Lastest CAT Caterpillar ET Software Version 2026B[07.2026]

Caterpillar Comm Adapter III - diagnostic scanner interface is a cat group dealer workshop diagnostic tool built to work with Caterpillar heavy vehicles and Caterpillar engines. It is the latest generation of the cat Communication Adapter group and replaces the cat Comm Adapter II & the old 466-6258 and 317-7487 tool number.

Caterpillar scan tool includes:

CAT Comm Adapter III (part # 317-7485)

CD with the drivers

USB Cable (From device to your computer)

J1939/J1708 Cable (from device to your truck)

Hard Shell Case with foam inserts

Caterpillar ET 2026B

Caterpillar Electronic Technician (Cat ET) is a service tool designed to run on a personal computer (PC) under Microsoft Windows. It will communicate with the Electronic Control Modules (ECMs) through a communication data link thus allowing you to diagnose existing and potential problems, configure the product and obtain data for analysis.

With the CAT Diagnostic Tool, you can:

View active and logged diagnostics

View events where irregularities occurred and were logged by the ECM

View the status of a group of parameters (temperatures, pressures, etc.) simultaneously

Record and log performance data

Graph a group of status parameters

View the current configuration of an ECM

Change ECM configurations

Perform diagnostic tests

Perform calibrations

Print reports and diagnostic results

For some machine and engine products, additional functionality has been included with the service tool program

Caterpillar ET 2026B (replaces CAT ET 2026A, 2025C,2024C) Electronic Technician Diagnostic Software [07/2026] 
1.Latest Caterpillar ET 2026B Software to work with CAT/CAT3 Truck Scanner
2.With one free activation, can send software online
3.Support Multi-languages：English, Chinese, Danish, French, German, Italian, Japanese, Portuguese, Russian, Spanish
4. OS: Windows 8/8.1 32 bit, Windows 8/8.1 64 bit, Windows 10 32 bit, Windows 10 64 bit, Windows 11 64 bit, Windows 11 Pro 64bit

5.Make: caterpillar

6.Region:WorldWide

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.

RPC Requirements for CAT ET 2026B
Recommended configurations:
PC with a 2.0 GHz dual-core processor
4 GB RAM
5 GB of available hard disk space
12-inch or larger screen, Windows desktop compatible
Microsoft Windows™ 8.1 Professional, Windows 10 Professional, or Windows 11 Pro (Note: Windows 8 RT is not supported)
RS232 port with 16550AF UART or compatible (for use with Comm Adapter II)
USB v1.1, v2.0, v3.0, or v3.1 port (for use with Comm Adapter 3)
Ethernet RJ45 connector (or Wi-Fi adapter)
Built-in pointing device or mouse
Microsoft Internet Explorer version 11, Microsoft Edge, Firefox, or Chrome browsers are 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)

Potential compatibility issues!
Laptops with ARM CPUs (e.g., Snapdragon 8cx, Microsoft SQ1) are not supported.
As of the 2020B release, the CAT ET service tool no longer supports Windows 7. Installation is possible but not guaranteed to be stable.

The following communication adapters are supported:

Caterpillar Comm Adapter 2

Caterpillar Comm Adapter 3

Nexiq USB-Link 1/2/3(for On-Highway only)

RP-1210C Compliant Communication Adapters, such as:

Noregon® DLA+ 2.0 Adapter Kit

Other compliant adapters: Please check with us if your adapter is not on this list.

Caterpillar electronic technician 2026B with WinFlash future is an updated version of the caterpillar dealer diagnostic software that can help technicians to diagnose existing and potential problems with their electronically controlled Caterpillar Engines and Machines

If you work on Caterpillar machines, you will definitely use this diagnostic software. The Electronic Technician has all the tools and capabilities you'll need to diagnose and successfully repair your CAT off-road and on-road machines

To get the vehicle information the Cat ET software must be connected to the Electronic Control Module (ECM). For this purpose, you need a suitable diagnostic link adapter (DLA), for instance, Genuine CAT Comm Adapter III

The list of supported CAT machines and engines can be found below:
Engines:
Electric Power
Electric Power Generation
Industrial
Marine Power Systems
Oil and Gas

Machines:
Articulated Trucks
Asphalt Pavers
Backhoe Loaders
Cold Planers
Compactors
Dozers
Drills
Excavators
Feller Bunchers
Forest Machines
Forwarders
Harvesters
Hydraulic Mining Shovels
Knuckleboom Loaders
Material Handlers
Motor Graders
Off-Highway Trucks
Pipelayers
Road Reclaimers
Site Prep Tractors
Skid Steer and Compact Track Loaders
Skidders
Telehandlers
Track Loaders
Underground - Hard Rock
Underground - Longwall
Underground - Room and Pillar
Utility Vehicles
Wheel Dozers
Wheel Excavators
Wheel Loaders
Wheel Tractor-Scrapers

Communication Hardware
Caterpillar Communication Adapter III
Configuring Cat Electronic Technician to use the Communication Adapter 3

For Cat Electronic Technician to work with the Communication Adapter 3, the settings must be changed to select the Communication Adapter 3 as the Communication Interface Device:
Step 1 Start Cat Electronic Technician.
Step 2 Click the Stop Connect button when it appears.
Step 3 Select the Utilities menu.
Step 4 Choose “Preferences > Modify...”.
Step 5 Select the Communications tab.
Step 6 Select Cat Comm Adapter 3 (RP1210) and click OK.
NOTE: Because a growing number of products require multiple data link service, the “Enable Dual Datalink Service” checkbox has been pre-selected.
Servicing ECMs on more than one data link requires this check box to be enabled.
Failure to do this will result in undetected ECMs and reduced functionality.

Original Factory Caterpillar ET3 Adapter III Compare With OEM Caterpillar ET Diagnostic Adpater III
1. Original Factory CAT ET can use once pluged, no need install the USB drive, the software can automatic realize it for ET3 Adapter, and the machine can automatic weld the high quality Circuit board, quality will be more reliable.
2. The OEM Caterpillar ET Diagnostic Adapter III need use USB Drive to install, and need choose the COM Port, and  in the software ET also need choose ET2 then can be used. 

The Details as follows:

Diagnostic Software Display: