DFI SYS/Component Tests

• Diagnosis & Testing Information
• DFI System Check
• Oxygen (O2) Sensor Circuit Check
• Chart A1 - "Service Now/Soon" Lights On (No Codes Set)
  • Notes
  • Chart A
  • Chart B
• Chart A2 - Inoperative "Service Now/Soon" Lights
• Chart A3 - No Start Or Stall After Start
• Chart A4A - Fuel System Diagnosis
• Chart A4B - Fuel Pressure Out Of Range Diagnosis
• Chart A5 - Injector System Diagnosis (1 Of 2)
  • Notes
  • Diagnosis
• Chart A5 - Injector Circuit (2 Of 2)
• Chart A6 - Rich Or Lean Exhaust (Code E44 Or E45)
• Chart A7 - Open Loop Diagnosis
• Chart A8 - Rich Or Lean DRIVEABILITY Diagnosis
• Chart B1 - Restricted Exhaust Check
• Chart C1 - ECM Replacement Check
• Chart C3 - Canister Purge Diagnosis
• Canister Purge Functional Test
• Set Timing Circuit Diagnosis
• Chart C4 - Electronic Spark Timing (Est) System
• Chart C6 - Air Management Diagnosis
• Chart C7 - EGR Diagnosis
  • Notes
  • Diagnostic Aids
• Chart C8 - Viscous Converter Clutch (VCC) System
• Self-Diagnostic System Check
• Test A1 - Inoperative "Service Air Conditioning" Light
• Test B1 - Inoperative "Service Vehicle/Eng Soon" Light
• Test B2 - Inoperative "Service Vehicle/Engine Soon" Light
• Tests C1-C6 - Display Panel Diagnosis
• Wiring Diagrams