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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-215 STEP 14. Test the OBD-II drive cycle. Procedure 2 − Fuel Trim Monitor ( (2) Check the diagnostic trouble code (DTC). Q: Is the DTC P0174 is output? YES : Retry the troubleshooting. DTC P0175: System too Rich (bank 2) System too Rich (bank 2) Circuit • Refer to, DTC P0202, P0204, P0206 − Injector Circuit ( CIRCUIT OPERATION • Refer to, DTC P0202, P0204, P0206 − Injector Circuit ( TECHNICAL DESCRIPTION • If a malfunction occurs in the fuel system, the fuel • The ECM <M/T> or PCM <A/T> checks whether DTC SET CONDITIONS Check Area • Engine coolant temperature is lower than ° C (212 ° F) when the engine is started. • Intake air temperature is lower than 60 ° C (140 °
F) when the engine is started. • Under the closed loop air/fuel ratio control. • Intake air temperature is higher than -10 ° C (14 ° F). • Barometric pressure is higher than 76kPa (11 • Volume air flow sensor output frequency is 75 Hz Judgment Criteria • Long-term fuel trim has continued to be lower or • Short-term fuel trim has continued to be lower Check Area • Engine coolant temperature is lower than ° C (212 ° F) when the engine is started. • Intake air temperature is lower than 60 ° C (140 °
F) when the engine is started. • Under the closed loop air/fuel ratio control. • Intake air temperature is higher than -10 ° C (14 ° F). • Barometric pressure is higher than 76kPa (11 • Volume air flow sensor output frequency is 75 Hz Judgment Criteria • Long-term fuel trim has continued to be lower or • Short-term fuel trim has continued to be lower Check Area • Engine coolant temperature is higher than ° C (212 ° F) when the engine is started. • Intake air temperature is higher than 60 ° C (140 °
F) when the engine is started. • Under the closed loop air/fuel ratio control. • Intake air temperature is higher than -10 ° C (14 ° F). • Barometric pressure is higher than 76kPa (11 • Volume air flow sensor output frequency is 75 Hz Judgment Criteria • Long-term fuel trim has continued to be lower or • Short-term fuel trim has continued to be lower Check Area • Engine coolant temperature is higher than ° C (212 ° F) when the engine is started. • Intake air temperature is higher than 60 ° C (140 °
F) when the engine is started. • Under the closed loop air/fuel ratio control. |