ECU Computer Board 3863444 386-3444 Engine Control Module for CAT Excavator 312D2 313D2 318D2 320D2 326D2 329D2 330D2 With Program

The 3863444 / 386-3444 ECU Engine Control Module is a high-performance electronic control unit designed for Caterpillar D2 series excavators.

It serves as the central engine control system, managing fuel injection, engine timing, and machine performance with precision and stability.

This ECU is fully tested, programmable, and ready for installation, making it a reliable replacement for faulty or damaged original units.

• 3863444
• 386-3444

• CAT 312D2
• CAT 313D2
• CAT 318D2
• CAT 320D2
• CAT 326D2
• CAT 329D2
• CAT 330D2

✔ High-performance ECU / ECM controller
✔ Stable and precise engine management
✔ Plug & play installation (depending on system setup)
✔ Programmable control module
✔ OEM-standard replacement quality
✔ Strong resistance to heat, vibration, and harsh conditions
✔ Long service life for heavy-duty machinery

This ECU controls key engine operations including:

• Fuel injection control
• Engine speed regulation
• Air-fuel ratio optimization
• Sensor data processing
• Diagnostic and communication system management

It ensures stable engine operation, improves fuel efficiency, and reduces machine downtime.

Each ECU is strictly tested before shipment:

• Full electronic function test
• Signal stability test
• High-temperature aging test
• Vibration resistance test
• Connector and circuit inspection

✔ Direct replacement ECU module
✔ Easy installation design
✔ Some models may require programming or calibration depending on machine configuration

• 1 * ECU Engine Control Module (3863444 / 386-3444)

• Fast global shipping (DHL / FedEx / UPS / TNT)
• 1–3 working days dispatch
• Technical support available
• OEM & wholesale supported

• Professional ECU supplier (JISION machinery parts)
• Stable quality control system
• Large inventory availability
• Fast response & global export experience
• Reliable after-sales support