Unlock full CAT diagnostics with the trusted OEM CAT Comm 3 Adapter.
This genuine communication adapter is the same interface used by Caterpillar dealers worldwide. It connects your diesel diagnostic laptop to CAT engines, transmissions, and machines — delivering full diagnostic control through CAT software.

Key Features:

• Compatible with CAT ET 2023A and earlier

•  Connects to your diagnostic laptop via USB

•  Enables complete access to engine, hydraulic, transmission, and aftertreatment systems

•  Supports diagnostics, programming, calibrations, injector coding, parameter changes, and more

•  Works on on-highway trucks, off-road equipment, and industrial machines

Common Applications:

• Construction equipment (Excavators, Dozers, Loaders)

• On-highway CAT-powered trucks

• Industrial generators and marine systems

• Dealer-level support for fleets and CAT technicians

What’s Included:

• 1x CAT Comm 3 Communication Adapter

• 1x USB Cable

• 1x 9-pin & 14-pin diagnostic cable

• 1-Year Hardware Warranty

Important Notes:

• Laptop and CAT ET software sold separately

• For best performance, pair with a NoFeeDiesel™ preloaded diagnostic laptop