In this video, we’re looking at both wheel speed sensors at the same time. Then we take a look at the left front wheel speed sensor’s output voltage on the s…
In this video, we’re looking at both wheel speed sensors at the same time. Then we take a look at the left front wheel speed sensor’s output voltage on the s…
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Thanks Dave for the comment! Sometimes, electrical problems being
intermittent is really hard to nail. It turns out that with this LeSabre,
the problem never showed its face again. I figure that it knew I was in
there and it said to itself. “Mmm, this guy is going to fix us; we better
straighten ourselves out.” Thanks again for the comment and glad you liked
the videos.
One more thing blackwell. Most cars are getting away from these types of
sensors and switching over to an active type sensor which uses a
hall-effect element. The reason is that the passive sensors generate low
voltage at lower speeds and thus the ABS is disabled at slow speeds. The
newer sensors can generate a voltage at very slow speeds. And not all
passive sensors such as mine uses a floating ground. Some connect back to
DC- and then you can look at multiple sensors with full voltage.
I was only able to get the first 2;38 to play. Looking forward to the rest.
I can see that spelunkerd was able to see the whole thing
Dave, you are one funny guy! Yes, I believe we have cardiac arrest there,
lol. Mmmm, I believe I’m going to leave the mathematical explanation up to
you on that one, lol. Thanks for watching!
The shape of your abnormal wave forms looks like ‘torsades de pointe’, seen
during a rare type of cardiac arrest. There must be some profound
mathematical explanation for that, ha ha.
blackwell, if you want to use the software that I’m using, it’s free. It
comes preloaded with demo signals where you can use all the controls as I
was showing and more. Check out picoauto and you can download it from
there.
hey terry really enjoyed vids. I had a 2005 lacrosse same intermittent
problem I had to change harness going to sensor moisture issue or maybe the
twisted wire thing you referred to hope this helps dave
If you want to learn more about the picoscope, check out autonerdz forum.
Those guys over there are really sharp and amazing what they come up with
in how to use picoscope. Discussion on the floaters also.
Hi blackwell, I checked it out when I uploaded it and it worked fine. Just
checked again and all is well. Youtube does some funny things sometimes.
Did you go back and check again to see if it works?
thanks I tried it again and it worked. I’m going to watch it again now, I
appreciate your help in showing this use of a scope, parameter setting,etc.
It is a little daunting to consider that selecting a floating ground could
possibly damage the scope.
Yes, the Fluke ScopeMeter series has isolated inputs which totally isolates
the commons from each channel. Of course, that costs even more money.
Here’s a scenario… You have a crank sensor that has a floatiing return
and a cam sensor that’s a hall effect. One channel right across the crank
sensor. , the other across the cam sensor. Now you’ve grounded out the
crank sensor and the car won’t start where it did before. Just something to
keep in mind when dealing with floaters.