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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-485 DTC SET CONDITIONS Logic Flow Chart . Check Conditions • Engine is being cranked. • Battery positive voltage is between 10 and 16.5 volts. . Judgement Criteria • The evaporative emission purge solenoid coil surge voltage (battery positive voltage + 2 volts) • The ECM monitors for this condition once during the drive cycle. Check Conditions • Battery positive voltage is 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. Judgement Criterion • The evaporative emission purge solenoid coil surge voltage (battery positive voltage + 2 volts) . OBD-II DRIVE CYCLE PATTERN Refer to Diagnostic Function − OBD-II Drive Cycle − Pattern 22 . TROUBLESHOOTING HINTS (The most • Evaporative emission purge solenoid failed. • Harness damage • Connector damage • ECM failed. End No No Was surge voltage (> VB + 2V) detected? Good AK604339 Malfunction Start Yes Yes Monitoring |