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aka Hall effect sensor, aka CKP sensor. They can fail Posted by SWEDECAR [Email] (#112) [Profile/Gallery] (more from SWEDECAR) on Tue, 14 Oct 2003 08:54:51 In Reply to: AKA RPM sensor AKA Crank Position Sensor..., David Ingram, Tue, 14 Oct 2003 08:23:24 Members do not see ads below this line. - Help Keep This Site Online - Signup |
in many ways and most of the time they get worse and worse by being heat sensitive, car stalls after 1 hour of driving and starts again when cold.
That's why it's a good idea to open the hood if you suspect a failing sensor, to hasten up the cooling.
From there the time gets shorter and shorter between failure.
A failing sensor like that is very possible to fault trace by using a high speed lab scope. You look at the wave form (PWM signal up to 93, A/C wave form after 94) to determine if it drops all the way down to 0 volt (actually, ~ 0.2V).
When the sensor starts to fail the signal don't make it all the way down to zero, and when it stops about halfway from feed signal to zero (could be 12V feed or 5 V feed) that car starts to buck and hesitates.
Anders
posted by 63.196.5...
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