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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-199 STEP 17. Check the camshaft position sensor vane. Q: Is the vane in a good condition? YES : Replace the camshaft position sensor. Then go to Step 18. NO : Repair it. Then go to Step 18. STEP 18. Test the OBD-II drive cycle. Procedure 6 − Other Monitor ( ). (2) Check the diagnostic trouble code (DTC). Q: Is the DTC P0340 is output? YES : Retry the troubleshooting. DTC P0401: Exhaust Gas Recirculation Flow Insufficient Detected TECHNICAL DESCRIPTION • When the EGR solenoid switches from "OFF" to • The ECM <M/T> or PCM <A/T> checks how the DTC SET CONDITIONS Check Conditions • At least twenty seconds have passed since the • Engine coolant temperature is higher than 82 ° C (180 ° F). • Engine speed is at between 1,000 and 2,000 <M/ • Intake air temperature is higher than 5 ° C (41 ° F). • Barometric pressure is higher than 76 kPa (11 • Vehicle speed is 5 km/h (3.1 mph) <M/T> or 30 • At least ninety seconds have passed since • The throttle valve is closed. • Volumetric efficiency is lower than 15 <M/T> or • While fuel is being shut off. <M/T> • Monitoring time: 2 seconds. Judgement Criteria • The intake manifold pressure fluctuations are • Three monitors during one drive cycle TROUBLESHOOTING HINTS (The most likely • EGR valve does not open. • EGR control vacuum is too low. • EGR solenoid failed. • Open or shorted EGR solenoid circuit, or loose • Manifold differential pressure sensor failed. • ECM failed. <M/T> • PCM failed. <A/T> DIAGNOSIS Required Special Tools STEP 1. Check the EGR system − Exhaust Gas Recirculation (EGR) System - EGR System Check ( ). Q: Are there any abnormalities? |