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micro amp captures (Read 37,204 times)
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Re: micro amp captures
Reply #15 - Jun 12th, 2010 at 6:12pm
 
Gotta love those Escape tone rings! Grin
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The purpose of todays training is to defeat yesterdays understanding.
 
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john racic
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Re: micro amp captures
Reply #16 - Jun 29th, 2010 at 5:12pm
 
OK Earthlings, here we go again!

Our special thanks to Mick, who by requesting Nissan wheel speed sensors has made sure we went 2 weeks without a late model Nissan!  (except an 08 Versa without ABS)  That is really a good thing.

But today we got 2 05's in, and grabbed patterns on both.

Once again lots of stuff we don't quite understand, hopefully someone can help.

First is an 05 Nissan Murano.  It is exactly like Mick said, virtually a flat line on the volts.  Odd thing noted is that the volts sit at about 6.5 and -6.5, in round numbers.

Once again going to break this up into pieces.  Files way too big for here, will post on drop site.

John and Mike
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anmuranowss.gif (177 KB | )
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john racic
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Re: micro amp captures
Reply #17 - Jun 29th, 2010 at 5:16pm
 
As you can tell frequency in that picture is kind of a waste, so we pushed it off the picture in the next picture

Both of these are
A:volts on sensor wire
B:volts on sensor wire
C: milliamps on sensor wire
D: frequency

Next car is an 05 Nissan Maxima

Completely different.
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anmaximawss.gif (113 KB | )
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john racic
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Re: micro amp captures
Reply #18 - Jun 29th, 2010 at 5:20pm
 
Some of the things we noticed and cannot explain.

The maxima has a small voltage trace showing.  It's voltage is more normal, about ground and battery.  But the signal is in the ground side of the wire.

The Murano had virtually no voltage trace, and the voltage was floating, half above and half below ground

Here's what really gets me.  The voltage trace on the Maxima basically shows a digital style square wave.  The milliamps trace shows a sin wave.  How does this happen?

John and Mike
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Mick
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Re: micro amp captures
Reply #19 - Jun 29th, 2010 at 6:14pm
 
john racic wrote on Jun 29th, 2010 at 5:12pm:
OK Earthlings, here we go again!

Our special thanks to Mick, who by requesting Nissan wheel speed sensors has made sure we went 2 weeks without a late model Nissan!  (except an 08 Versa without ABS)  That is really a good thing.

But today we got 2 05's in, and grabbed patterns on both.

Once again lots of stuff we don't quite understand, hopefully someone can help.

First is an 05 Nissan Murano.  It is exactly like Mick said, virtually a flat line on the volts.  Odd thing noted is that the volts sit at about 6.5 and -6.5, in round numbers.

Once again going to break this up into pieces.  Files way too big for here, will post on drop site.

John and Mike



That's the best selling feature that I have been waiting for.

Question on both vehicles, did you try the probe on either wires for the sensor? If so were the results the same?

Maybe I should know how these sensors work, but does it really matter when you got a tool to show if it’s working or not!

Great work lads.

Mick
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 Mick
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john racic
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Re: micro amp captures
Reply #20 - Jun 29th, 2010 at 6:31pm
 
Mick wrote on Jun 29th, 2010 at 6:14pm:
Question on both vehicles, did you try the probe on either wires for the sensor? If so were the results the same?


Mick

You know i kept thinking the laws of physics would tend to say that both wires should be the same for amp flow.

But next one we will try and see.  Up until now just been grabbing whichever wire was easier to get.  So far we have always gotten good patterns. And our luck says if only one had a signal we would always, always grab the wrong one!  Certainly worth trying to see.
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