Inspection Procedure 16: Odor, White Smoke, Black Smoke and High-Concentration CO/HC during Idling


COMMENTS ON TROUBLE SYMPTOM



  • Failure is possibly caused by improper air-fuel ratio, deteriorated catalyst, and failed ignition system or fuel system, or improper compression pressure, and so on.

PROBABLE CAUSES



  • Failed air-fuel ratio control system
  • Failed ignition system
  • Failed fuel system
  • Failed intake and exhaust air system
  • Failed exhaust gas cleaning system <Except vehicles for Russia>
  • Improper compression pressure
  • Deteriorated catalyst
  • Failed engine-ECU

DIAGNOSIS PROCEDURE

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

Q. Is 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. Is operating sound audible?
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 ).
    (Refer to Code No. P0204: No. 4 Injector System ).
    (Refer to Code No. P0205: No. 5 Injector System ).
    (Refer to Code No. P0206: No. 6 Injector System ).

STEP 3. Check ignition timing.

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

Q. Is the check result normal?
Go to Step 4 .
Check ignition timing deviation (Refer to Inspection Procedure 14 ).

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

  • Refer to Data List Reference Table .

  1. Item 05: Intake air temperature sensor
  2. Item 06: Engine coolant temperature sensor
  3. Item 08: Manifold absolute pressure sensor
  4. Item 10: Air flow sensor
  5. Item BB: Barometric pressure 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 air intake from intake hose and inlet manifold.

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

STEP 6. Check exhaust leak from exhaust manifold.

Q. Is the check result normal?
Go to Step 7 .
Repair.

STEP 7. Check throttle body (throttle valve portion) contamination.

Q. Is the check result normal?
Go to Step 8 .
Clean throttle body (throttle valve portion) (Refer to ).

STEP 8. M.U.T.-III data list

  • Refer to Data List Reference Table .

  1. Item AC: Right bank oxygen sensor (front)
  2. Item AD: Right bank oxygen sensor (rear)
  3. Item AE: Left bank oxygen sensor (front)
  4. Item AF: Left bank oxygen sensor (rear)

Q. Are the check results normal?
Go to Step 9 .
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 9. Check purge control solenoid valve itself.

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

Q. Is the check result normal?
YES : Go to Step 10 <Except vehicles for Russia> .
YES : Go to Step 11 <Vehicles for Russia> .
Replace the purge control solenoid valve.

STEP 10. Check exhaust gas recirculation valve itself.

  • Check exhaust gas recirculation valve itself (Refer to GROUP 17 - Emission Control - Exhaust Gas Recirculation Valve - Exhaust Gas Recirculation Valve (Stepper Motor) Check ).

Q. Is the check result normal?
Go to Step 11 .
Replace the exhaust gas recirculation valve.

STEP 11. Fuel pressure measurement.

  • Fuel pressure measurement. (Refer to ).

Q. Is the check result normal?
Go to Step 12 .
Repair.

STEP 12. Check positive crankcase ventilation valve itself.

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

Q. Is the check result normal?
Go to Step 13 .
Replace the positive crankcase ventilation valve.

STEP 13. Visual check of ignition spark.

  • Remove the spark plug and install it to the ignition coil.
  • Connect the ignition coil connector.
  • Remove all injector connector.
  • At the engine start, check each spark plug produces a spark.

Q. Is the check result normal?
Go to Step 15 .
Go to Step 14 .

STEP 14. Check spark plug.

  • Check spark plug itself (Refer to GROUP 16 - Ignition System - On-vehicle Service - Spark Plug Check and Cleaning ).

Q. Is the check result normal?
Check ignition circuit system (Refer to Inspection Procedure 22 ).
Replace the spark plug.

STEP 15. Check compression pressure.

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

Q. Is the check result normal?
Go to Step 16 .
Repair.

STEP 16. Check injector for spray condition.

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

Q. Is the check result normal?
Go to Step 17 .
Replace the injector.

STEP 17. Replace the catalytic converter.

  • After replacing catalytic converter check the trouble symptom again.

Q. Does the trouble symptom persist?
Replace the engine-ECU.
Check end.