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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-119 TECHNICAL DESCRIPTION • The heated oxygen sensor (front) detects the • When the heated oxygen sensor (front) begins to • The ECM <M/T> or PCM <A/T> forcibly varies DTC SET CONDITIONS Check Conditions • Engine coolant temperature is higher than 50 ° C (176 ° F). • Engine speed is at between 1,200 and 3,000 r/ • Volumetric efficiency is at between 25 and 60 • Intake air temperature is higher than -10 ° C (14 ° F). • Barometric pressure is higher than 76 kPa (11 • Under the closed loop air/fuel control. • ECM <M/T> or PCM <A/T> dose not judge to be Judgment Criteria • The heated oxygen sensor (front) sends "lean" • Only one monitor during one drive cycle NOTE: If the sensor switch time is longer than the − H02S Test Results, it is assumed that the heated oxygen sensor has deteriorated. If it is TROUBLESHOOTING HINTS (The most likely • Heated oxygen sensor (front) deteriorated. • Open circuit in heated oxygen sensor (front) • Open circuit in heated oxygen sensor (front) • ECM failed. <M/T> • PCM failed. <A/T> DIAGNOSIS Required Special Tools |