Cummins ISC Wiring Diagram | ECM 3944105 3944125 Pinout, Injectors, Sensors & J1939 J1587 (3666267-02)

Technical Highlights

• Full ECM pinout (Connector A & OEM Connector B layout)
• Supported ECM part numbers:
  • 3944105
  • 3944125
• Fuel system control:
  • Accumulator fuel pressure sensor
  • Accumulator fuel temperature sensor
  • Injection control valve
  • Front & rear pumping control solenoids
  • Lift pump
• Sensor network:
  • Engine speed (crankshaft sensor)
  • Engine position (camshaft sensor)
  • Intake manifold pressure
  • Coolant temperature
  • Oil pressure (optional)
  • Ambient air pressure
• Control systems:
  • Accelerator pedal (ISS / non-ISS configurations)
  • Cruise control & PTO switches
  • Engine protection override
  • Exhaust brake control
• Communication:
  • SAE J1939 data link
  • SAE J1587 data link
• Diagnostic systems:
  • Stop lamp
  • Diagnostic lamp
  • Maintenance lamp
  • Wait-to-start lamp
  • Water-in-fuel lamp
• Actuators:
  • Injection control valve solenoid
  • Pumping control solenoids
  • Fan clutch
  • Cold start aid relays
• Power distribution:
  • Battery supply and ignition circuits
  • Starter lockout relay
  • Fuse-protected power lines

Table of Content

• ECM Connector Layout (Connector A & B)
• Fuel System Control (Accumulator, Injection Valve, Pumps)
• Sensor Network (Pressure / Temperature / Speed)
• Accelerator & Control Systems
• Diagnostic Lamps & Indicators
• Data Link Communication (J1939 / J1587)
• Actuator Control Systems
• Power Supply & Ground Distribution

File Information

• Manufacturer: Cummins
• Engine Model: ISC
• ECM Part Numbers: 3944105, 3944125
• Fuel System: Accumulator / Injection Control Valve System
• Document Type: Wiring Diagram
• Bulletin: 3666267-02
• Format: PDF
• Pages: 1
• Content: Electrical Schematics, Pinout, Fuel & Sensor Systems