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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-169 Judgement Criterion • Changes in the intake air temperature is lower than 1 °C (1.8°F). . OBD-II DRIVE CYCLE PATTERN Refer to Diagnostic Function − OBD-II Drive Cycle − Pattern 8 . . TROUBLESHOOTING HINTS (The most • Intake air temperature sensor failed. • 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. (5) Heating the sensor using a hair drier. • The indicated temperature increases. NOTE: Do not allow it to increase over 80 ° C (176 ° F). (6) 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. AK700568AB MB991824 MB991827 MB991910 Data link |