what kind of scanner is it...i havent seen any "generic"<---loose term. scanners being able to read can-bus systems. charger, 300c, durango, new rams, crossfire, jeep grand cherokee...those are all i can think of that are on the can-bus system right now.
if you can scan can-bus, you should be able to go to a screen that shows a visual wiring diagram in real time showing which modules are active on the bus, if you watch it you'll be able to see if a module is temporarily or intermittantly falling off the bus. thats usually the biggest help, maybe thats only with the star scan..thats all i've used.