Motor Vehicles: Transmission, Exhaust, Brake, and Accessory Systems Credit Hours: 3 Approximate reading time: 0.5 Hours Approximate online time: 0.5 Hours You Must Be Signed In To View This Program. Register Today NFPA Documents Disclaimer- NFPA and other resource editions cited within the CFITrainer.Net site were current as of the release of the respective modules. The field of fire investigation and its guiding documents are constantly evolving and it is incumbent upon the fire investigator to remain up to date with the guidance in the current editions of the documents referenced in all modules on CFITrainer.Net, regardless of which edition was used in the writing of the module. Program Abstract Understanding how a motor vehicle works is critical foundational knowledge for investigating vehicle fires. Modern motor vehicles are very complex machines and there is a wide variation in the design and manufacture of their systems. This self-paced program is the second part of a two-part basic introduction to motor vehicle systems. This program describes the function and major components of the transmission, exhaust, brake, and accessory systems. The first part of this series is found in the program "Motor Vehicles: The Engine and the Ignition, Electrical, and Fuel Systems."