Caterpillar Electronic Technician (Cat ET) is diagnostic software required to communicate, diagnose and service electronically controlled Caterpillar engines and machines.
When connected to an Electronic Control Module (ECM), a technician has the ability to diagnose existing and potential problems, configure the product, and obtain data for analysis. This program works with the dealer diagnostic scanner Caterpillar Communication Adapter as well as RP1210 compatible diagnostic adapters such as Nexiq, DPA5 and others.
PC, Communication Hardware, and Cable Requirements
To run the service tool, the next PC, communication hardware, and cable requirements must be met. NOTE: The minimum PC Configurations should not be used as a standard when buying new personal computers for service tool purposes. If the existing equipment meets these minimum requirements, it will run the service tool.
PC containing a 2.0 GHz dual-core processor
3GB of the available hard disk drive
DVD-ROM drive (optionally)
15.4-inch XGA Screen (1280×1024 compatible)
Microsoft Windows™ 7 Professional or Windows 8 Professional, Windows 10 Professional (Not tested with Home Edition) (Note: Windows 8 RT is not supported)
RS232 port with 16550AF UART or compatible (for use with Comm Adapter II)
USB 1.1 or 2.0 port (for use with Comm Adapter 3)
Ethernet RJ45 connector
Built-in pointing device or mouse
For security purposes, Microsoft Internet Explorer version 11 or newer or Microsoft Edge is recommended.
Note: The most recent version of Microsoft Internet Explorer may not be validated to work with the service tool.
Wi-Fi (for the Wireless Comm Adapter 3)
The list of supported CAT machines and engines can be found below:
Electric Power Generation
Marine Power Systems
Oil and Gas
Hydraulic Mining Shovels
Site Prep Tractors
Skid Steer and Compact Track Loaders
Underground – Hard Rock
Underground – Longwall
Underground – Room and Pillar
Display, graph and log status parameters.
Retrieve prognostic data including histograms, engine totals for fuel used and miles traveled.
View active diagnostics and clear logged diagnostics. View events where irregularities have occurred and have been logged by the ECM.
Perform calibrations to enhance performance of the ECM.
Customize the ECM with application-specific settings.
Over 100 custom Diagnostic, Information and Service features including:
– 2D and 3D Histogram plotting capability (engine software
– Custom Status screen groups
– Snapshots (Download and display snapshot data recorded by the
– Configuration Aid that allows upload/download of same
configuration to multiple control modules
1.Real CAT et3 Comm Adapter III (it’s real cat et 3,not adapter 2,please check Communication port)
2.J1939/J1708 Cable (from device to your truck)
3.ET software DVD （for windows XP or windows7 32bit system)
4.14PIN Cable(for new truck)
5. 6pin cable ( For old trucks )
2021B Cat ET software as Cat Caterpillar ET 2018C 2019A 2019C 2021A Software update version, 2021B Caterpillar Electronic Technician software With CAT ET 3 Cat caterpillar adapter 3 support caterpillar diagnostic till 2021.