On Board Diagnostics - 4.2L V8

• 2 Introduction
  • Notes
  • 2.1 Inputs and Outputs
• Diagnostic Trouble Codes
• 3 Mode $06 Data
  • 3.1 Functional Description
    • Notes
    • 3.1.1 Reporting of On-Board Diagnostic Monitor ID test values in response to $06 $00 request
    • 3.1.2 Reporting of On-Board Diagnostic Monitor ID test values in response to $06 $01 - $FF request
    • 3.1.3 Unit and Scaling ID definition
    • 3.1.4 Test Result Description
    • 3.1.5 Using Table 5
    • 3.1.6 Example for Use of Standardized Test IDs for Misfire Monitor
• 4 Onboard Monitoring
  • 4.1 Catalyst Monitoring
    • 4.1.1 Description
    • 4.1.2 Monitoring Structure
  • 4.2 Misfire Monitoring
    • 4.2.1 Description
    • 4.2.2 Misfire Monitor Process Hierarchy
    • 4.2.3 Strategy Description
      • Introduction
      • Recording segment time and position, and its manipulation
      • Adjustment of crank angle tolerance
      • Misfire 'signal' calculation
      • Misfire judgement
      • Catalyst damage judgement
      • Storing adaption values in back-up memory
      • Excess emissions judgement
      • Monitor execution check
      • Adaptive learning execution check
      • Rough road and low fuel level judgement
    • 4.2.4 Misfire Malfunction Criteria
    • 4.2.5 Misfire Enable Criteria
  • 4.3 Evaporative Emission System Monitoring
    • 4.3.1 Schematic
    • 4.3.2 Description
    • 4.3.3 Typical monitoring results
    • 4.3.4 Monitoring Structure
    • 4.3.5 Diagnosis Frequency and MIL Illumination
    • 4.3.6 Evaporative Emission Canister Purge Valve Description
      • Purge Valve Electrical Monitoring
    • 4.3.7 Purge Flow Monitoring Structure
  • 4.4 Secondary Air System (AIR) Monitoring
    • 4.4.1 System Schematic
    • 4.4.2 Description
      • 4.4.2.1 Pressure Measurement Method - P0411, P2444 and P2445
      • 4.4.2.2 Exhaust Gas Oxygen Content Method - P0491 and P0492
        • Notes
        • Pressure Measurement Flowchart
        • Exhaust Gas Oxygen Content Method
    • 4.4.3 Monitoring Structure
  • 4.5 Fuel System Monitoring
    • 4.5.1 Description
    • 4.5.2 Monitoring Structure
  • 4.6 Exhaust Gas Recirculation (EGR) Monitoring
    • 4.6.1 Description
      • EGR Valve Range or Performance Failure
    • 4.6.2 Monitoring Structure
  • 4.7 Oxygen Sensor Monitoring
    • 4.7.1 Upstream Oxygen Sensor High Low Monitor
    • 4.7.2 Upstream Oxygen Sensor Slow Response
    • 4.7.3 Upstream Oxygen Sensor Slow Activation
    • 4.7.4 Downstream Oxygen Sensor High or Low Monitor
    • 4.7.5 Downstream Oxygen Sensor Stuck Monitor
    • 4.7.6 Downstream Oxygen Sensor Rationality Check
  • 4.8 Cold Start Emission Reduction Monitoring
    • 4.8.1 Description
  • 4.9 Thermostat Monitoring
    • 4.9.1 System Schematic
    • 4.9.2 Description
  • 4.10 Positive Crankcase Ventilation (PCV) System Monitoring
    • 4.10.1 Description
  • 4.11 Idle Speed Control (ISC)
    • 4.11.1 Description
    • 4.12 Crankshaft Position Sensor
      • 4.12.1 Description
  • 4.13 Camshaft Position Sensors
    • 4.13.1 Description
  • 4.14 Engine Coolant Temperature Sensor
    • 4.14.1 Description
      • Sensor Stuck
      • Range or Performance Failure
      • Time to Closed Loop Fuelling
    • 4.14.2 Range/Performance Monitoring Structure
  • 4.15 Manifold Absolute Pressure Sensor
    • 4.15.1 High or Low Input Failure and Ground Monitor
      • Notes
      • 4.15.1.1 High or low input failure - P0107, P0108
      • 4.15.1.2 Range or performance failure - P0106
    • 4.15.2 Monitoring Structure
  • 4.16 Mass Airflow Sensor
    • Notes
    • 4.16.1 High or low input failure
    • 4.16.2 Range or performance failure
    • 4.16.3 Monitoring Structure
  • 4.17 Barometric Pressure Sensor
    • Notes
    • 4.17.1 High/Low Input Failure
    • 4.17.2 Range/Performance Failure
  • 4.18 Fuel Rail Pressure Sensor
    • 4.18.1 Description
  • 4.19 Intake Air Temperature Sensor
    • Notes
    • 4.19.1 Sensor Stuck in Range
    • 4.19.2 Intake Air Temperature Sensor - Biased Sensor
    • 4.19.3 Monitoring Structure
  • 4.20 Engine Oil Temperature Sensor
    • 4.20.1 Sensor Stuck
    • 4.20.2 Range or Performance Failure
    • 4.20.3 Monitoring Structure
  • 4.21 Fuel Rail Temperature (FRT) Sensor
    • 4.21.1 Sensor Stuck
    • 4.21.2 Range or Performance Failure
    • 4.21.3 Monitoring Structure
  • 4.22 Knock Sensor
    • 4.22.1 Description
  • 4.23 ECM Power Supplies
    • 4.23.1 Description
  • 4.24 Engine Control Module Self Test
    • 4.24.1 Description
  • 4.25 Engine Starting
    • 4.25.1 Crank request Signal
    • 4.25.2 Park/Neutral Switch
    • 4.25.3 Starter relay
  • 4.26 Accelerator Pedal Position Sensor
    • 4.26.1 Description
  • 4.27 Throttle Control System
    • 4.27.1 Description
  • 4.28 Torque Monitoring
    • 4.28.1 Description
  • 4.29 Vehicle Speed Signal
    • 4.29.1 Description
  • 4.30 Fuel Injectors
    • 4.30.1 Description
  • 4.31 Ignition Amplifiers/Coils
    • 4.31.1 Description
  • 4.32 Variable Valve Timing
    • Notes
    • 4.32.1 Hardware Check
    • 4.32.2 Camshaft Position
  • 4.33 Controller Area Network System
    • Notes
    • 4.33.1 Monitoring Structure
  • 4.34 Fuel Level Sensor
  • 4.35 Engine Off Timer
    • 4.35.1 Description
  • 4.36 Ambient Air Temperature
    • 4.36.1 Description
      • Notes
      • Rationality Check
      • Range/Performance