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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE> 13B-121 DTC SET CONDITIONS Logic Flow Chart . Check Conditions • 2 seconds or more have passed since the engine starting sequence was completed. Judgement Criteria • 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 − OBD-II Drive Cycle − Procedure 6 . . TROUBLESHOOTING HINTS (The most likely • Intake air temperature sensor failed. • Open intake air temperature sensor circuit, or connector damage. • PCM failed. 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 AK302384 |