[urq] reference sensor bench testing

[Mike Del Tergo]

This is exacty what I was thinking of.  I didn't know if a simple screwdriver across the sensor was enough or maybe an attachment on a rotary toll whizzing by at a good clip.  Not sure on the 20V sensor, but I haveOhms at rest on this sensor. I do get a flutter on the DMM when rapidly fluttering a steel rod by the sensor (set for small electrical reading not Ohms).  Seems like and oscilliscope/sensor swap are in my future as well as a double check for the ref pin.  Can you tell me the best way/opening of checking to see if the pin is still there?  Also did you ever find what caused the "mechanical" jump in timing?

thx

Mike

 

 


Subject: Re: [urq] reference sensor bench testing
From: audionly at gmail.com

 Then hooked the sensor back up and hooked an ohm meter to it and turned the car over..........No reading on the ohm meter. Then I pulled the sensor out of the block and ran a screwdriver back and forth across the face and the ohm meter moved.  Then we tried another known good sensor with the same results. Next we had heard of a issue where the sensor loses some of it's magnetism and to measure the distance from the sensor to the pin with some modeling clay. No issue there. Then we plugged the sensor back into the harness but left it out of the block. I ran a screwdriver rapidly across the face of the sensor while Dennis cranked the car............... It started. (No one had ever heard of doing this but it does make sense once you analyse it. The computer is looking for an exact pulse from the hall generator and the reference sensor. Then Davey Jones suggested using a scope instead of an ohm meter. It picked up the signal from the sensor. 









 
On Sat, Aug 29, 2009 at 5:08 PM, Mike Del Tergo <mdeltergo at hotmail.com> wrote:


Ingo,

I had thought that the reference pin swinging by generated and electrical field of some measurable output and thought there might be another way to generate a field and measure.  I will Ohm the unit for starters.

Thx

Mike



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