Dont know how helpful i`ll be with this idea but just a guess feel free to shoot me down in flames
When i began using the diagnostics on cars i had a galaxy and this had various modules that controlled anything from central locking to climate. I could see each of these modules seperately including the engine module or ecu. When i run diagnostics on my cmax i see one controller which is the ecu i cant read any other modules just this one. Have ford cut all controllers except for the ecu which may now control everything. Having said all of that i dont remember seeing wires to the injectors only the diesel pipe,surely wires would be present if the injectors were smart enough to be able to control injection timings and such.