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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-421 DTC SET CONDITIONS Logic Flow Chart . Check Conditions • Engine speed is between 438 and 6,500 r/min. • Engine coolant temperature is higher than −10°C (14 °F). Calculate crankshaft angular acceleration (An) Misfire Calculate percent misfire (R MF ) End No No No No No No Yes Good Within 1000rev Malfunction (exceed std × 1.5) Good Malfunction (catalytic converter is damaged.) Good Calculate percent misfire (R MF ) Within 200rev Ne MF : Threshold value for misfire TH CD : Threshold value for catalyst damage AK800585 Start Yes Yes Yes Yes Yes Monitoring An < TH MF (Ne, Ec) R MF
>= specified value R MF >= TH CD (Ne, Ec) : Engine speed |