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MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L> 13B-145 CIRCUIT OPERATION • Power is supplied from the MFI relay (terminal 1) • The PCM (terminal 27) controls continuity to the BACKGROUND • The PCM checks whether the heater current is DTC SET CONDITIONS Check Conditions • Engine coolant temperature is higher than 20 ° C (68 ° F). • While the right bank heated oxygen sensor (rear) • Battery positive voltage is at between 11 and 16 Judgment Criteria • Heater current of the right bank heated oxygen • Only one monitor during one drive cycle TROUBLESHOOTING HINTS (The most likely • Open or shorted right bank heated oxygen • Open circuit in right bank heated oxygen sensor • PCM failed. DIAGNOSIS Required Special Tools ACX02493AG CONNECTOR:B-31 RIGHT BANK AK000555AB CONNECTOR : A-21X MFI RELAY AK000280 CONNECTOR : C-39 PCM AW |