Cummins ISF3.8 CM2220 F103 Engine Wiring Diagram | Complete OEM & ECM Schematics (4310841)

Coverage

• Complete ECM wiring (J1 engine harness / J2 OEM harness)
• Engine sensors and 5V supply circuits
• Injector and actuator wiring
• EGR system electrical circuits
• Fuel system components
• Cooling system controls
• CAN J1939 data link network
• Diagnostic connector and service tool interface
• Dashboard indicators and warning lamps
• Cruise control and accelerator pedal systems
• Air conditioning and auxiliary controls

Technical Highlights

• Full ECM pinout and signal mapping
• Sensor signal / return / supply architecture
• Shielded and twisted pair wiring identification
• SAE J1939 communication with 120Ω termination
• OEM vs Cummins responsibility separation
• Fuse and relay protected circuits
• High-resolution factory schematic layout

Table of Content

• Wiring Diagram Overview
  • Color Code Legend
  • Signal Types and Symbols
• Power Distribution
  • Battery Supply
  • Ignition Circuit
  • Fuse Protection
• Engine Control Module (ECM)
  • ECM Overview
  • J1 Engine Harness Connector
  • J2 OEM Harness Connector
• Engine Sensors
  • Crankshaft Position Sensor
  • Camshaft Position Sensor
  • Fuel Rail Pressure Sensor
  • Intake Manifold Pressure / Temperature Sensor
  • Barometric Pressure Sensor
  • Coolant Temperature Sensor
  • Oil Pressure Switch
  • Water in Fuel Sensor
• Air & Emission System
  • EGR Valve
  • EGR Temperature Sensor
  • EGR Differential Pressure Sensor
  • Intake Pressure Sensor
• Fuel System
  • Fuel Pump Actuator
  • Injector Circuits
• Vehicle Interface (OEM Side)
  • Accelerator Pedal Systems
  • Brake and Clutch Switches
  • Cruise Control Switches
  • PTO Controls
• Instrumentation & Indicators
  • Tachometer / Tachograph
  • Warning Lamps (MIL, Stop, Warning)
  • Wait-to-Start System
• Communication Network
  • SAE J1939 Data Link
  • CAN Wiring and Termination
• Auxiliary Systems
  • Air Conditioning Control
  • Fan Clutch Control
  • Exhaust Brake
• Diagnostic System
  • Diagnostic Connector
  • Service Tool Interface

File Information

• Manufacturer: Cummins Inc.
• Engine Model: ISF3.8
• ECM Type: CM2220 F103
• Document Type: Wiring Diagram Manual
• Bulletin Number: 4310841
• Language: English
• Format: PDF
• Pages: 1 (large-format schematic)
• Release Date: 21 September 2017

Compatible Applications

• Cummins ISF3.8 diesel engines
• Medium-duty trucks and light commercial vehicles
• Industrial and utility applications using CM2220 ECM