CAT ET3 Adapter cable with 6 pin and 9 pin, Female to Male.CAT 6pin and 9pin Y Cable truck diagnostic tool
Compatible with Comm Adapter version 3 models :478-0235, 317-7485
Y cable for connecting to the 9-Pin or 14-Pin Service Ports, and can be connected to the network cable 457-6114, Data Link Cable, 5995-01-658-8727, Fits CAT, Y-Cable, 4576114, L1A5 Service Cable Assembly for Cat Caterpillar Communication Adapter 3 Toolkit
Communications Adapter 3 is the latest generation of the Communication Adapter group, and replaces the Comm Adapter II.
Data link device that will allow you to properly communicate with a CA engine on dual datalinks.