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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-103 CIRCUIT OPERATION • A 5-volt power supply is applied on the TPS • When the throttle valve shaft is turned from the TECHNICAL DESCRIPTION • The TPS outputs voltage which corresponds to • The ECM <M/T> or PCM <A/T> checks whether DTC SET CONDITIONS Check Conditions • Two seconds or more have passed since the • Engine speed is lower than 3,000 r/min. • Volumetric efficiency is lower than 30 percent. Judgement Criteria • TPS output voltage has continued to be 4.6 volts TROUBLESHOOTING HINTS (The most likely • TPS failed or maladjusted. • Open or shorted TPS circuit, or loose connector. • ECM failed. <M/T> • PCM failed. <A/T> DIAGNOSIS Required Special Tools ACX02484 AC CONNECTOR : B-07 THROTTLE AK000225 CONNECTORS : C-58, C-62<M/T>, C-55 C-58 PCM<A/T> ECM<M/T> AK C-59 C-62 |