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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-245 CIRCUIT OPERATION • A voltage corresponding to the oxygen concen- tration in the exhaust gas is sent to the ECM (ter- • Terminal No. 2 of the right bank heated oxygen sensor (rear) is grounded with ECM (terminal No. • The ECM applies an off set voltage of 0.5 volt to terminal No. 2 of the right bank heated oxygen . TECHNICAL DESCRIPTION • The output signal of the right bank heated oxygen sensor (front) is compensated by the output sig- • The ECM checks for the right bank heated oxy- gen sensor (rear) output voltage. . DESCRIPTIONS OF MONITOR METHODS Right bank heated oxygen sensor (rear) output volt- age is under the 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 (front) heater monitor • Heated oxygen sensor (rear) heater monitor • Heated oxygen sensor (front) monitor • Heated oxygen sensor (front) inactive monitor • Heated oxygen sensor offset voltage monitor • Air/fuel ratio feedback monitor Sensor (The sensor below is determined to be normal) • Mass airflow sensor • Engine coolant temperature sensor • Intake air temperature sensor • Barometric pressure sensor . |