Prognostics when selected in eXpress Diagnostics will Always run before other diagnostics and show at the beginning of the Diagnostic Tree.
Here we see Prognostics on tire wear and hydraulic hoses. The Diagnostic assumes that these itemsl will be replaced independent of normal isolation but they can still be in ambiguity up until the prognostic creteria is met.
If Diagnostics is set up for Prognostics a diagnostic run can be excluding prognostic using the window shown above