[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 13. The Feeling of Impact or Vibration when AcceleratingPRINT PAGE / INDEX / PRIOR / NEXT
Inspection Procedure 13. The Feeling of Impact or Vibration when Accelerating
COMMENT ON TROUBLE SYMPTOM
  • Failure is possibly caused by failed ignition leak with rise in spark plug-required voltage at acceleration, throttle valve opening control system.
PROBABLE CAUSE
  • Failed ignition system
  • Failed throttle valve opening control system
  • Failed engine-A/T-ECU
DIAGNOSIS PROCEDURE
STEP 1. MUT-II/III diagnosis code
Q: Diagnosis code set?
YES:  Inspection chart for diagnosis code (Refer to ).
NO:  Go to Step 2 .
STEP 2. MUT-II/III data list
    1. Item 14: Throttle position sensor (sub)
    1. Item 77: Accelerator pedal position sensor (sub)
    1. Item 78: Accelerator pedal position sensor (main)
    1. Item 79: Throttle position sensor (main)
Q: Are the check results normal?
YES:  Go to Step 3 .
NO:  Perform the diagnosis code classified check procedure for the sensor that has shown an abnormal data value (Refer to Inspection Chart for Diagnosis Code ).
STEP 3. Check ignition coil spark.
Q: Is the check result normal?
YES:  Replace engine-A/T-ECU.
NO:  Check ignition circuit system (Refer to Inspection Procedure 30 ).
[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 13. The Feeling of Impact or Vibration when AcceleratingPRINT PAGE / INDEX / PRIOR / NEXT
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