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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-785 STEP 2. Using scan tool MB991958, read the diagnostic CAUTION To prevent damage to scan tool MB991958, always turn the YES : Refer to Diagnostic Trouble Code Chart . NO : Go to Step 3. STEP 3. Using scan tool MB991958, check actuator test. Actuator Test Reference Table . a. Item 10: Evaporative Emission Purge Solenoid. (3) Turn the ignition switch to the "LOCK" (OFF) position. YES : Go to Step 4. symptom is eliminated. STEP 4. Check the spark plugs. − On-vehicle Service − Spark Plug Check And Cleaning . Q: Are there any abnormalities? YES : Replace the spark plug. Then confirm that the malfunction symptom is eliminated. NO : Go to Step 5. STEP 5. Check the ignition coil. − On-vehicle Service − Ignition Coil Check . Q: Are there any abnormalities? YES : Replace the ignition coil. Then confirm that the malfunction symptom is eliminated. NO : Go to Step 6. AK700568AB MB991824 MB991827 MB991910 Data link |