The Army diagnostic equipment program for the support of automotive material is presented. Three generations of equipment will be discussed: the first generation is a family of computer-controlled automatic test equipment for automatic diagnosis of a complete vehicle; in the second generation, a transducer kit will be permanently installed on board the vehicles with provision for rapid connection to the computer; the third generation will be an on-board go/no-go system to indicate the condition of major components (no external test equipment required).