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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-421 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-II DRIVE CYCLE PATTERN − OBD-II Drive Cycle − Procedure 6 − Other Monitor . . TROUBLESHOOTING HINTS (The most likely • Fuel tank temperature sensor failed. • Open fuel tank temperature sensor circuit, har- ness damage or connector damage. • PCM failed. NOTE: A diagnostic trouble code (DTC) could be . • The engine and the radiator have been flushed 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 |