canbus !!!

from a quick count i can tell you that there is no fewer than 7 ecm's as a minimum on todays cars , all have multi comm patterns via wired pairs as production data communication , all with digital atributes , with lots of 'if' possibilities !!

and as for the data speed through can , well , let s put it this way , alot of the diagnostic software thats about to day , has to have some form of converter to in effect slow the data thats in the syatem so it can be read , wether it be primary or secondary comm speed !!