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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-163 . Check Conditions • Engine coolant temperature is higher than 76°C (169 °F). • Repeat 2 or more times: drive *1 , stop *2 . Drive *1 : vehicle speed higher than 50 km/h (31 mph) lasting a total of more than 60 seconds. Stop *2 : vehicle speed lower than 1.5 km/h (1.0 mph) lasting more than 30 seconds. 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. • Intake air temperature sensor circuit harness damage, or connector 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 |