[david357]

@koziol: Can you hear the CCC fan running or ist this not working either?

[carat10_2]

Check:
- power
- fiber ring
- wake-up line
- can

You put ampermetter, and check voltage consumptions.

[sweetsam]

Check rear fuse in ccc

[bimmer71]

Only a guess, try fiber looping out tcu, retest car, if changes of if not leave loop in and try to program ccc w istap make sure to use expert mode and remove tcu, if this does not work then most likely cc bad ! and or id car has sdars unit try same w fiber loop !