A system, method, and computer-readable medium for modeling and diagnosing a system. System identification information captured by an AR system is used to identify the system and one or more of a model of the components of the system or an overlay of the system is retrieved from a repository or generated based on component identification information or component performance data and sent to the AR system. A composite view of the model or overlay relative to a dynamic image or model of the system allows a technician to visualize the system and components and diagnose the operation of the system without opening the system.