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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-525 DTC SET CONDITIONS Logic Flow Chart . Check Conditions • Battery positive voltage is at between 10 and 16.5 volts. Judgment Criteria • The evaporative emission purge solenoid coil surge voltage (battery positive voltage + 2 volts) • The PCM monitors for this condition once during the drive cycle. Check Conditions • Battery positive voltage is at between 10 and 16.5 volts. • ON duty cycle of the evaporative emission purge solenoid is between 10 and 90 percent. • Evaporative emission ventilation solenoid is OFF. • More than 1 second has elapsed after the above mentioned conditions have been met. Judgment Criteria • The evaporative emission purge solenoid coil surge voltage (battery positive voltage + 2 volts) . OBD-II DRIVE CYCLE PATTERN − OBD-II Drive Cycle − Procedure 6 . . TROUBLESHOOTING HINTS (The most likely • Evaporative emission purge solenoid failed. • Open or shorted evaporative emission purge solenoid circuit, harness damage or connector • PCM failed. MONITORING CONDITIONS NO NO YES YES GOOD MALFUNCTION WAS SURGE VOLTAGE (> V B +2V) DETECTED? START END AK301449 |