CAT COMM ADAPTER III · P/N 317-7485 · CDL + J1939 DUAL DATA LINK
Caterpillar CAT ET 3 Heavy Equipment & Industrial Engine Diagnostic Interface
Field-proven rugged hardware for mining, construction, and power generation—delivering simultaneous CDL + J1939 diagnostics, hydraulic calibrations, and WinFlash ECM programming.
- Comm Adapter III (317-7485)
- Simultaneous CDL + J1939
- 9+14 Pin Y-Cable Included
- 6-Month Otoeko Warranty
Engineered for Professional Workshop Demands
The CAT ET 3 Comm Adapter III (317-7485) is built to deliver speed, accuracy, and stability in busy service bays.
Simultaneous CDL & J1939 Dual Data Link
Scans proprietary CAT Data Link (CDL) and SAE J1939 / J1708 networks in parallel to display engine, transmission, and hydraulic ECMs on one screen.
Injector Trim Coding & Cylinder Cutout Tests
Uploads E-Trim calibration files for HEUI/MEUI/CR injectors and executes automated or manual cylinder cutout tests.
WinFlash ECM Programming & Parameter Configuration
Flashes firmware onto engine and machine ECMs via WinFlash and modifies customer/system parameters.
Hydraulic, Transmission & DPF/SCR Calibrations
Performs excavator main pump PRV current calibration, Powershift clutch fill calibration, and Tier 4 / Stage V DPF regeneration.
ACERT ENGINE & INJECTOR DIAGNOSTICS
Complete Control from C4.4 to C32 Engines
Core workshop operations on ADEM III, ADEM IV, and A5E engine controllers:
- Read and clear active and logged CID-FMI / SPN-FMI fault codes with freeze-frame data
- Program injector E-Trim codes and run injector solenoid click tests
- Real-time graphing (Data Logger) of fuel rail pressure, boost, exhaust temp, and operating hours
- Reset DPF soot load, trigger forced regeneration, and test DEF/AdBlue dosing systems
HEAVY-DUTY FIELD HARNESS
Direct 9-Pin & 14-Pin CAT Machine Connection
Engineered to prevent disconnects in high-vibration mining and construction sites:
- Heavy-duty Y-cable featuring both 9-Pin Deutsch and 14-Pin round CAT diagnostic connectors
- Strain-relieved locking USB cable for uninterrupted WinFlash sessions
- Front-panel LED indicators for Power, USB, and Data Link traffic
- Foam-lined hard plastic carrying case (Note: Software and laptop sold separately)
ARCHITECTURE & SYSTEM COMPATIBILITY
CAT ET 3 Comm Adapter III (317-7485) Software, Protocol & ECU Coverage
Hardware and operating parameters engineered for uninterrupted dealer-level communication:
- CDL + J1939: Dual-channel hardware reads CAT Data Link and J1939 simultaneously
- 9+14 Pin Y-Cable: Connects directly to 9-Pin and 14-Pin CAT diagnostic ports
- WinFlash Ready: Stable USB throughput for safe ECM firmware flashing
- ADEM III / IV / A5E Engine ECM
Detailed Visual & Technical Showcase
Close-up details and application views of the CAT ET 3 Comm Adapter III (317-7485).
Technical Specifications & System Parameters
Complete manufacturer-verified technical data and operating ranges.
| Hardware Model | Caterpillar Communications Adapter III (CAT ET 3) |
|---|---|
| Reference Part No | P/N 317-7485 / 478-0235 |
| Compatible Software | CAT Electronic Technician (CAT ET) & CAT SIS (Sold separately) |
| Supported Protocols | CAT Data Link (CDL), SAE J1939 CAN, SAE J1708 / J1587 |
| Machine & Engine Coverage | CAT Excavators, Loaders, Dozers, Graders, Generators, Marine & C4.4–C32 Engines |
| Vehicle Connector | Combined 9-Pin Deutsch + 14-Pin CAT Round Y-Cable |
|---|---|
| PC Interface | Locking Industrial USB Cable (RP1210 Compliant) |
| Operating Voltage | 9V – 32V DC (12V & 24V Systems) |
| Warranty | 6-Month Otoeko Hardware Warranty |
Workshop Application & Operating Guide
Recommended 4-step standard procedure for accurate results.
Connect 9-Pin or 14-Pin Plug
Lock the matching 9-Pin or 14-Pin plug of the Y-cable into the machine diagnostic port.
Attach USB & Turn Key ON
Connect the CAT ET 3 unit to your laptop via USB and switch machine ignition to ON.
Scan ECMs in CAT ET
Launch CAT Electronic Technician to automatically detect all ECMs across CDL and J1939.
Diagnose, Calibrate & Flash
Review fault codes, code injector E-Trims, calibrate hydraulics, or flash ECM firmware via WinFlash.
Technical Capabilities & Operational Advantages
Key engineering advantages for professional workshop diagnostics.
Core Workshop Requirements
- Generic truck scanners cannot properly read proprietary CAT Data Link (CDL).
- Cannot upload injector E-Trim files or run WinFlash ECM programming.
- Lacks excavator hydraulic PRV and Powershift transmission calibrations.
- Requires separate adapters for 14-Pin CAT construction sockets.
With CAT ET 3 Comm Adapter III (317-7485)
- Reads CDL and J1939 simultaneously for full factory access to all CAT ECMs.
- Executes injector E-Trim coding, cylinder cutout, and WinFlash ECM programming.
- Performs OEM hydraulic PRV valve and transmission clutch fill calibrations.
- Includes combined 9-Pin + 14-Pin Y-cable for direct hookup to all CAT machines.
Package Contents — Ready for the Workshop
Complete kit inspected prior to dispatch.
- 1 × Caterpillar CAT ET 3 (Comm Adapter III · 317-7485) Main Unit
- 1 × Combined 9-Pin Deutsch + 14-Pin CAT Round Diagnostic Y-Cable (DB25)
- 1 × Locking Industrial USB PC Cable
- 1 × Hard Plastic Carrying Case (Note: Software sold separately)
6 Months Official Otoeko Warranty
The CAT ET 3 Comm Adapter III (317-7485) is backed by a 6 Months official Otoeko warranty against manufacturing defects, with full technical support.
Frequently Asked Questions
Key technical questions from technicians and workshops about the CAT ET 3 Comm Adapter III (317-7485).
Which Caterpillar machines and engines are supported?
Supports CAT excavators (312–390), wheel loaders (924–992), dozers (D5–D11), backhoe loaders, graders, generators, marine engines, and C4.4 through C32 ACERT engines.
Are both 9-pin and 14-pin connectors included?
Yes, the included Y-cable integrates both the 9-Pin Deutsch connector and the 14-Pin round CAT connector.
Can it perform injector trim coding and WinFlash ECM programming?
Yes, via CAT ET it uploads injector E-Trim files, runs cylinder cutout tests, and flashes ECM firmware with WinFlash.
What is the difference between CAT ET 3 and CAT ET 4?
CAT ET 3 (317-7485) is the proven USB field standard for CDL + J1939 networks, while CAT ET 4 adds Ethernet/DoIP support for the newest architectures.
Is CAT ET software included?
This listing includes the CAT ET 3 hardware and cables; software and pre-configured laptop bundles are available separately.
What is the warranty period?
Covered by a 6-month official Otoeko hardware warranty.