LAUNCH CRT  501  Series  User  Manual                                                                  
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6.2.7 Control Operation of On-Board Component/System
This option is used to access vehicle-specic subsystem and component tests. 
Available tests vary by vehicle manufacturer, year, and model.
6.2.8 Read Vehicle Information
This function retrieves a list of information (provided by the vehicle 
manufacturer) from the vehicle’s on-board computer.
This information may include: VIN (Vehicle Identication Number), CID 
(Calibration ID) and CVN (Calibration Verication Number).