Symptom Troubleshooting [Engine Control System LF 2.0L]

• Symptom Troubleshooting Wiring Diagram [LF]
• Foreword [LF]
• Symptom Diagnostic Index [LF]
• Quick Diagnostic Chart [LF]
• No. 1 Melting Of Main Or Other Fuses [LF]
• No. 2 Mil Illuminates [LF]
• No. 3 Will Not Crank [LF]
• No. 4 Hard To Start/Long Crank/Erratic Start/Erratic Crank [LF]
• No. 5 Engine Stalls-After Start/At Idle [LF]
• No. 6 Cranks Normally But Will Not Start [LF]
• No. 7 Slow Return To Idle [LF]
• No. 8 Engine Runs Rough/Rolling Idle [LF]
• No. 9 Fast Idle/Runs On [LF]
• No. 10 Low Idle/Stalls During Deceleration [LF]
• No. 11 Engine Stalls/Quits, Engine Runs Rough, Misses, Buck/Jerk, Hesitation/Stumble, Surges [LF]
• No. 12 Lack/Loss Of Power-Acceleration/Cruise [LF]
• No. 13 Knocking/Pinging-Acceleration/Cruise [LF]
• No. 14 Poor Fuel Economy [LF]
• No. 15 Emission Compliance [LF]
• No. 16 High Oil Consumption/Leakage [LF]
• No. 17 Cooling System Concerns-Overheating [LF]
• No. 18 Cooling System Concerns-Runs Cold [LF]
• No. 19 Exhaust Smoke [LF]
• No. 20 Fuel Odor (In Engine Compartment) [LF]
• No. 21 Engine Noise [LF]
• No. 22 Vibration Concerns (Engine) [LF]
• No. 23 A/C Does Not Work Sufficiently [LF]
• No. 24 A/C Is Always On Or A/C Compressor Runs Continuously [LF]
• No. 25 A/C Is Not Cut Off Under Wide Open Throttle Conditions [LF]
• No. 26 Exhaust Sulphur Smell [LF]
• No. 27 Fuel Refill Concerns [LF]
• No. 28 Fuel Filling Shut Off Concerns [LF]
• No. 29 Spark Plug Condition [LF]
• Intermittent Concern Troubleshooting [LF]
  • Vibration Method
  • Inspection Method for Switch Connectors or Wiring Harnesses
  • Inspection Method for Sensor Connectors or Wiring Harnesses
  • Inspection Method for Sensors
  • Inspection Method for Actuators or Relays
  • Water Sprinkling Method
• Engine Control System Operation Inspection [LF]
  • Input Signal System Inspection Procedure
  • Finding Irregular Signals
  • Locating The Source Of Unusual Signals
  • Variable Resistance Type T (TP Sensor and APP Sensor)
  • Input Signal System Inspection for Variable Resistance Type 1
  • Standard Power Supply System Inspection for Variable Resistance Type 1
  • Ground System Inspection for Variable Resistance Type 1
  • Variable Resistance Type 2 (MAF Sensor)
  • Ground System Inspection for Variable Resistance Type 2
  • Input Signal System Inspection for Variable Resistance Type 2
  • Electrical Supply System Inspection for Variable Resistance Type 2
  • Thermistor Type (IAT Sensor and ECT Sensor)
  • Input Signal System Inspection for Thermistor Type
  • Ground System Inspection for Thermistor Type
  • Main Relay Operation Inspection
  • Intake Manifold Vacuum Inspection
  • Electronic Throttle Control System Inspection
    • Engine coolant temperature compensation inspection
  • Load Compensation Inspection
  • Throttle Position (TP) Sweep Inspection
  • Brake Override System Operation Inspection
  • Variable Intake Air Control Operation Inspection
  • Variable Tumble Control Operation Inspection
  • Fuel Injector Operation Inspection
  • Fuel Cut Control System Inspection
  • Fuel Pump Operation Inspection
  • Fuel Pump Control System Inspection
  • Spark Test
  • EGR Control System Inspection
  • Purge Control System Inspection
  • A/C Cut-off Control System Inspection
  • Cooling Fan Control System Inspection
  • Variable Valve Timing Control System Operation Inspection
  • Evaporative Emission (EVAP) System Leak Inspection
  • EVAP System Leak Inspection Using M-MDS
  • Evaporative System Test Procedure
  • EVAP System Leak Inspection Using Leak Tester