CAT ET 2019C System Requirements
CAT ET 2019C hardware requirements depend on your use case. Fault code reading and parameter monitoring run on minimal hardware. ECM flash programming requires the CA3 adapter, a stable internet connection for the Cat factory server handshake, and a fully charged laptop — an interrupted flash session can require dealer recovery.
Operating System Compatibility
| OS |
Status |
Notes |
| Windows 11 (64-bit) |
✅ Fully supported |
Recommended for new installs |
| Windows 10 (64-bit) |
✅ Fully supported |
Most common in fleet shops |
| Windows 10 (32-bit) |
❌ Not supported |
CAT ET 2019C is 64-bit only |
| Windows 7 / 8 |
❌ Not supported |
— |
| macOS / Linux |
❌ Not natively supported |
Use VMware + Windows — see VMware guide |
Hardware Requirements
| Component |
Minimum |
Recommended |
Notes |
| CPU |
Intel Core i5, 2.0 GHz |
Intel Core i7, 2.5 GHz+ |
AMD Ryzen 5 also compatible |
| RAM |
8 GB |
16 GB |
Large equipment ECM sessions benefit from 16 GB |
| Storage |
40 GB free |
100 GB SSD |
SIS (Service Information System) data files are large |
| Display |
1366×768 |
1920×1080 |
Higher res improves parameter dashboard layout |
| USB |
USB 2.0 |
USB 3.0 |
CA3 adapter uses USB 3.0 for faster communication |
| Internet |
Activation only |
Broadband |
Required for ECM flash server handshake |
| Battery (laptop) |
3-hour runtime |
5+ hours |
Never program an ECM on a low-battery laptop |
Compatible Adapters — Full Breakdown
Tier 1 — Full Functionality (ECM Programming + All Diagnostics)
| Adapter |
INSITE Functions |
| CAT Communication Adapter 3 (CA3) |
✅ All — ECM programming, parameter changes, event log download, bi-directional tests, full CAT proprietary protocol |
Tier 2 — Diagnostics Only (No ECM Programming)
| Adapter |
Protocols |
CAT ET Functions |
| CAT Communication Adapter II (CA2) |
J1939, CAN, CAT proprietary (limited) |
Fault codes, live parameters, limited bi-directional on older equipment. No ECM flash. |
| NexIQ USB-Link 2 |
J1939, J1708, CAN |
Fault codes and J1939 parameters on J1939-equipped CAT engines. No ECM programming. |
| NexIQ USB-Link 3 |
J1939, J1708, CAN |
Same as USB-Link 2. |
| Dearborn Group DPA 5 |
J1939, J1708 |
Fault codes and parameters only. |
Not Compatible
- Generic ELM327 adapters (passenger car OBD-II only)
- Autel, Launch, Snap-on proprietary adapters
- Cummins INLINE 7 / INLINE 6 (Cummins-specific)
Connector Locations on CAT-Powered Equipment
| Equipment / Truck |
Connector Type |
Location |
| Kenworth T800 / W900 (C15/C18) |
9-pin Deutsch |
Under dash, driver side |
| Peterbilt 379 / 389 (C15) |
9-pin Deutsch |
Under dash, driver side |
| CAT Excavators (320, 330, 349) |
CAT 9-pin service connector |
Left side console panel in cab |
| CAT Dozers (D6, D8, D9) |
CAT 9-pin service connector |
Right side cab panel, near operator seat |
| CAT Wheel Loaders (950–990) |
CAT 9-pin service connector |
Inside cab, dash panel left side |
| CAT Off-Highway Trucks (777, 785, 793) |
CAT 9-pin service connector |
Access panel on left cab ladder area |
Get CAT ET 2019C
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