A total system approach toward mass automotive diagnosis that has been successful for ten years is presented. Paper reviews what are considered as the reasons for success in St. Louis, highlights unique test methods developed, covers some equipment modifications, and such other important ingredients as: personnel administration/training, facility layout, testing sequences, architectural problems inherent in dynamometer usage, cost controls, equipment improvements, and inspired management. Another unique feature of the system is the post-repair reinspection offered to users for one dollar, and feedback data on repair quality is also presented. This medium through-put facility performs approximately 12,000 inspections annually.
