The Caterpillar Comm Adapter 3 is a diagnostic scanner interface. It is a CAT group dealer workshop diagnostic tool designed to work with Caterpillar heavy vehicles and engines. It is the most recent generation of the CAT Comm Adapter KIT. It replaces the previous adapter version(CAT COMM ADAPTER KIT II).  The older part numbers for the Cat com 3 adapter are 466-6258 and 317-7487. Please check the CAT comm adapter ToolKIT 3 Operating Manual in PDF to make sure that you are familiar with Important Safety Information and the toolkit futures. An optional DVD package for the WInFlash of Cat Flash Files 2021/11 is available. This is the only data transfer tool that will allow you to interact with the cat engine on two data channels properly. This function is required for some cat ET (Electronic Technician) functions. At the moment, both cat kits are available for purchase - 466-6258 and 538-5051.   The only difference with the new kit is that the adapter (box) will not pull the voltage to power itself from the computer's USB Port. The computer will recognize it as a connected device but cat ET will not read the device unless it is plugged into a powered ECM Technician) functions.  Caterpillar scan tool includes: Cat comm adapter III (part # 478-0235 replaces P/N 317-7485) CD with the drivers 370-4617 USB Cable (From the device to your computer) 457-6114 J1939/J1708 Cable (from device to your truck) Hard Shell Case with foam ...