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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-218 . CIRCUIT OPERATION • A voltage corresponding to the oxygen concen- tration in the exhaust gas is sent to the PCM (ter- • Terminal No. 2 of the cylinder 1, 4 heated oxygen sensor (front) is grounded with PCM (terminal . TECHNICAL DESCRIPTION • The cylinder 1, 4 heated oxygen sensor (front) detects the concentration of oxygen in the • When the cylinder 1, 4 heated oxygen sensor (front) begins to deteriorate, the heated oxygen • The PCM forcibly varies the air/fuel mixture to make it leaner and richer, and checks the . DESCRIPTIONS OF MONITOR METHODS Cylinder 1, 4 heated oxygen sensor (front) output voltage is over specified range. . MONITOR EXECUTION Continuous . MONITOR EXECUTION CONDITIONS Other Monitor (There is no temporary DTC stored in memory for the item monitored below) • Heated oxygen sensor heater (front) 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 . AK303820AB CONNECTOR: B-37 CYLINDER 1, 4 B-37 (GR) AK303013 CONNECTORS: B-21, B-22 PCM AB AIR CLEANER B-22 (B) B-21 (B) |