[DayvG]

Are you replaced the used ZGW-8sk?
In this case Flexray port for DSC will closed.

You need to open the Flexray port of the DSC using tool32.

Adding to what is said here you must open port 2 (port 2 is showing as DSC in NEWTIS but also ICM is showing as 2) which is the DSC port in the ZGW. You do this by running the following in TOOL32

Open TOOL32, run ZGW_01. The job you then run is 
status_flexray_pfad This will report which Ports are open/closed. Ein=Yes Aus=No
Then you run
steuern_flexray_pfad
In the argument field you then type 
0x02;0x01
0x02 = Port 2
0x01 = open port (close port would be 0x00)

This will need to be done for all equipment that is connected to ports on the ZGW if the ports are not already open. It may be worth opening all ports and seeing if that allows communication with DSC on FLEXRAY.