Fuel System & Emissions System

• Special Tools
• General Troubleshooting Information
  • Intermittent Failures
  • Service Information
  • Opens and Shorts
  • How to Use the HDS (Honda Diagnostic System)
  • HDS Clear Command
  • Scan Tool Clear Command
  • DTC Clear
  • PCM Reset
  • CKP Pattern Clear/CKP Pattern Learn
    • Clear/Learn Procedure (with the HDS)
    • Learn Procedure (without the HDS)
    • How to End a Troubleshooting Session (required after any troubleshooting)
    • How to Troubleshoot Circuits at the PCM Connectors
  • Substituting the PCM
  • OBD Status
• DTC Troubleshooting Index
• Symptom Troubleshooting Index
• System Description
  • Fuel and Emissions System Diagram
    • System Diagram
  • Vacuum Hose Routing
  • Electronic Control Systems
  • PCM Inputs and Outputs at PCM Connector A (□ ) (44P)
  • PCM Inputs and Outputs at PCM Connector B (Δ ) (44P)
  • PCM Inputs and Outputs at PCM Connector C (◦) (44P)
  • PCM Electrical Connections
  • PCM Circuit Diagram
  • PGM-FI System
    • Notes
    • Air Conditioning (A/C) Compressor Clutch Relay
    • Air Fuel Ratio (A/F) Sensor
    • Barometric Pressure (BARO) Sensor
    • Camshaft Position (CMP) Sensor
    • Crankshaft Position (CKP) Sensor
    • Engine Coolant Temperature (ECT) Sensors 1 and 2
    • Ignition Timing Control
    • Injector Timing and Duration
    • Knock Sensor
    • Manifold Absolute Pressure (MAP) Sensor
    • Malfunction Indicator Lamp (MIL) Indication (In relation to Readiness Codes)
    • Mass Air Flow (MAF) Sensor/Intake Air Temperature (IAT) Sensor
    • Vehicle Speed Sensor
    • Secondary Heated Oxygen Sensor (Secondary HO2S)
  • Electronic Throttle Control System
    • Notes
    • Accelerator Pedal Position (APP) Sensor
    • Throttle Body
  • Electronic Throttle Control System Diagram
  • VTEC
    • Notes
    • Operating Conditions
      • Start running
      • High acceleration from low speed
      • Low speed cruise
      • High acceleration from high speed
      • High speed cruise
      • Deceleration
      • Stop
    • System Operation
      • Normal valve lift mode 1 (default)
      • Normal valve lift mode 2
      • Valve pause mode
    • Idle Control System
      • Notes
      • Brake Pedal Position Switch
    • Fuel Supply System
      • Fuel Cutoff Control
      • Fuel Pump Control
      • PGM-FI Main Relay 1 and 2
  • Catalytic Converter System
  • Exhaust Gas Recirculation (EGR) System
    • Notes
    • EGR Valve
  • Exhaust Gas Recirculation (EGR) System Diagram
  • Positive Crankcase Ventilation (PCV) System
  • Evaporative Emission (EVAP) System
    • Notes
    • EVAP Canister
    • EVAP Canister Purge Valve
    • Fuel Tank Pressure (FTP) Sensor
    • EVAP Canister Vent Shut Valve
  • Evaporative Emission (EVAP) Control Diagram
  • Fuel Cap Warning Message
    • Notes
    • First drive cycle
    • To make the message go off (With the HDS)
      • Procedure
    • To make the message go off (Without the HDS)
      • Procedure
  • Ecological Drive Assist System (Eco assist)
  • Effective Control
    • Notes
    • ETCS (Electronic Throttle Control System)
    • Cruise Control
    • CVT (Continuously Variable Transmission) Control
    • IMA (Integrated Motor Assist)
    • Air conditioning system
  • Driver Feedback System
    • Notes
    • Ambient Meter
    • Eco Guide
    • Eco Drive Profile
    • Real-Time Driving Information
    • Eco Score
    • Eco Stages
    • Lifetime Points
    • Eco Driving Record
• How to Set Readiness Codes
  • Malfunction Indicator Lamp (MIL) Indication (In relation to Readiness Codes)
  • Catalytic Converter Monitor and Readiness Code
    • Notes
    • Enable Criteria
    • Procedure
  • Evaporative Emission (EVAP) Control System Monitor and Readiness Code
    • Notes
    • Enable Criteria
    • Procedure
  • Air Fuel Ratio (A/F) Sensor Monitor and Readiness Code
    • Notes
    • Enable Criteria
    • Procedure
  • Air Fuel Ratio (A/F) Sensor Heater Monitor Readiness Code
    • Notes
    • Procedure
    • Misfire Monitor and Readiness Code
    • Fuel System Monitor and Readiness Code
    • Comprehensive Component Monitor and Readiness Code
  • EGR Monitor and Readiness Code
    • Notes
    • Enable Criteria
    • Procedure