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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-209 DTC SET CONDITIONS Logic Flow Chart . Check Conditions • 3 minutes or more have passed since the engine starting sequence was completed. • Cylinder 1, 4 heated oxygen sensor (front) signal voltage has continued to be 0.2 volt or lower. • Engine coolant temperature is higher than 76°C (169 °F). • Engine speed is higher than 1,200 r/min. • Volumetric efficiency is higher than 25 percent. • Mass airflow sensor output is 6 g/sec or more. • At least 20 seconds have passed since fuel shut off control was canceled. • Monitoring time: 10 seconds. START V F > =4.5V 2secs HAVE PASSED YES YES YES NO NO NO MALFUNCTION MONITORING CONDITIONS YES NO MONITORING CONDITIONS +5V ON AK302019 V F < 0.2V 10secs HAVE PASSED YES YES NO NO END MALFUNCTION GOOD MODULATE A/F CONDITION TO RICH |