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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-27 CIRCUIT OPERATION • The volume air flow sensor power is supplied • 5-volt power is applied to the volume air flow TECHNICAL DESCRIPTION • While the engine is running, the volume air flow • The ECM <M/T> or PCM <A/T> checks whether DTC SET CONDITIONS Check Conditions • Engine speed is higher than 500 r/min. Judgement Criteria • Volume air flow sensor output frequency has TROUBLESHOOTING HINTS (The most likely • Volume air flow sensor failed. • Open or shorted volume air flow sensor circuit, or • ECM failed. <M/T> • PCM failed. <A/T> • Air leak between volume air flow sensor and DIAGNOSIS Required Special Tools ACX02480 CONNECTOR : B-14 AC VOLUME AIR AK000226 AK000226AB CONNECTOR : A-21X MFI RELAY AK000280 C-49, C-54 C-60 ECM<M/T> CONNECTORS:C-49,C-60<M/T>, BA |