Recognize that a 'misfire' is a guesstimate by the DME...


As the engine is spinning, the DME is reading the rotational acceleration of the crankshaft... (this is how you get the 'rough running' display from INPA, etc)


When one cylinder seems to 'lag' the expected motion, the DME says 'misfire on X'


On an engine with problems, that misfire can sometimes be attributed to the wrong cylinder. All these signals are coming into the DME to be decoded- crank position sensors, cam sensors, etc.



But this isnt what OP asked... A misfire on cylinder 1- so this is the cylinder the engineers are BMWAG decided will be 'cylinder 1 forever and ever' will ALWAYS be coded with a hex error code that attributes this to cylinder one. Different code readers CANNOT 'remap' this and say it is a different cylinder.


In terms of diagrams? Who knows...thats just a graphics exercise. Grab the BMW firing order from ISTA. Nothing else matters