Engine Controls - 1.6L (L91) - Symptom Troubleshooting And Diagnosis

• Symptoms - Engine Controls
  • Important Preliminary Checks Before Starting
• Intermittent Conditions
• Hard Start
• Surges/Chuggles
• Lack of Power, Sluggishness, or Sponginess
• Detonation/Spark Knock
• Hesitation, Sag, Stumble
• Cuts Out, Misses
• Poor Fuel Economy
• Rough, Unstable, or Incorrect Idle and Stalling
• Dieseling, Run-On
• Backfire
• Malfunction Indicator Lamp (MIL) Inoperative
  • Circuit Description
  • Diagnostic Aids
• Malfunction Indicator Lamp (MIL) Always On
  • Circuit Description
  • Test Description
• Engine Cranks But Does Not Run
  • Description
  • Diagnostic Aids
  • Test Description
• Engine Control Module Outputs Diagnosis
  • Circuit Description
  • Diagnostic Aids
• Multiple Engine Control Module Information Sensor DTCs Set
  • Circuit Description
  • Diagnostic Aids
  • Test Description
• Main Relay Circuit Diagnosis
  • Circuit Description
  • Diagnostic Aids
• Fuel System Diagnosis
  • Circuit Description
  • Test Description
• Fuel Pump Electrical Circuit Diagnosis
  • Circuit Description
  • Diagnostic Aids
  • Test Description
• Fuel Injector Solenoid Coil Test
  • Circuit Description
  • Diagnostic Aids
• Fuel Injector Balance Test with Special Tool
  • System Description
  • Test Description
• Alcohol/Contaminants-in-Fuel Diagnosis (w/o Special Tool)
  • Description
  • Alcohol in Fuel Testing Procedure
  • Particulate Contaminants in Fuel Testing Procedure
• Alcohol/Contaminants-in-Fuel Diagnosis (w/Special Tool)
  • Description
  • Test Procedure
• Intake Manifold Tuning Valve Diagnosis
  • Circuit Description
  • Test Description
• Electronic Ignition System Diagnosis
  • Circuit Description
  • Test Description