40.00 

KyleLeatherwood - 23 Feb 2004 

Kyle posted this substitue for an ABS sensor, so I attached his trouble
shooting too...... -Scott from BOSTON Well, my ABS problems got fixed
over the weekend. My problem was an ABS warning light on all of the
time. Well, to begin I ohm'ed out all four wheel sensors. Ah ha! I found
one sensor that the ohm reading on was so erratic it was impossible to
get a constant reading. Well, in my tracing down the system I realized
that it is a WABCO ABS system on it, which is the same system that
Freightliner trucks (the dealership where I work) use. In a search
through the ABS sensors for the A series WABCO ABS system that we have
on the shelf, I found one with the same plug. A quick ohm check proved
my thought, it is the same ABS sensor. $32.00 later I had a new sensor.
However, the sensor didn't fix the problem. My las thought was to check
all of the ABS relays in the system. Both relays onder the hood checked
fine, but then I ran across the one under the passenger floorboard
cover. Voila! This relay has a 10 amp fuse in the top of it and the fuse
is blown. My guess is that the bad wheel sensor blew the fuse. A new
fuse and ABS sensor on and now the ABS system works like a dream again.
Thanks for everyone's thoughts and help.


10/2007 Addition:
Currently available~!
TDA/R955341
ABS Sensor Kits

Right angle, 90 degree; 5.8 ft. cable lead
$30.99    EACH