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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-99 . CIRCUIT OPERATION • Power is supplied from the MFI relay (terminal No. 2) to the heated oxygen sensor (rear) heater. • The ECM (terminal No. 35) controls continuity to the heated oxygen sensor (rear) heater by turn- . TECHNICAL DESCRIPTION • The ECM checks whether the heater current is within a specified range when the heater is ener- • The ECM checks whether the heater voltage is within a specified range when the heater is not . DESCRIPTIONS OF MONITOR METHODS Heated oxygen sensor (rear) heater current or volt- age 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 . AK704087AB Connector: A-13 A-13 AK704088 MFI relay AB Connector: A-33X A-33X AK704090AB Connector: B-10 B-10 (GR) AK900595 Connector: C-129 C-129 AB AK900665 D-37 (B) Rear heater duct (RH) Heated oxygen AB Connector: D-37 |