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MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L> 13B-321 • Then the evaporative emission purge solenoid is • When the fuel system develops a vacuum of 2 • The PCM determines if there is leak or clog in the • The test is stopped when fuel vapor pressure is DTC SET CONDITIONS Test Conditions A: At Start up • Intake air temperature is 30 ° C (86 ° F) or less when the engine is started. • The engine coolant temperature is 30 ° C (86 ° F) or less when the engine is started. Test Conditions B: For Test to Run • With in 16 minutes after the engine is started. • Engine coolant temperature is higher than 60 ° C (140 ° F.) • Engine speed is 1,600 r/min or more. • Power steering pressure switch: "OFF." • Barometric pressure is above 76 kPa (11 psi.) • Volumetric efficiency is between 25 and 80 • Vehicle speed is 30 km/h (18.7 mph) or more. Test Conditions C: For Test to Stop • Intake air temperature is less than 5 ° C (41 ° F.) • When the evaporative emission purge solenoid • The pressure fluctuation width is less than 647 • Fuel tank differential pressure sensor output − 4 V. Judgment Criteria • The fluctuation of fuel tank internal pressure is NOTE: The monitoring time (75 − 125 seconds.) depends on the fuel level and the temperature in the TROUBLESHOOTING HINTS • Loose fuel cap. • Fuel cap relief pressure is incorrect. • Fuel overflow limiter valve failed. • Purge line or vapor line is clogged. • Fuel tank, purge line or vapor line seal failed. • Evaporative emission purge solenoid failed. • Evaporative emission ventilation solenoid failed. • Fuel tank differential pressure sensor failed. • Evaporative emission canister seal is faulty. • Evaporative emission canister is clogged. OVERVIEW OF TROUBLESHOOTING • To determine the cause of DTC P0455, a • Prior to doing the performance test, several DIAGNOSIS Required Special Tool: |