Registering a New Data Module (slide 1 of 3) To register another data module, select the "Preview or Register a vehicle" icon from the home page. A data module is "Diagnosis and Repair" or "Factory Technical Service Bulletins" for one vehicle. For example, "Diagnosis and Repair" for an additional car, "Factory Technical Service Bulletins" for another vehicle, or a vehicle you have already registered would all be separate modules. To proceed, let's click on the "Preview or Register a vehicle" icon.