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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-743 STEP 4. Using scan tool MB991958, check data list. . a. Item 5: Intake Air Temperature Sensor. c. Item 10: Mass Airflow Sensor d. Item 36: Intake V.V.T. phase angle f. Item 76: A/C Switch (3) Turn the ignition switch to the "LOCK" (OFF) position. YES : Go to Step 5. symptom is eliminated. STEP 5. Check the fuel pressure. . Q: Is the fuel pressure normal? YES : Go to Step 6. symptom is eliminated. STEP 6. Check the ignition timing. − Ignition Timing Check . Q: Is the ignition timing normal? YES : Go to Step 7. Then confirm that the malfunction symptom is STEP 7. Measure the voltage at ECM connector B-10 by harness special tool MB992110 between the separated (2) Start the engine and run at idle. NOTE: Vehicles for Canada, the headlight, taillight, etc. AK604040 ECM AB Body side harness MB992110 |