The pic of the 1Y crank above shows some kind of tin wheel with cut out similar to the petrol trigger wheel type. Are you 100% that is a 1Y crank? I have not come across this and as the IDI has no electronic pump control wonder if that is not maybe a TDI crank? Possibly it is a very late IDI one and is used for diagnosis or pump timing. The engine codes will be difficult to link to actual cars as there is such a large range with all the seat, skoda,vw, audi and ford vehicles that use them.