Inspection Procedure 18: Odor, White Smoke, Black Smoke, and High-Concentration CO/HC during Idling


COMMENT ON TROUBLE SYMPTOM



PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

Q. Diagnosis code set?
Inspection chart for diagnosis code (Refer to ).
Go to Step 2 .

STEP 2. Check injector for operating sound.

  • Check injector for operating sound (Refer to ).

Q. Can operating sound be heard?
Go to Step 3 .

    Check the injector system of the defective cylinder.
    (Refer to, Code No. P0201: No. 1 injector system)
    (Refer to, Code No. P0202: No. 2 injector system)
    (Refer to, Code No. P0203: No. 3 injector system)

STEP 3. Check ignition timing.

  • Check ignition timing. (Refer to GROUP 11A - On-vehicle Service - Ignition Timing Check ).

Q. Is the check result normal?
Go to Step 4 .
Check for offset ignition timing (Refer to Inspection Procedure 16 ).

STEP 4. M.U.T.-III data list

  • Refer to Data List Reference Table .

    1. Item No. 6: Intake air temperature sensor
    2. Item No. 7: Manifold absolute pressure sensor
    3. Item No. 8: Engine coolant temperature sensor

Q. Are the check results normal?
Go to Step 5 .
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 5. Check for emission leakage from exhaust manifold.

Q. Is the check result normal?
Go to Step 6 .
Repair.

STEP 6. Check throttle body (throttle valve portion) for contamination.

Q. Is the check result normal?
Go to Step 7 .
Clean throttle body (throttle valve portion) (Refer to ).

STEP 7. M.U.T.-III data list

  • Refer to Data list reference table .

    1. Item No. 9: Oxygen sensor (front)
    2. Item No. 10: Oxygen sensor (rear)

Q. Are the check result normal?
Go to Step 8 .
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 8. Check purge control solenoid valve itself.

  • Check purge control solenoid valve itself (Refer to GROUP 17 - Emission Control System - Evaporative Emission Control System - Purge Control Solenoid Valve Check ).

Q. Is the check result normal?
Go to Step 9 .
Replace the purge control solenoid valve.

STEP 9. Measure fuel pressure.

  • Measure fuel pressure (Refer to ).

Q. Is the check result normal?
Go to Step 10 .
Repair the fuel pressure.

STEP 10. Check positive crankcase ventilation valve itself.

  • Check positive crankcase ventilation valve itself (Refer to GROUP 17 - Emission Control System - crankcase Emission Control System - Positive Crankcase Ventilation (PCV) Valve Check ).

Q. Is the check result normal?
Go to Step 11 .
Replace the positive crankcase ventilation valve.

STEP 11. Check spark plug.
Check spark plug itself (Refer to GROUP 16 - Ignition System - On-vehicle Service - Spark Plug Check and Cleaning <134>, <3A9>).

Q. Is the check result normal?
Go to Step 12 .
Replace the spark plug.

STEP 12. Check ignition coil itself.

  • Check ignition coil itself (Refer to GROUP 16 - Ignition System - On-vehicle Service - Ignition Coil Check <134>, <3A9>).

Q. Is the check result normal?
Go to Step 13 .
Replace the ignition coil.

STEP 13. Check compression pressure.

  • Check compression pressure (Refer to GROUP 11A - On-vehicle Service - Compression Pressure Check ).

Q. Is the check result normal?
Go to Step 14 .
Repair the compression pressure.

STEP 14. Check injector for spraying condition.

  • Check each injector for spray condition (Refer to ).

Q. Does trouble symptom persist?
Go to Step 15 .
Replace the injector.

STEP 15. Replace catalytic converter.

  • After replacing the catalytic converter, re-check the trouble symptoms.

Q. Does trouble symptom persist?
Replace the engine-ECU then perform the variant coding (Refer to GROUP 00 - Precautions Before Service - How to Perform Variant Coding ).
Check end