As we all known the cat caterpillar ET Truck scanner can support for heavy duty trucks and can support Bulldozer, Wheel Loader, Excavator, Dump Truck, Grader these truck, but not all the truck scan support according to the car type and the year of car, now we sell both the original factory cat caterpillar ET adapter and OEM cat caterpillar ET diagnostic adapter III,you can check with our store about the Cat Caterpillar scanner.
the difference between the caterpillar ET diagnostic Adapter III the main cable is the big different, the original factory Cat Caterpillar the cable is the COM port cable, and the OEM cat caterpillar Adapter III the cable is USB port cable. the belows photo are the two kind of cable for the Cat Caterpillar ET Diagnostic Adapter III:
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