A non-computer / i-pad guy jumping in here, just to mention something.

I do not know what Prevost model year the message center on multiplex coaches displayed the data you are doing via i-pad, but I do know on the Volvo equipped coaches just about any data is available via the message center. You may not want to go beyond a certain model year or DDEC iteration unless you are displaying the information in a different fashion or can convert the information into a more user friendly format.

Multiplex coaches do not limit data displays to the engine or transmission but can display information about the entire coach and its various systems.