Symptom Troubleshooting [Engine]

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
- On-Board Refueling Vapor Recovery (ORV) Evaporative Emission (EVAP) System
- Exhaust Gas Recirculation (EGR) System Monitor
- Fuel System Monitor
- Typical Fuel System Monitor Entry Conditions:
- Typical Fuel Monitor Malfunction Thresholds:
- Heated Oxygen Sensor (HO2S) Monitor
- Misfire Detection Monitor
- Malfunction Indicator Lamp (MIL)
Electronic Engine Control (EEC) System
- Notes
- Powertrain Control Software
- Powertrain Control Hardware
  - Smart Junction Box (SJB)
- Power and Ground Signals
- Fuel Systems
  - Mechanical Returnless Fuel System
- Exhaust Gas Recirculation Systems
- Evaporative Emissions System Outline
  - Overview
- Intake Air Systems
- Positive Crankcase Ventilation System
  - Overview
- Catalyst and Exhaust Systems
  - Overview
- Communication Error
- Vehicle Check/Preparation
  - Visual Checks
  - Vehicle Preparation
- Intermittent Diagnostic Techniques
- On-Board System Readiness
  - Description
- Freeze Frame Data
  - Description
- Output Test Mode
  - Description
- Powertrain Control Module (PCM) Reset
On-Board Diagnostic Tests
- On-Board Diagnostic (OBD) Test Description
Drive Cycles
- 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:
DTC Index - Powertrain Control Module (Pcm)
DTC Application Chart - Powertrain Control Module (Pcm)
Pcm Quick Test
- Notes
- DTC P0102, P0103, P1100 & P1101: Mass Air Flow (MAF) Sensor
- DTC P0107, P0108 & P0109: Manifold Absolute Pressure (Map) Sensor Malfunction (2.3L)
- DTC P0112, P0113, P0117, P0118, P0125, P1112, P1116, P1117, P1285, P1288, P1289, P1290 & P1299: Intake Air Temperature (IAT) Sensor And Engine Coolant Temperature (ECT)/Cylinder Head Temperature (CHT) Sensor
- DTC P0121, P0122, P0123, P1120, P1121, P1124 & P1125: Throttle Position (TP) Sensor Circuit Malfunction
- DTC P0131 & P0151: Heated Oxygen Sensor (Ho2S)
- DTC P0133 & P0153: Heated Oxygen Sensors (Ho2S) Upstream
- DTC P0135, P0141 & P0155: Heated Oxygen Sensor (Ho2S) Heater Circuit
- DTC P0136, P1137 & P1138: Heated Oxygen Sensor (Ho2S)
- DTC P0171 & P0174: Adaptive Fuel Control
- DTC P0172 & P0175: Adaptive Fuel Control
- DTC P0201, P0202, P0203, P0204, P0205 & P0206: Fuel Injector Malfunction
- DTC P0230, P0231 & P0232: Fuel Pump (FP) Primary Or Secondary Circuit
- DTC P0300, P0301, P0302, P0303, P0304, P0305 & P0306: Misfire Detection Monitor
- DTC P0320: Crankshaft Position (CKP) Sensor Malfunction
- DTC P0325 & P0326: Knock Sensor Malfunction
- DTC P0340: Camshaft Position (CMP) Sensor Malfunction
- DTC P0350: Ignition Coil Primary Circuit Malfunction
- DTC P0351, P0352, P0353 & P0354: Integrated Ignition Coil 1, 2, 3, Or 4 Failure
- DTC P0400, P0403 & P1408: Electric EGR (EEGR) System Malfunction - 2.3L
- DTC P0420 & P0430: Catalyst Efficiency Monitor Malfunction
- DTC P0442: Evaporative Emission (EVAP) Monitor And System Malfunction
- DTC P0443: Evaporative Emission (EVAP) Canister Purge Solenoid Malfunction
- DTC P0461: EVAP System Malfunction
- DTC P0452: Fuel Tank Pressure (Ftp) Sensor Malfunction
- DTC P0453: Fuel Tank Pressure (Ftp) Sensor Malfunction
- DTC P0455 & P1443: Evaporative Emission (EVAP) System Malfunction
- DTC P0457: Evaporative Emission (EVAP) System Malfunction
- DTC P0460: Fuel Level Input (FLI) Circuit Malfunction
- DTC P0505, P1504 & P1507: Idle Air Control (IAC) Valve Assembly Malfunction
- DTC P0603 & P1633: Powertrain Control Module (Pcm) Malfunction
- DTC P0703 & P1703: Brake Pedal Position (BPP) Switch Malfunction
- DTC P0704 & P1709: Clutch Pedal Position (CPP) Switch Malfunction
- DTC P1000: OBD-II Drive Cycle Malfunction
- DTC P1001: Data Link Connector (DLC) Malfunction
- DTC P1127: Ho2S Heater(S)
- DTC P1128: Heated Oxygen Sensor Ho2S Signals (V6 Only)
- DTC P1130 & P1150: Fuel System Not Switching At Fuel Trim (Rich Or Lean)
- DTC P1131 & P1151: Heated Oxygen Sensor (Ho2S) Upstream Not Switching
- DTC P1132 & P1152: Heated Oxygen Sensor (Ho2S) Upstream Not Switching
- DTC P1260: Anti-Theft System
- DTC P1270: Engine Rpm/Vehicle Speed Limiter
- DTC P1309: Misfire Detection Monitor Disabled
- DTC P1432: Thermostat Heater Control (THTRC) Malfunction (2.3L)
- DTC P1450: Evaporative Emission (EVAP) Monitor And System
- DTC P1451: Canister Vent (CV) Solenoid Malfunction
- DTC P1460: A/C Clutch Relay (ACCR) Malfunction
- DTC P1464: A/C Control Signal (ACCS) Malfunction
- DTC P1474: Cooling Fan Malfunction (2.3L)
- DTC P1506: Idle Air Control (IAC) System Malfunction
- DTC P1518, P1519, P1520, P1537 & P1538: Intake Manifold Swirl Control (IMSC) Malfunction (2.3L)
- DTC P1650 & P1651: Power Steering Pressure (PSP) Switch (2.3L Only) Malfunction
- DTC P1729 & P1781: Transfer Case Range Malfunction - 4X4 Low (4X4L)
- DTC P1780: Transmission Control Switch (TCS) Or Transmission Control Indicator Lamp (TCIL) Circuit Malfunction
Symptom Troubleshooting Chart Engine DRIVEABILITY
- Notes
- Starting Concerns
- Hard Start/Long Crank/Erratic Start/Erratic Crank
- Cranks Normally 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
- Emissions Compliance
- Mil/TCIL Never On And Mil/TCIL Always On
- Automatic Transmission Shift Concerns
- Instrumentation
- Exhaust System Concerns
- Fuel Odor In Engine Compartment
- Engine Noise
- A/C Does Not Work
- A/C Always On And A/C Compressor Runs Continuously
- A/C Does Not Cut-Off Under Wide Open Throttle Conditions
- Exterior Lighting Systems
- Exhaust Sulphur Smell
- All Supported On Board System Readiness Tests Not Completed
- Fuel Pump Always Runs
Engine Inspection
Engine Component Test
- Engine Oil Leaks - Fluorescent Oil Additive Method
- Leakage Points - Underhood
- Leakage Points - Under Engine, With Vehicle on Hoist
- Leakage Points - With Transmission and Flywheel Removed
- Compression Test
- Compression Test - Results
- Compression Test - Interpreting Compression Readings
- Cylinder Leakage Detection
- Oil Leak and Valve Stem Seal Test
- Oil Consumption Test
- Excessive Engine Oil Consumption
- Intake Manifold Vacuum Test
- Intake Manifold Vacuum Test - Interpreting Vacuum Gauge Readings
- Oil Pressure Test
- Valve Train Analysis - Engine Off
- Valve Train Analysis - Engine Off, Valve Cover Removed
- Valve Train Analysis - Engine Off, Valve Tappets
- Valve Train Analysis - Engine Off, Camshaft - Overhead Camshaft Engines
- Valve Train Analysis - Engine Off, Valve Springs
- Valve Train Analysis - Engine Off, Valve Spring Retainer and Valve Spring Retainer Keys
- Valve Train Analysis - Engine Off, Valves and Cylinder Head
- Valve Train Analysis - Engine Running
- Valve Train Analysis - Engine Running, Rocker Arm
- Camshaft Lobe Lift
- Camshaft Lobe Lift - Valve Tappet, 2.3L, 3.0L and 4.0L Engines
- Timing Chain - 2.3L, 3.0L and 4.0L Engines
- Timing Chain Deflection - 2.3L, 3.0L and 4.0L Engines
Charging System 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 Condition Test
Symptom Troubleshooting Chart - Engine Mechanical
Symptom Troubleshooting Chart - Drive Belt
Symptom Troubleshooting Chart - Engine Cooling
- Engine Cooling
- Cooling System Pinpoint Test 1: Loss Of Coolant
- Cooling System Pinpoint Test 2: Engine Overheats
- Cooling System Pinpoint Test 3: Engine Does Not Reach Normal Operating Temperature
- Cooling System Pinpoint Test 4: Block Heater Does Not Operate Properly
Exhaust System Symptom Chart
- Notes
- Exhaust System Pinpoint Test 1: Restricted Exhaust System Test
Evaporative Emission System Inspection
Evaporative Emission Symptom Chart
- Notes
- Pinpoint Test 1: Excessive Fuel Odor
- Evaporative Emissions System Pinpoint Test 2: Hiss When Opening Fuel Cap
- Evaporative Emissions System Pinpoint Test 3: Unable To Refuel Vehicle
Symptom Troubleshooting Chart-Charging System
- Notes
- Charging System Pinpoint Test 1: The Battery Is Discharged Or Battery Voltage Is Low
- Charging System Pinpoint Test 2: The Charging System Warning Indicator Is On With The Engine Running (The Charging System Voltage Does Not Increase)
- Charging System Pinpoint Test 3: The Charging System Overcharges (Battery Voltage Is Greater Than 15.5 Volts)
- Charging System Pinpoint Test 4: The Charging System Warning Indicator Is On With The Engine Running And The Battery Increases Voltage
- Charging System Pinpoint Test 5: The Charging System Warning Indicator Is Off With The Ignition Switch In The Run Position And The Engine Off
- Charging System Pinpoint Test 6: The Charging System Warning Indicator Flickers Or Is Intermittent
- Charging System Pinpoint Test 7: Generator Is Noisy
- Charging System Pinpoint Test 8: Radio Interference
Symptom Troubleshooting Chart - Starting System
- Symptom Troubleshooting Chart
Symptom Troubleshooting Chart - Cruise Control
- Cruise Control Self-Test Diagnostics
- Symptom Troubleshooting Chart
Symptom Troubleshooting Chart-Powertrain Control Module (Pcm)
General Test Index
- Notes
- General Pinpoint Test 1: Vehicle Reference Voltage
- General Pinpoint Test 2: Tachometer Output (CTO) Failure
- General Pinpoint Test 3: Malfunction Indicator Lamp (Mil)
- General Pinpoint Test 4: Intermittent
- General Pinpoint Test 5: Fuel Delivery System
- General Pinpoint Test 6: Positive Crankcase Ventilation PCV System
- General Pinpoint Test 7: Pcm Power Relay
- General Pinpoint Test 8: Crankshaft Position (CKP) Sensor
- General Pinpoint Test 9: Fuel Pump Inspection
- Pinpoint Test 10: Fuel Line Pressure/Fuel Pressure Hold Inspection
- General Pinpoint Test 11: Fuel Injector Inspection
- General Pinpoint Test 12: No Start
- General Pinpoint Test 13: Ignition Scope Pinpoint Test