10-02-2019, 09:12 AM
CrPS is a magnetic or Hall effect sensor that generates voltage with cooperation of a tone wheel. Missing tooth from a tone wheel, ring gear or flywheel is TDC. These two tell ECM the exact position of the piston. Crank to cam = 2:1 = 720*:360 = one full cycle of four stroke engine.
ECM uses its program to ground out particular injector, while B+ supplies constant power when IGN is on.
![[Image: 2b19f6d234789ebecd25259e127d9a1c.jpg]](https://cb1100forum.net/forum/uploads/imp/201910/2b19f6d234789ebecd25259e127d9a1c.jpg)
Tone wheel with missing tooth/TDC
This missing tooth/TDC will make a different kind of pulse as seen in pic below
![[Image: ea2e897b43f3049ddfd886072384ed4e.png]](https://cb1100forum.net/forum/uploads/imp/201910/ea2e897b43f3049ddfd886072384ed4e.png)
CrPS pattern with TDC signal
CrPS + missing tooth + ECM do the trick, this is how I see it.
Not sure if CB uses tone wheel, ring gear, flywheel or...?? as a TDC reference, but must use something.
ECM uses its program to ground out particular injector, while B+ supplies constant power when IGN is on.
Tone wheel with missing tooth/TDC
This missing tooth/TDC will make a different kind of pulse as seen in pic below
CrPS pattern with TDC signal
CrPS + missing tooth + ECM do the trick, this is how I see it.
Not sure if CB uses tone wheel, ring gear, flywheel or...?? as a TDC reference, but must use something.