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MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L> 13B-213 CIRCUIT OPERATION • The injector power is supplied from the MFI relay • The PCM controls the injector by turning the TECHNICAL DESCRIPTION • The amount of fuel injected by the injector is • A surge voltage is generated when the injectors • The PCM checks this surge voltage. DTC SET CONDITIONS Check Area • Engine speed is lower than 1,000 r/min. • Throttle position sensor output voltage is lower Judgment Criteria • Injector coil surge voltage (battery positive TROUBLESHOOTING HINTS (The most likely • Injector failed. • Open or shorted injector circuit, or loose • PCM failed. DIAGNOSIS Required Special Tools AK000618AC CONNECTORS:B-19,B-22,B-25 B-25 B-19 B-22 AK000618 AB CONNECTOR:B-26 AK000555AB CONNECTOR : A-21X MFI RELAY AK000280 CONNECTOR : C-39 PCM AW |