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
- Powertrain Control Hardware
- Power and Ground Signals
- Fuel Systems
- Exhaust Gas Recirculation Systems
- Evaporative Emissions System Outline
- Intake Air Systems
- Catalyst and Exhaust Systems Overview
- Communication Error
- Positive Crankcase Ventilation System Overview
- Vehicle Check/Preparation
- Intermittent Diagnostic Techniques
- On-Board System Readiness
- Freeze Frame Data
- Output Test Mode
- Powertrain Control Module (PCM) Reset
- On-Board Diagnostic Tests - WDS
- 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
- Evaporative Emission System
- Evaporative Emission System
- 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
- Charging System
- Battery
- Starting System
- 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