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MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L> 13A-33 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 PCM checks whether the frequency of this DTC SET CONDITIONS Check Conditions • Throttle position sensor voltage is 1.5 volts or • Engine speed is higher than 2,000 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 • PCM failed. • Air leak between volume air flow sensor and DIAGNOSIS Required Special Tools ACX02480 CONNECTOR : B-14 AC VOLUME AIR AK000280 CONNECTORS : C-39, C-40 C-39 C-40 PCM AU AK000555AB CONNECTOR : A-21X MFI RELAY |