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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-173 OBD-II DRIVE CYCLE PATTERN Refer to Diagnostic Function − OBD-II Drive Cycle − Pattern 22 . TROUBLESHOOTING HINTS (The most • Intake air temperature sensor failed. • Connector damage • Harness damage • ECM failed. 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 data list item 5: CAUTION To prevent damage to scan tool MB991958, always turn the 5, Intake Air Temperature Sensor. • The intake air temperature and temperature shown with the scan tool should approximately match. (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 P.00-15 . NO : Go to Step 2. STEP 2. Check harness connector A-07 at the intake air YES : Go to Step 3. Inspection P.00E-2 . Then go to Step 5. AK700568AB MB991824 MB991827 MB991910 Data link |