Just got a XC90 a few months ago. The turbos went out a few weeks ago. Had a friend help me with the replacment. All back together and won't start. I found vehicle has spark and fuel pressure. Found no injector pulse. ecm relay and ALL fuses are good. By the looks of the wiring diagrams the ecm directly controls the ground signal for the. Getting to the wires to check the pinout of the ecm is difficult so i assume they are ok, since the were not moved and everything worked before.

got hold of a aftermarket scan tool and came up with the fault u0002-High speed CSN commnication BUS performance. found the definition to be-Control Module internal fault. faulty signal. permanent fault. is my understanding right when i say the ecm is not delivering a injector signal because the ecm is now toasy?

Any help or insight would be great
Thank in advance
Tim

 

Well I know its been awhile and didn't get any help from anyone on here, due to it being such a weird problem. Figured i would post the results. found the CEM was taking out the CAN bus. not sure why it started after i had the turbo out. but anyway. replaced with a junk yard module and it fired right up. After doing a search for CEM's on google i found a few post, q/a about how they can be a common problem. Anyway hope this helps anyone out in the future. Thanks