Section 8 (Engine Control System & Fuel System - 6.6L (LLY) - Troubleshooting & Diagnosis)

• Symptoms - Engine Controls
  • Diagnostic Instructions
  • Symptoms Description
  • Symptoms Definition
  • Symptoms Verification
    • Notes
    • Identifying Intermittent Conditions
  • Symptoms Testing
  • Additional Symptoms Tests
• Malfunction Indicator Lamp (MIL) Diagnosis
  • Diagnostic Instructions
  • Circuit/System Description
  • Reference Information
  • Circuit/System Verification
  • Circuit/System Testing
  • Repair Procedures
• Engine Cranks but Does Not Run
  • Diagnostic Instructions
  • Circuit/System Description
  • Diagnostic Aids
  • Reference Information
  • Circuit/System Verification
  • Circuit/System Testing
  • Repair Procedures
  • Repair Verification
• Fuel Pump Electrical Circuit Diagnosis
  • Diagnostic Instructions
  • Diagnostic Fault Information
  • Circuit/System Description
  • Diagnostic Aids
  • Reference Information
  • Circuit/System Verification
  • Circuit/System Testing
  • Repair Procedures
• Fuel Pressure Regulator Diagnosis
• Fuel System Diagnosis
  • Diagnostic Instructions
  • Circuit/System Description
  • High Pressure System
  • Return System
  • Diagnostic Aids
  • Reference Information
  • Circuit/System Verification
  • Circuit/System Testing
  • Repair Procedures
• Fuel Return System Diagnosis
  • Diagnostic Instructions
  • Circuit/System Description
  • Diagnostic Aids
  • Reference Information
  • Circuit/System Verification
  • Circuit/System Testing
  • Repair Procedures
• Fuel Leak Diagnosis
  • Diagnostic Instructions
  • Circuit System Testing
• Fuel System Diagnosis - High Pressure Side
  • Diagnostic Instructions
  • Circuit/System Description
    • High Pressure System
    • Return System
  • Diagnostic Aids
  • Reference Information
  • Circuit/System Verification
  • Circuit/System Testing
  • Repair Procedures
• Fuel Injector Balance Test with Tech 2 (Automatic Transmission)
  • Diagnostic Instructions
  • Circuit/System Description
  • Diagnostic Aids
  • Circuit/System Verification
  • Circuit/System Testing
  • Repair Procedures
• Fuel Injector Balance Test with Tech 2 (Manual Transmission)
  • Diagnostic Instructions
  • Circuit/System Description
  • Diagnostic Aids
  • Circuit/System Verification
  • Circuit/System Testing
  • Repair Procedures
• Fuel Tank Leak Test
  • Notes
  • Leak Check Procedure
• Contaminants-in-Fuel Diagnosis
• High Idle Switch Diagnosis (with RPO UF3)
  • Circuit Description
  • Diagnostic Aids
• Charge Air Cooler Diagnosis (Charge Air Cooler Air Leak Test)
  • Diagnostic Instructions
    • Notes
    • Charge Air Cooler Outlet Connection (Engine Air Intake COLD Side)
  • Charge Air Cooler Inlet Connection (Engine Air Intake HOT Side)
  • Leak Test - Air Pressure Application
  • Leak Test Fails
  • Leak Test Passes
• Charge Air Cooler Diagnosis (Full System Air Leak Test)
  • Diagnostic Instructions
  • Reference Information
  • Charge Air Cooler Inlet Connection (Engine Air Intake Hot Side)
  • Turbocharger Exhaust Pipe Connection
  • Air Pressure Application
  • Leak Test Fails
  • Leak Test Passes
• Inspection/Maintenance (I/M) System Check
  • Diagnostic Instructions
  • Circuit/System Description
  • Conditions for Updating the I/M System Status
  • Monitored Emission Control Systems
  • Circuit/System Verification
  • Circuit/System Testing
  • Repair Procedures
• Inspection/Maintenance (I/M) System DTC Table
  • Diagnostic Instructions
• Inspection/Maintenance (I/M) Complete System Set Procedure
  • Diagnostic Instructions
  • Circuit/System Description
  • Conditions for Meeting a Cold Engine
  • Diagnostic Aids
  • Circuit/System Verification
  • Circuit/System Testing
  • Repair Procedures
• Fuel Heater Inoperative
  • Diagnostic Instructions
  • Circuit/System Description
  • Reference Information
  • Circuit/System Testing
  • Component Testing
  • Repair Procedures
• Fuel Heater Always On
  • Diagnostic Instructions
  • Circuit/System Description
  • Reference Information
  • Circuit/System Testing
  • Repair Procedures