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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-493 DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (M.U.T.-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991910: Main Harness A STEP 1. Using scan tool MB991958, check actuator test CAUTION To prevent damage to scan tool MB991958, always turn the 15, Evaporative emission ventilation solenoid. • An operation sound should be heard and vibration should be felt when the evaporative emission ventilation (4) Turn the ignition switch to the "LOCK" (OFF) position. YES : It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use − How to Cope with Intermittent Malfunctions . NO : Go to Step 2. STEP 2. Check harness connector A-33X at the MFI relay YES : Go to Step 3. . Then go to Step 7. AK700568AB MB991824 MB991827 MB991910 Data link |