Symptom Troubleshooting [Engine Control System]

• Foreword
• Engine OBD II Monitors
  • Notes
  • Catalyst Efficiency Monitor - Federal Test Procedure
  • Comprehensive Component Monitor
  • Evaporative Emission (EVAP) Vapor Management Flow System Monitor
  • Evaporative Emission (EVAP) Running Loss System Monitor
  • Exhaust Gas Recirculation (EGR) System Monitor - Differential Pressure Feedback EGR
  • Fuel System Monitor
  • Heated Oxygen Sensor (HO2S) Monitor
  • Misfire Detection Monitor
  • Malfunction Indicator Lamp (MIL)
• Electronic Engine Control (EEC) System
  • Overview
  • Modifications to OBD II Vehicles
  • Powertrain Control Software
    • Communications
    • Flash Electrically Erasable Programmable Read Only Memory
    • Idle Air Trim
    • Fuel Trim
    • Failure Mode Effects Management
    • Engine RPM/Vehicle Speed Limiter
  • Powertrain Control Hardware
    • Keep Alive Random Access Memory (RAM)
    • Hardware Limited Operation Strategy (HLOS)
    • Integrated Electronic Ignition System
  • Power and Ground Signals
    • Vehicle Power
    • Vehicle REFERENCE Voltage
    • Mass Air Flow Return
    • Signal Return
    • Power Ground
    • Gold Plated Pins
  • Fuel Systems
    • Mechanical Returnless Fuel System
  • Exhaust Gas Recirculation Systems
    • Overview
    • Differential Pressure Feedback EGR System
  • Evaporative Emissions System Outline
    • Overview
  • Intake Air Systems
  • Catalyst and Exhaust Systems Overview
  • Communication Error
  • Positive Crankcase Ventilation System Overview
  • Vehicle Check/Preparation
    • Visual Checks
    • Vehicle Preparation
  • Intermittent Diagnostic Techniques
    • Notes
    • Re-creating the Fault
    • Accumulating PCM Data
    • Analyzing Data From Playback of Stored PIDs
    • Comparing PCM Data
    • Diagnostic Monitoring Test Results
  • On-Board System Readiness
    • Description
  • Freeze Frame Data
    • Description
  • Output Test Mode
    • Description
  • Powertrain Control Module (PCM) Reset
    • Description
      • Notes
      • Resetting Keep Alive Random Access Memory (RAM)
• On-Board Diagnostic Tests - WDS
  • On-Board Diagnostic (OBD) Test Description
    • Notes
    • System Pass
    • Key On, Engine OFF (KOEO) On-Demand Self-Test
    • Key ON, Engine Running (KOER) On-Demand Self-Test
    • Continuous Memory Self-Test
    • Parameter Identification (PID) Access
    • Brake On/Off Test
    • Transmission Control (O/D OFF) Switch Test
    • Power Steering Pressure (PSP) Switch Test
  • On-Board Diagnostic Test
    • DTCs Reading Procedure
    • Pending Trouble Code Access Procedure
    • Freeze Frame PID Data Access Procedure
    • On-Board System Readiness Tests Access Procedure
    • PID/DATA Monitor and Record Procedure
    • Diagnostic Monitoring Test Results Access Procedure
      • Notes
      • After Repair Procedure
• Drive Cycle
  • Description of OBD II Drive Cycle
  • Drive Cycle Recommendations
  • Vehicle Preparation
  • OBD II Drive Cycle
  • Monitor Repair Verification Drive Cycles
    • Comprehensive Component Monitor Repair Verification Drive Cycle
    • EGR Monitor Repair Verification Drive Cycle
    • HO2S Monitor Repair Verification Drive Cycle:
    • Fuel or Misfire Monitor Repair Verification Drive Cycle:
    • EVAP Running Loss System Repair Verification Drive Cycle:
    • Catalyst Monitor Repair Verification Drive Cycle:
• Diagnostic Trouble Code Numbers
• Diagnostic Trouble Code Application Chart
• Pcm Quick Test
• Mass Air Flow (MAF) Sensor
• Intake Air Temperature (IAT) Sensor And Engine Coolant Temperature (ECT) Sensor / Cylinder Head Temperature (CHT) Sensor
• Throttle Position (TP) Sensor Circuit Malfunction
• Manifold Absolute Pressure (Map) Sensor
• Fuel Rail Pressure Temperature (FRPT) Sensor
• Intake Manifold Runner Control (IMRC) System
• Heated Oxygen Sensor (Ho2S)
• Heated Oxygen Sensor (Ho2S) Over Voltage
• Upstream Heated Oxygen Sensor (Ho2S)
• Heated Oxygen Sensor (Ho2S) Heater Circuit
• Downstream Heated Oxygen Sensor (Ho2S)
• Adaptive Fuel Control
• Fuel Injector Malfunction
• Fuel Pump (FP) Primary Or Secondary Circuit
• Misfire Detection Monitor
• Crankshaft Position (CKP) Sensor Malfunction
• Knock Sensor Malfunction
• Camshaft Position Sensor (CMP) Malfunction
• Ignition Coil Primary Circuit Malfunction
• Integrated Ignition Coil 1, 2, 3, 4, 5, Or 6 Failure
• EGR System Malfunction - 3.0L
• EGR System Malfunction - 2.3L
• Catalyst Efficiency Monitor Malfunction
• Evaporative Emission (EVAP) Monitor And System Malfunction
• Evaporative Emission (EVAP) Canister Purge Solenoid Malfunction
• EVAP System Malfunction
• Fuel Tank Pressure (Ftp) Sensor Malfunction
• Evaporative Emission (EVAP) System Malfunction
• Idle Air Control (IAC) Valve Assembly Malfunction
• Powertrain Control Module (Pcm) Malfunction
• Brake Pedal Position (BPP) Switch Malfunction
• Clutch Pedal Position (CPP) Switch Malfunction
• OBD II Drive Cycle Malfunction
• Data Link Connector Malfunction
• Ho2S Heater(S)
• Heated Oxygen Sensor (Ho2S) Signals
• Fuel System Not Switching At Fuel Trim (Rich Or Lean)
• Upstream Heated Oxygen Sensor (Ho2S) Not Switching
• Generator/Regulator System Malfunction
• Anti-Theft System
• Engine Rpm/Vehicle Speed Limiter
• Misfire Detection Monitor Disabled
• Differential Pressure Feedback (DPFEGR) Sensor Malfunction
• EGR Vacuum Regulator (EGRVR) Solenoid Circuit Malfunction
• Evaporative Emission (EVAP) Monitor And System
• Canister Vent (CV) Solenoid Malfunction
• A/C Clutch Relay (ACCR) Malfunction
• A/C Control Signal (ACCS) Malfunction
• A/C Pressure Sensor (ACP) Malfunction
• Cooling Fan Malfunction
• Idle Air Control (IAC) System Malfunction
• Power Steering Pressure (PSP) Switch Malfunction
• Diagnostic Index
• Starting Concerns
• Hard Start / Long Crank / Erratic Start / Erratic Crank
• Cranks Normal But Will Not Start
• Unique Idle Concern
• Fast Idle
• Low Idle/Stalls During Deceleration
• Engine Poor DRIVEABILITY
• Backfires
• Lack / Loss Of Power
• Knocking / Pinging
• Poor Fuel Economy
• Emission Compliance
• Mil/TCIL Never On And Mil/TCIL Always On
• Exhaust System Concerns
• Fuel Odor In Engine Compartment
• Engine Noise
• Exhaust Sulfur Smell
• All Supported On Board System Readiness Tests Not Completed
• Fuel Pump Always On
• Engine Inspection
• Engine
  • Inspection and Verification
  • Component Tests
    • Engine Oil Leaks
    • Fluorescent Oil Additive Method
  • Compression Test
    • General Remarks
    • Check The Compression Pressure
    • Interpretation of the Results
  • Excessive Engine Oil Consumption
  • Oil Consumption Test
  • Intake Manifold Vacuum Test
    • Notes
    • Interpreting Vacuum Gauge Readings
• Evaporative Emission System
  • Evaporative Emission System
    • 3.0L Engine
    • 2.3L Engine
  • Principles of Operation
    • Fuel Filler Cap
    • Fuel Vapor Recirculation Tube
    • Fuel Vapor Control Valve (3.0L engine only)
    • Fuel Tank Pressure (FTP) Sensor
    • Evaporative Emission (EVAP) Vapor Management Valve
    • Canister Vent Solenoid
    • Evaporative Emission (EVAP) Check Valve
    • Dust Separator
    • Evaporative Emission (EVAP) Canister
    • Fuel Vapor Vent Valve (FVV) Assembly
    • Fuel Filler Pipe Check Valve
    • Evaporative Emission System Monitor
    • EVAP Running Loss System Leak Test
  • Inspection and Verification
• Evaporative Emission System Leak Test
• Evaporative Emission Repair Verification Drive Cycle
• Canister Vent Solenoid Closing Procedure
• Acceleration Control
  • Notes
  • Inspection and Verification
• Charging System
  • Notes
  • Principles of Operation
    • Notes
    • Functionality (Duratec engine only)
      • Notes
      • Battery Positive Output (B+) Terminal Circuit 38 (B/O) (2.3L)
      • Battery Positive Output (B+) Terminal Circuit 36 (Y/W) (3.0L)
      • A Circuit 112 (B/Y)
      • Circuit 921 (GY/O)
      • Circuit 920 (BR/W)
  • Inspection and Verification
  • Component Tests
    • Battery - Load Test
    • Battery - Drain Tests
    • Battery - Electronic Drains Which Shut Off When the Battery Cable is Disconnected
    • Generator On-Vehicle Tests
    • Generator On-Vehicle Tests - Load Test
    • Generator On-Vehicle Tests - No Load Test
• Battery
  • Inspection and Verification
• Starting System
  • Inspection and Verification
  • Component Tests
    • Starter Motor - Motor Feed Circuit
    • Starter Motor - Ground Circuit Test
• Symptom Troubleshooting Chart - Engine
• Symptom Troubleshooting Chart - Drive Belts
• Symptom Troubleshooting Chart - Engine Cooling System
• Pinpoint Test 1: Loss Of Coolant
• Pinpoint Test 2: The Engine Overheats
• Pinpoint Test 3: The Engine Does Not Reach Normal Operating Temperature
• Pinpoint Test 4: Engine Cooling Fan(S) Inoperative/Incorrect Operation - 2.3L
• Pinpoint Test 5: The Block Heater Does Not Operate Correctly
• Symptom Troubleshooting Chart - Fueling
• Pinpoint Test 1: Hiss When Opening Fuel Cap
• Pinpoint Test 2: Excessive Fuel Odor
• Pinpoint Test 3: Unable To Refuel (ORVR)
• Symptom Troubleshooting Chart - Accelerator
• Symptom Troubleshooting Chart - Charging System
• Pinpoint Test 1: Battery Is Discharged Or Voltage Is Low
• Pinpoint Test 2: The Charging System Warning Indicator Is On With The Engine Running (The System Voltage Does Not Increase)
• Pinpoint Test 3: The System Overcharges (Battery Voltage Is Greater Than 15.5 Volts)
• Pinpoint Test 4: The Charging System Warning Indicator Is On With The Engine Running And The Battery Increases Voltage
• Pinpoint Test 5: The Charging System Warning Indicator Is Off With The Ignition Switch In The Run Position And The Engine Off
• Pinpoint Test 6: The Generator Is Noisy
• Pinpoint Test 7: Radio Interference
• Pinpoint Test 8: Battery Condition Test
• Symptom Troubleshooting Chart - Starting System
• Pinpoint Test 1: The Engine Does Not Crank Or The Relay Clicks
• Pinpoint Test 2: Unusual Starter Noise
• Symptom Troubleshooting Chart - Speed Control
• Pinpoint Test 1: The Speed Control Is Inoperative
• Pinpoint Test 2: The Set Speed Fluctuates
• Pinpoint Test 3: The Speed Control Does Not Disengage When The Brakes Are Applied
• Pinpoint Test 4: The Speed Control Does Not Disengage When The Clutch Is Applied
• Pinpoint Test 5: The Speed Control Switch Is Inoperative
• Pinpoint Test 6: Flash With Last Switch Pressed, But No Dynamic Pull Occurs At Throttle And The Speed Control Is Inoperative
• Pinpoint Test 7: Flash Code 3 - DEACTIVATOR Switch Circuit Failure
• Pinpoint Test 8: Flash Code 4 - Clutch/Neutral Switch Circuit Failure
• Pinpoint Test 9: The Speed Control Indicator Lamp Is Always On
• Pinpoint Test 10: Flash Code 2 - Stop Switch Circuit Failure
• General Test Index
• Test 1: Vehicle Reference Voltage (VREF)
• Test 2: Malfunction Indicator Lamp (Mil)
• Test 3: Intermittent
• Test 4: Fuel Delivery System
• Test 5: Positive Crankcase Ventilation (PCV) System
• Test 6: Pcm Power Relay
• Test 7: Fuel Pressure Regulator
• Test 8: Fuel Pump Inspection
• Test 9: Fuel Line/Fuel Pressure Hold Inspection
• Test 10: Fuel Injector Inspection
• Test 11: EGR Valve - Vacuum
• Test 12: EGR Vacuum Regulator (EGRVR) Solenoid Inspection
• Test 13: Differential Pressure Feedback EGR (DPFE) Sensor
• Test 14: No Start
• Test 15: Ignition Scope Test