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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-135 CIRCUIT OPERATION • A voltage corresponding to the oxygen • Terminal 2 of the right bank heated oxygen TECHNICAL DESCRIPTION • The output signal of the right bank heated oxygen • The ECM <M/T> or PCM <A/T> checks for an DTC SET CONDITIONS Check Conditions • Right bank heated oxygen sensor (rear) signal • Engine coolant temperature is higher than 82 ° C (180 ° F). • Engine speed is higher than 1,200 r/min. • Volumetric efficiency is higher than 25 percent. • Monitoring time: 7 seconds. Judgment Criteria • Input voltage supplied to the ECM <M/T> or PCM • Only one monitor during one drive cycle Check Conditions • Right bank heated oxygen sensor (rear) signal • Engine coolant temperature is higher than 82 ° C (180 ° F). • Engine speed is higher than 1,200 r/min. • Volumetric efficiency is higher than 25 percent. • Volume air flow sensor output frequency is 75 Hz • At least twenty seconds have passed since fuel • The right bank heated oxygen sensor (front) • Monitoring time: 10 seconds Judgement Criteria • Making the air/fuel ratio 15 percent for 10 • Only one monitor during one drive cycle TROUBLESHOOTING HINTS (The most likely • Right bank heated oxygen sensor (rear) failed. • Open circuit in right bank heated oxygen sensor • Open circuit in right bank heated oxygen sensor • ECM failed. <M/T> • PCM failed. <A/T> DIAGNOSIS Required Special Tools ACX02493AC CONNECTOR : B-28 RIGHT BANK AK000225 CONNECTORS : C-58, C-62<M/T>, C-55 C-58 PCM<A/T> ECM<M/T> AK C-59 C-62 |