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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-81 . CIRCUIT OPERATION • Power is supplied from the MFI relay (terminal No. 2) to the right bank heated oxygen sensor • The ECM (terminal No. 49) controls continuity to the right bank heated oxygen sensor (rear) . TECHNICAL DESCRIPTION • The ECM checks whether the heater current is within a specified range when the heater is ener- . DESCRIPTIONS OF MONITOR METHODS Right bank heated oxygen sensor heater (rear) cur- rent is out of specified range. . MONITOR EXECUTION Continuous . MONITOR EXECUTION CONDITIONS Other Monitor (There is no temporary DTC stored in memory for the item monitored below) • Not applicable Sensor (The sensor below is determined to be normal) • Not applicable . AK700399AB MFI relay A-33X Connector: A-33X AK900130AD Right bank heated Front exhaust B-02 (B) Connector: B-02 AK700401AB ECM B-10 (GR) Connector: B-10 AK900602 Connector: A-13 A-13 AB |