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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-381 STEP 15. Replace the right bank injector. Diagnostic Function − OBD-II Drive Cycle − Procedure 2 − Fuel Trim Monitor (3) Read in the diagnostic trouble code (DTC). YES : Replace the PCM. Then go to Step 16. STEP 16. Test the OBD-II drive cycle. Diagnostic Function − OBD-II Drive Cycle − Procedure 2 − Fuel Trim Monitor (2) Check the diagnostic trouble code (DTC). YES : Repeat the troubleshooting. DTC P0172: System too Rich (bank 1) . Fuel Trim Circuit • Refer to DTC P0201 − P0206, Injector Cir- cuit. . CIRCUIT OPERATION • Refer to DTC P0201 − P0206, Injector Cir- cuit. . TECHNICAL DESCRIPTION • If a malfunction occurs in the fuel system, the fuel trim value becomes too small. • The PCM checks whether the fuel trim value is within a specified range. . DESCRIPTIONS OF MONITOR METHODS and air/fuel feedback integral value (short time . MONITOR EXECUTION . MONITOR EXECUTION CONDITIONS (Other Other Monitor (There is no temporary DTC stored in memory for the item monitored below) • Misfire monitor Sensor (The sensor below is determined to be normal) • Volume airflow sensor • Engine coolant temperature sensor • Intake air temperature sensor • Barometric pressure sensor • Throttle position sensor . AK200015 1 2 AB CONNECTORS: A-73, A-74, A-75 A-73(GR) A-74(GR) A-75(GR) HARNESS CONNECTOR: |