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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L> 13B-319 . CIRCUIT OPERATION • Power is supplied from the MFI relay (terminal No. 4) to the right bank heated oxygen sensor • The ECM (terminal No. 27) <M/T> or PCM (termi- nal No. 27) <A/T> controls continuity to the right . BACKGROUND • The ECM <M/T> or PCM <A/T> checks whether the heater current is within a specified range . DESCRIPTIONS OF MONITOR METHODS rent is out of specified range when engine coolant °C (68°F). . MONITOR EXECUTION . MONITOR EXECUTION CONDITIONS (Other 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 . AK300075 RIGHT BANK CONNECTOR: B-28 AB B-28 (GR) AK300121 MFI RELAY CONNECTOR: A-18X AB A-18X AK300091 CONNECTOR: C-51 <M/T> ECM AF C-51 (GR) AK300244 CONNECTOR: C-52 <A/T> AC PCM C-52 (GR) |