[13B] MULTIPORT FUEL INJECTION (MPI) <4G64> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 18: Odor, White Smoke, Black Smoke and High-Concentration CO/HC during Idling | PRINT PAGE / INDEX / PRIOR / NEXT

Inspection Procedure 18: Odor, White Smoke, Black Smoke and High-Concentration CO/HC during Idling
COMMENT ON TROUBLE SYMPTOM Failure is possibly caused by improper air-fuel ratio, deteriorated catalyst, failed ignition system, failed fuel system, failed compression pressure or other faults.
PROBABLE CAUSE Failed air-fuel control system Failed ignition system Failed fuel system Failed intake and exhaust system Failed emission control system Failed compression pressure Failed catalytic converter <Vehicle with catalytic converter> 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. Check injector for operating sound. Check injector for operating sound (Refer to ). Q: Can operating sound be heard? YES: Go to Step 3 . NO: Check the injector system of the defective cylinder (Refer to Code No. 41 ).
| STEP 3. Check ignition timing. Check ignition timing (Refer to GROUP 11A - On-vehicle Service ). Q: Is the check result normal? YES: Go to Step 4 . NO: Check for offset ignition timing (Refer to Inspection Procedure 16 ).
| STEP 4. MUT-II/III Data List Refer to Data list reference table . Item 12: Air flow sensor Item 13: Intake air temperature sensor Item 21: Engine coolant temperature sensor Item 25: Barometric pressure sensor Q: Are the check results normal? YES: Go to Step 5 . NO: Perform the diagnosis code classified check procedure for the sensor that has shown an abnormal data value (Refer to Inspection Chart for Diagnosis Codes ).
| STEP 5. Check air intake from intake hose and intake manifold. Q: Is the check result normal? YES: Go to Step 6 . NO: Repair.
| STEP 6. Check for emission leakage from exhaust manifold. Q: Is the check result normal? YES: Go to Step 7 . NO: Repair.
| STEP 7. Check throttle body (throttle valve portion) for contamination. Q: Is the check result normal? YES: Go to Step 8 . NO: Clean throttle body (throttle valve portion) (Refer to ).
| STEP 8. MUT-II/III Data List Refer to Data list reference table . Item 17: Mixture adjusting screw (variable resistor) Q: Is the check result normal? YES: Go to Step 9 . NO: Check mixture adjusting screw (variable resistor) (Refer to Inspection Procedure 37 ).
| STEP 9. Check EGR control solenoid valve itself. Check EGR control solenoid valve itself [Refer to GROUP 17 - Emission Control System - Exhaust Gas Recirculation (EGR) System ]. Q: Is the check result normal? YES: Go to Step 10 . NO: Replace EGR control solenoid valve.
| STEP 10. Check EGR valve itself. Check EGR valve itself [Refer to GROUP 17 - Emission Control System - Exhaust Gas Recirculation (EGR) System ]. Q: Is the check result normal? YES: Go to Step 11 . NO: Replace EGR valve.
| STEP 11. Measure fuel pressure. Measure fuel pressure (Refer to ). Q: Is the check result normal? YES: Go to Step 12 . NO: Repair.
| STEP 12. Check positive crankcase ventilation valve itself. Check positive crankcase ventilation valve itself (Refer to GROUP 17 - Emission Control System - Crankcase Emission Control System ). Q: Is the check result normal? YES: Go to Step 13 . NO: Replace positive crankcase ventilation valve.
| STEP 13. Check spark plug. Q: Is the check result normal? YES: Go to Step 14 . NO: Replace spark plug.
| STEP 14. Check spark plug cable itself. Check spark plug cable itself (Refer to GROUP 16 - Ignition System - On-vehicle Service ). Q: Is the check result normal? YES: Go to Step 15 . NO: Replace spark plug cable.
| STEP 15. Check ignition coil itself. Check ignition coil itself (Refer to GROUP 16 - Ignition System - On-vehicle Service ). Q: Is the check result normal? YES: Go to Step 16 . NO: Replace ignition coil.
| STEP 16. Check compression pressure. Check compression pressure (Refer to GROUP 11A - On-vehicle Service ). Q: Is the check result normal? YES: Go to Step 17 . NO: Repair.
| STEP 17. Check injector for spraying condition. Check each injector for spray condition (Refer to ). Q: Does trouble symptom persist? YES: Replace engine-A/T-ECU. NO: Replace injector.

[13B] MULTIPORT FUEL INJECTION (MPI) <4G64> - - TROUBLESHOOTING - SYMPTOM PROCEDURES - Inspection Procedure 18: Odor, White Smoke, Black Smoke and High-Concentration CO/HC during Idling | PRINT PAGE / INDEX / PRIOR / NEXT

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