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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-141 DTC SET CONDITIONS Logic Flow Chart . Check Conditions • 3 seconds or more have passed since the ignition switch was turned to "ON" position. Judgement Criterion • Mass airflow sensor output voltage has continued to be 0.2 volt or lower for 2 seconds. . OBD-II DRIVE CYCLE PATTERN Refer to Diagnostic Function − OBD-II Drive Cycle − Pattern 22 . TROUBLESHOOTING HINTS (The most • Mass airflow 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 End Malfunction Yes Yes Yes No No No Continuous failure for 2secs Output voltage < 0.2V Output voltage > 4.9V Monitoring Good Start AK700459 Yes No |