CAT ET Software 2026B & 2026A — Caterpillar Electronic Technician

CAT ET Software 2026B / 2026A (Caterpillar Electronic Technician) — Full Service Dealer is dealer-level diagnostic software for Caterpillar engines and machines. Choose your version above: 2026B is the latest release, while 2026A remains available for technicians who need that release. Both options include remote installation on one Windows PC, WinFLASH, Factory Password and technical support. Choose Your CAT ET Software Version Version Best for Delivery CAT ET 2026B — Latest Technicians who want the newest available release and current coverage Remote installation via TeamViewer on 1 Windows PC CAT ET 2026A Technicians who specifically require the 2026A release Remote installation via TeamViewer on 1 Windows PC This listing is software only. A laptop and CAT Communication Adapter are not included. Select the version before adding the product to your cart; the displayed price changes with your selection. What the CAT ET Diagnostic Tool Does View active and logged diagnostics (fault codes) across engine and machine systems Monitor real-time parameters — temperatures, pressures, speeds and sensor values Record and graph performance data for troubleshooting View and change ECM configuration Perform diagnostic tests and calibrations Update ECM software with WinFLASH (official flash files) Print diagnostic reports Supported Caterpillar Engines & Applications CAT ET works across the electronically controlled Caterpillar range, including: On-highway truck engines — C7, C9, C11, C13, C15, C16, 3406E, 3126 Off-highway & industrial — C4.4, C6.6, C7, C9, C13, C15, C18, C27, C32 and the 3400/3500 series Machines — excavators, wheel loaders, dozers, motor graders, backhoes, articulated trucks and more Generator sets and marine engines Not sure if your engine or machine is covered? Send us the model or serial number before ordering and we'll confirm. What's Included Your selected version: CAT ET 2026B (latest) or CAT ET 2026A — Full Service Dealer WinFLASH function 10-year license Remote installation via TeamViewer (1 PC) Technical support included Factory Password CAT Electronic Technician Software Details Versions: 2026B (latest) or 2026A Full Service Dealer — select above Size: approx. 10 GB Region: All regions Languages: English, German, Spanish, French, Italian, Portuguese, Danish CAT Communication Adapter 3 Requirements Caterpillar Communication Adapter 3 (CAT Comm 3), part number 478-0235 9-pin / 14-pin adapter USB cable The diagnostic adapter is not included and must be purchased separately. CAT ET connects to the machine only through a compatible adapter — ask us if you need one. CAT ET Software System Requirements Windows 10 or 11 (64-bit) Sufficient free disk space for installation Frequently Asked Questions What's the difference between 2026A and 2026B? 2026B is the newer release and the recommended choice for the newest available coverage. Choose 2026A only when you specifically need that release. Both versions are available from the version selector on this page. Which Caterpillar engines does CAT ET cover? The electronically controlled CAT range — on-highway (C7–C16, 3406E, 3126), off-highway and industrial (C4.4–C32, 3400/3500 series), machines, gensets and marine engines. Send us your model to confirm. What is WinFLASH? WinFLASH is the function used to update (flash) Caterpillar ECM software with official flash files, keeping the control module on the current calibration. Is this a CAT ET software download? The software is delivered digitally, but this product includes remote installation through TeamViewer rather than an unsupported download-only purchase. Our technician installs the CAT ET version you select, configures the required components and verifies the program opens correctly on your Windows PC. What CAT ET software license is included? This package includes the 10-year license listed above for one Windows PC. The Caterpillar Communication Adapter is separate and is not included unless it appears as an additional product option. What adapter do I need? A CAT Communication Adapter III (478-0235) with the correct 9-pin or 14-pin cable. The adapter is not included with the software. How is it delivered? Remote installation via TeamViewer, scheduled at your convenience. Technical Support WhatsApp: +51 941 033 487 Telegram: t.me/motorsymphdiesel Email: info@motorsymphdiesel.com CAT ET Software Price, Download & Setup Resources The current CAT ET software price is displayed above and includes remote installation on one Windows PC. Our technician handles the selected CAT ET version through TeamViewer, so you do not need to configure the installation alone. Before ordering, read the complete CAT ET software guide, check the Caterpillar fault-code guide, and prepare your CAT Comm Adapter using our diagnostic adapter driver hub. Choose the Right Caterpillar Software Package CAT ET diagnostic software: use this page when you already have a compatible CAT Communication Adapter and need live diagnostics, tests, calibrations and WinFLASH. Complete Caterpillar software package: choose the CAT ET + CAT SIS + CBT + Flash Files package when you also need service information and additional Caterpillar resources. Factory Password only: use the Caterpillar 10/18-digit Factory Password service if CAT ET is already installed and you only need a one-time password. Need CAT Parts and Service Manuals? CAT ET connects to the machine for live diagnostics. For offline parts illustrations, service procedures, wiring diagrams and hydraulic schematics, add CAT SIS 2021 Offline to your workshop setup.