Engine Controls - Diagnostic Methods - CNG, Flex-Fuel & Gasoline

• Diagnostic Methods
  • Overview
• Diagnostic Tools
• Scan Tool Set-up and Functionality
• Vehicle Check/Preparation
  • Notes
  • Visual Checks
  • Vehicle Preparation
• Quick Test
  • Notes
  • Key On Engine Off (KOEO) On-Demand Self-Test
  • Key On Engine Running (KOER) On-Demand Self-Test
    • Notes
    • Brake Pedal Position Test
    • Transmission Control Switch Test
    • Power Steering Pressure Test
  • Continuous Memory Self-Test
• Parameter Identification (PID)
  • Description
  • Generic OBD II PID List
  • Ford PID List
• On-Board System Readiness
  • Description
• Freeze Frame Data
  • Description
• Output Test Mode
  • Description
• Clear The Continuous Diagnostic Trouble Codes (DTCs) And Reset The Emission Monitors Information in The Powertrain Control Module (PCM)
  • Description
• Resetting The Keep Alive Memory (KAM)
  • Description
• Flash Electrically Erasable Programmable Read Only Memory - Flash EEPROM
  • Description
  • Programming the VID Block for a Replacement PCM
  • Making Changes to the VID Block
  • Making Changes to the PCM Calibration
• Diagnostic Monitoring Test Results
• Drive Cycles
  • Description of OBD II Drive Cycle
  • Drive Cycle Recommendations
• Intermittent Diagnostic Techniques
  • Notes
  • Recreating the Fault
  • Accumulating PCM Data
    • Notes
    • Analyzing Data From Playback of Stored PIDs
  • Peripheral Inputs
  • Comparing PCM Data
• Adaptive Fuel DTCs Diagnostic Techniques
  • Notes
  • Obtain Freeze Frame Data
  • Using the LONGFT1 and LONGFT2 (dual bank engines) PIDs
  • Resetting Long Term Fuel Trims
  • P0171/P0174 System Too Lean Diagnostic Aids
    • Notes
    • Air Measurement System:
    • Vacuum Leaks/Unmetered Air:
    • Insufficient Fueling:
    • Exhaust System Leaks:
  • P0172/P0175 System Too Rich Diagnostic Aids
    • Notes
    • Air Measurement System:
    • Fuel System:
    • Base Engine
• Basic Circuit Checks
  • Description
    • Notes
    • Open Circuit (Continuity)
    • Shorts to Ground
    • Shorts to Power