The diagnostics of electro-pneumatic brake system for industrial vehicles is a process dependent on the system manufacturer. With regard to this, the tools developed by manufactures are usually aimed to steady platforms devoid of standards. In order to lighten this drawback, we propose the design of model based tools for the semi-automatic generation of multiplatform applications, from domain, task, and platform (PC, Tablet PC, PDA, “proprietary devices”, etc.) models. This paper describes the architectural approach for the diagnostic application generator tool. This paper also points out some of the problems that need to be solved, and lines of work are proposed on this regard.