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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-177 DTC SET CONDITIONS Logic Flow Chart . Check Conditions • 2 seconds or more have passed since the engine starting sequence was completed. Judgement Criterion • Intake air temperature sensor output voltage has continued to be 4.6 volts or higher [corresponding −40°C (−40°F) or lower] for 2 seconds. . 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 Start Output voltage < 0.2V End No No No Yes Yes Yes Malfunction Good Continuous failure for 2secs Output voltage > 4.6V Monitoring conditions No Yes AK700464 |