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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-194 DTC SET CONDITIONS . 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. • Monitoring time: 7 seconds. START V F > =4.5V 2secs HAS PASSED YES YES YES NO NO NO MALFUNCTION MONITORING CONDITIONS YES NO MONITORING CONDITIONS +5V ON AK401409 V F < 0.2V 8secs HAS PASSED YES YES NO NO END MALFUNCTION GOOD MODULATE A/F CONDITION TO RICH |