Alvarokr

Hi.
Patient Macan 2.0tfsi 17r USA
After a frontal collision with pyrotechnics fired. Repaired, but there are problems with the electronics. Errors - No power steering, PSM, AWD, no handbrake, ABS, SRS.
The PIWIS diagnostic computer and thinkdiag show the same thing. OEM battery from 17 The engine starts. Errors on the dashboard: abs, esp, airbag, AWD, no power steering, driving possible, PSM fault.
Lots of communication errors. The main errors are lack of communication with PSM, EPB, AWD, CAN chassis.
The SRS controller was not removed for cleaning. After installing the new pyrotechnics in the SRS controller, there is only error U112100 - no communication with PSM and the passenger mat sensor which can be calibrated, but the error returns after a while.
All fuses are intact.

VAGfan

Sounds like the CAN bus for the Powertrain is disconnected somewhere. The CAN bus wires typically "daisy-chain" from one module to the next, so if one module, or the CAN bus wire is disconnected/broken, then multiple or the entire chain of modules can be disconnected, with the resulting "Loss of Communication" errors.

Alvarokr

So I have to check in detail module of steering wheel becouse I had to change socket ( whole black plastic) which was broken.
Main power socket was broken, but it haven’t done short circuit..the fuse was ok

New socket from broken steering gear

Broken