ACTIA, an expert in the architecture of on-board electronic systems, is also an expert in the diagnosis of these systems. Thus, DIAG 4 Agri makes it possible to connect to the vehicle’s various ECUs via an external communication interface and to operate on the on-board electronics: updating or setting the ECUs, for example. These interventions are carried out via a hardened tablet. The aim is to manage vehicle electronics to comply with changing regulations, to carry out maintenance operations and to compensate for the growing complexity of on-board electronic systems with a high-performance, easy-to-use diagnostic solution.