The electronic control network in vehicle systems is becoming increasingly complex. Reliable operation of the vehicle is highly dependent upon accurate diagnostics from the system. For a very long time now, FKFS has been deeply involved in the field of diagnostics. The Institute develops diagnostic functions in control units on behalf of our customers: both as classic onboard and offboard diagnostic functions, as well as remote functions over-the-air. In doing so, our engineers are pushing forward the general trend of harmonizing diagnostic functions and protocols globally (e.g. OBD/OBD2, UDS, DoIP), as well as meeting new challenges arising from the electrification of the drivetrain and automated driving.