MULTIPORT Fuel Injection (MFI) - Symptom Procedures

• Symptom Procedures
  • Inspection procedure 1: Communication with ECM is not possible
    • Notes
    • Circuit Operation
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 2: The malfunction indicator lamp (SERVICE ENGINE SOON or check engine lamp) does not illuminate right after the ignition switch is turned to the "ON" position
    • Circuit Operation
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 3: The malfunction indicator lamp (SERVICE ENGINE SOON or check engine lamp) remains illuminated and never goes out
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 4: Cranks, won't start
    • Cranks, Won't Start Circuit
    • Circuit Operation
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 5: Starts up and dies
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 6: Hard starting
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 7: Unstable idle (rough idle, hunting)
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 8: Idle speed is high (improper idle speed)
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 9: Idle speed is low (improper idle speed) < M/T >
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 9: Idle speed is low (improper idle speed) < CVT >
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 10: When the engine is cold, it stalls at idle (die out)
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 11: When the engine is hot, it stalls at idle (die out)
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 12: The engine stalls when accelerating (pass out)
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 13: The engine stalls when decelerating
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 14: Hesitation, sag, stumble, poor acceleration or surge
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 15: Acceleration shock
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 16: Knocking
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 17: Dieseling (run-on)
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 18: Too high CO and HC concentration when idling
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 19: Transient, mass emission tailpipe test failure
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 20: Purge flow test of the evaporative emission canister failure
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 21: Pressure test of the evaporative system failure
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 22: Power supply system and ignition switch-IG system
    • Notes
    • Circuit Operation
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
    • Diagnosis
  • Inspection procedure 23: Fuel pump system
    • Notes
    • Circuit Operation
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
    • Diagnosis
  • Inspection procedure 24: Ignition switch-ST system and starter relay system < M/T >
    • Notes
    • Circuit Operation
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 25: Ignition switch-ST system and starter relay system < CVT >
    • Notes
    • Circuit Operation
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 26: Ignition circuit system
    • Notes
    • Circuit Operation
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 27: A/C system
    • Notes
    • Circuit Operation
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis
  • Inspection procedure 28: Engine oil pressure switch system
    • Notes
    • Circuit Operation
    • Comment
    • TROUBLESHOOTING HINTS (The most likely causes for this case:)
    • Diagnosis