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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L> 13B-499 DTC SET CONDITIONS Logic Flow Chart . Check Conditions • 2 seconds or more have passed since the start- ing sequence was completed. Judgement Criteria • Sensor output voltage has continued to be 4.6 volts or higher for 2 seconds. . OBD-ll DRIVE CYCLE PATTERN − OBD-ll Drive Cycle − Procedure 6 . . TROUBLESHOOTING HINTS (The most likely • Fuel tank temperature sensor failed. • Open or shorted fuel tank temperature sensor cir- cuit harness damage, or connector damage. • ECM failed. <M/T> • PCM failed. <A/T> DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (MUT-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991911: Main Harness B START MONITORING CONDITIONS END NO NO NO YES YES YES MALFUNCTION GOOD OUTPUT VOLTAGE < 0.1V CONTINUOUS FAILURE FOR 2secs OUTPUT VOLTAGE > 4.6V NO YES AK301445 |