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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-683 . CIRCUIT OPERATION The linear air-fuel ratio sensor and the ECM are con- • The line between the linear air-fuel ratio sensor (terminal No. 1) and the ECM (terminal No. 56) • The auxiliary line between the linear air-fuel ratio sensor (terminal No. 4) and the ECM (terminal • The line between the linear air-fuel ratio sensor (terminal No. 5) and the ECM (terminal No. 39) is . TECHNICAL DESCRIPTION • The ECM effects air/fuel ratio feedback control in accordance with the signals from the linear • If the linear air-fuel ratio sensor has deteriorated, corrections will be made by the heated oxygen . DESCRIPTIONS OF MONITOR METHODS • The linear air-fuel ratio sensor heater or the exhaust gas heats the linear air-fuel ratio sensor . MONITOR EXECUTION Continuous . MONITOR EXECUTION CONDITIONS Other Monitor (There is no temporary DTC stored in memory for the item monitored below) • Linear air-fuel ratio sensor heater monitor • Misfire monitor • Fuel system monitor Sensor (The sensor below is determined to be normal) • Mass airflow sensor • Engine coolant temperature sensor • Intake air temperature sensor • Barometric pressure sensor • Throttle position sensor • Accelerator pedal position sensor . |