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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-238 . CIRCUIT OPERATION • Power is supplied from the MFI relay (terminal No. 4) to the cylinder 1, 4 heated oxygen sensor • The PCM (terminal No. 126) controls continuity to the cylinder 1, 4 heated oxygen sensor (front) . TECHNICAL DESCRIPTION • The PCM checks whether the heater current is within a specified range when the heater is ener- . DESCRIPTIONS OF MONITOR METHODS Cylinder 1, 4 heated oxygen sensor heater (front) current is out of specified range when engine °C (68°F). . 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) • Engine coolant temperature sensor . AK303059 CONNECTOR: B-23 PCM AB AIR CLEANER B-23 AK303820AB CONNECTOR: B-37 CYLINDER 1, 4 B-37 (GR) |