OK, no worries, it is the old Motronic MA 2.4 on that model, not real familiar with the specifics on it but any of the GS911's should have no trouble seeing the module. Which GS911 model are you using ?
I would suggest using model/series menu then a basic module scan to see if it picks up any comms from the Motronic. After that I would look at the power to the actual Motronic at the socket to confirm it has power rather than at the injector. I would also check continuity of the wiring out to the diags socket before I considered replacement of the Motronic although I recall they are relatively low cost on EBay