Cummins CENTRY Wiring Diagram | ECM Pinout, Variable Voltage & Frequency Throttle Systems (Bulletin 3666078)

Technical Highlights

• Full ECM connector pinout and signal mapping
• Multiple application configurations:
  • Vehicular systems (mechanical & electric drive)
  • Stationary power applications
  • Monitor/control systems
• Dual throttle systems:
  • Variable voltage throttle
  • Variable frequency throttle
• Sensor circuits:
  • Rail pressure sensor
  • Oil pressure & temperature
  • Coolant temperature
  • Engine speed sensors (primary & secondary)
• Actuator control:
  • Fuel shutoff solenoid
  • EFC valve (electronic fuel control)
  • Step Timing Control (STC) actuator
• Communication:
  • J1587 data link
• Diagnostic circuits:
  • Fault lamp
  • Diagnostic test switch
• Power distribution and fuse protection

👉 The main diagram on page 1 clearly shows multiple system configurations, including ECM connections, throttle interfaces, and sensor-actuator relationships across different applications.

Table of Content

• ECM Wiring Overview
• Application Configurations (Vehicular / Stationary / Electric Drive)
• Variable Voltage Throttle System
• Variable Frequency Throttle System
• Sensor Network Wiring
• Actuator Control Circuits
• Engine Speed & Rail Pressure Systems
• Data Link Communication (J1587)
• Diagnostic & Fault Lamp Circuits
• Power Supply & Ground Distribution

File Information

• Manufacturer: Cummins
• System: CENTRY Engine Management
• Document Type: Wiring Diagram
• Bulletin: 3666078-04
• Format: PDF
• Pages: 1
• Content: Electrical Schematics, Pinout, Multi-Application Wiring