Engine Control System - Introduction (Qr25DE)

• Index For DTC
  • DTC No. Index
• Precautions
  • Notes
  • Precautions for Procedures without Cowl Top Cover
  • On Board Diagnostic (OBD) System of Engine and CVT
  • Precaution
• Preparation
  • Special Service Tools
  • Commercial Service Tools
• Engine Control System
  • System Diagram
  • Multiport Fuel Injection (MFI) System
    • Input/Output Signal Chart
    • System Description
    • Various Fuel Injection Increase/Decrease Compensation
    • Mixture Ratio Feedback Control (Closed Loop Control)
      • Notes
      • Open Loop Control
    • Mixture Ratio Self-Learning Control
    • Fuel Injection Timing
      • Notes
      • Sequential Multiport Fuel Injection System
      • Simultaneous Multiport Fuel Injection System
    • Fuel Shut-Off
  • Electronic Ignition (EI) System
    • Input/Output Signal Chart
    • System Description
  • Fuel Cut Control (at No Load and High Engine Speed)
    • Input/Output Signal Chart
    • System Description
• Air Conditioning Cut Control
  • Input/Output Signal Chart
  • System Description
• Automatic Speed Control Device (ASCD)
  • System Description
    • Input/Output Signal Chart
    • Basic ASCD System
    • Set Operation
    • Accelerate Operation
    • Cancel Operation
    • Coast Operation
    • Resume Operation
  • Component Description
    • ASCD Steering Switch
    • ASCD Brake Switch
    • ASCD Clutch Switch
    • Stop Lamp Switch
    • Electric Throttle Control Actuator
    • ASCD Indicator
• Can Communication
  • System Description
• Evaporative Emission System
  • Description
    • System Description
    • Evaporative Emission Line Drawing
  • Component Inspection
    • EVAP Canister
    • Fuel Tank Vacuum Relief Valve (Built Into Fuel Filler Cap)
    • EVAP Canister Purge Volume Control Solenoid Valve
    • Fuel Tank Temperature Sensor
    • EVAP Canister Vent Control Valve
    • EVAP Control System Pressure Sensor
    • EVAP Service Port
  • Removal and Installation
    • EVAP Canister
    • EVAP Canister Vent Control Valve
  • How to Detect Fuel Vapor Leakage
    • Notes
    • With Consult-III
    • Without Consult-III
• On Board Refueling Vapor Recovery (ORVR)
  • System Description
  • Diagnostic Procedure
    • Symptom: Fuel Odor From EVAP Canister Is Strong
    • Symptom: Cannot Refuel/Fuel Odor From The Fuel Filler Opening Is Strong While Refueling
  • Component Inspection
    • Refueling EVAP Vapor Cut Valve
      • With CONSULT-III
      • Without CONSULT-III
• Positive Crankcase Ventilation
  • Description
    • System Description
  • Component Inspection
    • PCV (Positive Crankcase Ventilation) Valve
    • PCV Valve Ventilation Hose
• NVIS (NISSAN Vehicle Immobilizer System-NATS)
  • Description
• On Board Diagnostic (OBD) System
  • Introduction
  • Two Trip Detection Logic
  • Emission-related Diagnostic Information
    • Emission-Related Diagnostic Information Items
    • DTC And 1ST Trip DTC
      • Notes
      • How to Read DTC and 1st Trip DTC
        • Notes
        • With GST
    • Freeze Frame Data And 1ST Trip Freeze Frame Data
    • System Readiness Test (SRT) Code
      • Notes
      • SRT Item
      • SRT Set Timing
      • SRT Service Procedure
      • How to Display SRT Status
        • With Consult-III
        • With GST
      • How to Set SRT Code
        • Notes
        • With Consult-III
        • Without Consult-III
      • Driving Pattern
      • Suggested Transmission Gear Position for CVT Models
      • Suggested upshift speeds for M/T models
      • Suggested Maximum Speed in Each Gear
    • Test Value And Test Limit (GST Only - Not Applicable To Consult-III)
    • How To Erase Emission-Related Diagnostic Information
      • How to Erase DTC
        • With CONSULT-III
        • With GST
  • Malfunction Indicator Lamp (MIL)
    • Description
    • On Board Diagnostic System Function
      • Notes
      • MIL Flashing Without DTC
    • How To Switch Diagnostic Test Mode
      • Notes
      • How to Set Diagnostic Test Mode II (Self-diagnostic Results)
      • How to Erase Diagnostic Test Mode II (Self-diagnostic Results)
        • Notes
        • Diagnostic Test Mode I - Bulb Check
        • Diagnostic Test Mode I - Malfunction Warning
    • Diagnostic Test Mode II - Self-Diagnostic Results
      • Notes
      • How to Erase Diagnostic Test Mode II (Self-diagnostic Results)
  • OBD System Operation Chart
    • Relationship Between Mil, 1ST Trip DTC, DTC And Detectable Items
    • Summary Chart
    • Relationship Between Mil, DTC, 1ST Trip DTC And Driving Patterns For "Misfire < Exhaust Quality Deterioration >", "Fuel Injection System"
    • Explanation For Driving Patterns For "Misfire < Exhaust Quality Deterioration >", "Fuel Injection System"
      • < Driving Pattern B >
      • < Driving Pattern C >
    • Relationship Between Mil, DTC, 1ST Trip DTC And Driving Patterns Except For "Misfire < Exhaust Quality Deterioration >", "Fuel Injection System"
    • Explanation For Driving Patterns Except For "Misfire < Exhaust Quality Deterioration >", "Fuel Injection System"
      • < Driving Pattern A >
      • < Driving Pattern B >
• Basic Service Procedure
  • Basic Inspection
  • Idle Speed and Ignition Timing Check
    • Idle Speed
      • With CONSULT-III
      • With GST
    • Ignition Timing
      • Notes
      • Method A
      • Method B
  • Procedure After Replacing ECM
  • VIN Registration
    • Description
    • Operation Procedure
      • With CONSULT-III
  • Accelerator Pedal Released Position Learning
    • Description
    • Operation Procedure
  • Throttle Valve Closed Position Learning
    • Description
    • Operation Procedure
  • Idle Air Volume Learning
    • Description
    • Preparation
    • Operation Procedure
      • With CONSULT-III
      • Without CONSULT-III
    • Diagnostic Procedure
  • Fuel Pressure Check
    • Fuel Pressure Release
      • With CONSULT-III
      • Without CONSULT-III
    • Fuel Pressure Check
• Trouble Diagnosis
  • Trouble Diagnosis Introduction
    • Introduction
    • Work Flow
      • Overall Sequence
      • Detailed Flow
    • Diagnostic Worksheet
      • Description
      • Worksheet Sample
  • DTC Inspection Priority Chart
    • Notes
    • Fail-Safe Chart
  • Symptom Matrix Chart
    • System - Basic Engine Control System
    • System - Engine Mechanical & Other
  • Engine Control Component Parts Location
  • Vacuum Hose Drawing
  • Circuit Diagram
  • ECM Harness Connector Terminal Layout
  • ECM Terminals and Reference Value
    • Preparation
    • ECM Inspection Table
  • CONSULT-III Function (ENGINE)
    • Function
    • Engine Control Component Parts/Control Systems Application
    • Work Support Mode
      • Work Item
    • Self-Diag Results Mode
      • Self Diagnostic Item
      • Freeze Frame Data and 1st Trip Freeze Frame Data
    • Data Monitor Mode
      • Monitored Item
    • Active Test Mode
      • Test Item
    • DTC & SRT Confirmation Mode
      • SRT STATUS Mode
      • SRT WORK SUPPORT Mode
      • DTC WORK SUPPORT Mode
  • Generic Scan Tool (GST) Function
    • Description
    • Function
    • Inspection Procedure
  • CONSULT-III Reference Value in Data Monitor Mode
• Trouble Diagnosis - Specification Value
  • Description
  • Testing Condition
  • Inspection Procedure
  • Diagnostic Procedure
    • Overall Sequence
    • Detailed Procedure
• Trouble Diagnosis For Intermittent Incident
  • Description
  • Diagnostic Procedure
• Power Supply And Ground Circuit
  • Wiring Diagram
  • Diagnostic Procedure
  • Ground Inspection