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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-621 TECHNICAL DESCRIPTION • The PCM monitors the Evaporative Emission (EVAP) System pressure. • The PCM controls the evaporative emission ven- tilation solenoid. It closes the evaporative emis- • The evaporative emission purge solenoid is opened to allow manifold vacuum to create low • When the EVAP system develops a vacuum of 2 kPa (0.29 psi), the evaporative emission purge • The PCM determines whether there is a leak in the EVAP system by monitoring the vacuum • The test is stopped when fuel vapor pressure exceeds predetermined limits. . DESCRIPTIONS OF MONITOR METHODS • Measure reverting pressure after depressurizing by intake manifold negative pressure and detect . MONITOR EXECUTION • Once per driving cycle. . MONITOR EXECUTION CONDITIONS (Other Other Monitor (There is no temporary DTC stored in memory for the item monitored below) • Evaporative emission purge solenoid monitor • Evaporative emission purge system monitor • Fuel tank differential pressure sensor monitor • Evaporative emission ventilation solenoid monitor • Fuel level sensor monitor • Fuel temperature sensor monitor Sensor (The sensors below are determined to be normal) • Volume airflow sensor • Barometric pressure sensor • Intake air temperature sensor • Engine coolant temperature sensor . |