[Shotimes] Testing ABS

[Bruce Malachuk]

There is a really easy way to test them, as I have gone thru a number of
times with salvaging old used sensors from cars I have parted.

First is the ohms of resistance. I think the spec is 1050 to 1200, though
you'd want to look in the EVTM for the exact spec. If it's within that range
then the sensor should be good if this next part of testing is good. With
the wheel turning the sensor should make .5V AC on a multimeter. Mind you
the wheel dosen't have to be turning all that fast to make that.

Both of these can be tested with a multimeter on the car. The information I
provided here came to me by way of a friends SNAP-On scanner, but I have
found it to be accurate in finding bad sensors. 

With the problem you describe it sounds like a craccked ABS ring on one of
the front axles. Had that happen to a 93 I sold a while back. 


Bruce J Malachuk

*	94 Opal Frost MTX 
*	93 Emerald Green MTX - SOLD 
*	93 Black ATX - New Parts CAR 
*	95 Silver Frost ATX SE - SLO -Buyer waiting 
*	96 TR - Cam Failed parts car :-(


-----Original Message-----
From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
On Behalf Of Peter Chase
Sent: Friday, July 22, 2005 2:08 PM
To: Sholist
Subject: [Shotimes] Testing ABS

Is there a way to test individual ABS sensors?  Whenever I'm coming to a
stop, at around 5 mph, my ABS will come on, immediately dumping line
pressure, making coming to a complete stop before hitting the car in front
of me (or rolling downhill into an intersection) quite interesting.  I've
now removed the ABS fuse to eliminate the problem, but I'd like to be able
have ABS again someday.  Initially, I thought my problem was due to grease
buildup on my lf wheel speed sensor due to a cracked CV boot.  However,
since replacing the CV joint and cleaning all of the gunk off of the sensor,
the problem remained.  It seems like as the car is coming to a stop and the
wheels are barely turning, one of the sensors loses its signal and the car
thinks it's skidding, activating the ABS.  Is there any kind of automatic
test, or do I just have to unplug one sensor at a time and look for a
particular type of signal as I manually turn the wheel?
Thanks,
    Pete
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