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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-346 DTC SET CONDITIONS . Check Conditions • 60 seconds have elapsed from the start of the previous monitoring. • Engine coolant temperature is higher than 20°C (68 °F). • While the cylinder 2, 3 heated oxygen sensor (front) heater is on. • Battery positive voltage is between 11 and 16.5 volts. Judgment Criteria • The cylinder 2, 3 heated oxygen sensor (front) heater current has continued to be lower than . OBD-II DRIVE CYCLE PATTERN Refer to Diagnostic Function − OBD-II Drive Cycle − Procedure 6 . . TROUBLESHOOTING HINTS (The most • Open or shorted cylinder 2, 3 heated oxygen sen- sor (front) heater circuit, or harness damage. • Open circuit in cylinder 2, 3 heated oxygen sen- sor (front) heater. • Connector damage. • PCM failed. START END YES YES YES YES NO NO NO NO MALFUNCTION GOOD CONTINUOUS FAILURE FOR 4secs MONITORING CONDITIONS CURRENT < 0.16A CURRENT > 7.5A AK302023 |