PicoScope 7 Automotive
Available for Windows, Mac, and Linux, the next evolution of our diagnostic scope software is now available.
hi,Rfmotors1 wrote: ↑Fri Oct 06, 2023 7:09 amHi tintoverano,
I have looked at your waveforms and tried to get some logical answer, as this is very interesting topic.
I am also assuming there is no complain from customer and no DTC or any warning light.
The main question is what should we do when we get such reading, replace some part as this may be the last stage of component before it fails? or let it go because there is nothing wrong?
1- Can it be damaged pick-up ring? dirty or magnetised? Can the properties change by temperature?
2- Could it be faulty sensor?
Here is what I have observed when I have overlayed both crankshaft sensor signals. They are also synchronised with help of cam sensor to set them to current position. The result is they are both identical except the first rising edge is different, it will be easier to see the pictures with some notes.
Overlayed Crank WF.jpg
Let’s focus on the falling edges as described on following picture.
Overlayed Crank WF detail 3.jpg
My guess is the rising edge is advanced due to faulty sensor, the fact there is no problem yet does not mean it is normal and will not cause trouble in near future. But that is just my guess.
I also think the damaged pick-up wheel would have permanent effect as well as some metal chips on the pick-up wheel.
It would be fantastic if someone else could put more light to this.
Once more, thank you for bringing this up tintoverano.
Regards,
Roman