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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE> 13B-396 DTC SET CONDITIONS Logic Flow Chart . Check Conditions • Engine coolant temperature is higher than 76°C (169 °F). • The left bank heated oxygen sensor (front) is active. • The cumulative mass airflow sensor output is higher than 1,638 g. • Repeat 3 or more times: drive *1 , stop *2 . Drive *1 : • Engine speed is higher than 1,500 r/min. • Volumetric efficiency is higher than 40 per- cent. • Vehicle speed is higher than 30 km/h (19 mph). • A total of more than 10 seconds have elapsed with the above mentioned condi- Stop *2 : • Vehicle speed is lower than 1.5 km/h (1.0 mph). Judgement Criteria • Change in the output voltage of the left bank heated oxygen sensor (rear) is lower than 0.313 . END YES NO NO NO START MONITORING CONDITION YES MALFUNCTION GOOD OUTPUT VOLTAGE CHANGE < 0.313 V GO/STOP OPERATION FOR SPECIFIED TIMES YES AK302399 |