Select "A/F ALPHA-B1", "A/F ALPHA-B2" in "SPEC" of "DATA MONITOR" mode, and check that each indication is within the SP value.
NOTE:
Check "A/F ALPHA-B1", "A/F ALPHA-B2" for approximately 1 minute because they may fluctuate. It is NG if the indication is out of the SP value even a little.
Is the measurement value within the SP value?
YES >> GO TO 17.
NO-1 >> Less than the SP value: GO TO 2.
NO-2 >> More than the SP value: GO TO 3. 2.CHECK "B/FUEL SCHDL"
Select "B/FUEL SCHDL" in "SPEC" of "DATA MONITOR" mode, and check that the indication is within the SP value.
Is the measurement value within the SP value?
YES >> GO TO 4.
NO >> More than the SP value: GO TO 19. 3.CHECK "B/FUEL SCHDL"
Select "B/FUEL SCHDL" in "SPEC" of "DATA MONITOR" mode, and check that the indication is within the SP value.
Is the measurement value within the SP value?
YES >> GO TO 6.
NO-1 >> More than the SP value: GO TO 6.
NO-2 >> Less than the SP value: GO TO 25. 4.CHECK "A/F ALPHA-B1", "A/F ALPHA-B2"
Select "A/F ALPHA-B1", "A/F ALPHA-B2" in "SPEC" of "DATA MONITOR" mode, and check that each indication is within the SP value. Is the measurement value within the SP value?
YES >> GO TO 5.
NO >> GO TO 6. 5.CHANGE ENGINE OIL
Stop the engine.
Change engine oil.
NOTE:
This symptom may occur when a large amount of gasoline is mixed with engine oil because of driving conditions (such as when engine oil temperature does not rise enough since a journey distance is too short during winter). The symptom will not be detected after changing engine oil or changing driving conditions.
>> Inspection END 6.CHECK FUEL PRESSURE
Check fuel pressure. (Refer to See: Fuel Delivery and Air Induction\Fuel Pressure\Testing and Inspection.)
Is the Inspection result normal?
YES >> GO TO 9.
NO-1 >> Fuel pressure is too high: Replace "fuel filter and fuel pump assembly" and then. GO TO 8.
NO-2 >> Fuel pressure is too low: GO TO 7. 7.DETECT MALFUNCTIONING PART
Check fuel hoses and fuel tubes for clogging.
Is the Inspection result normal?
YES >> Replace "fuel filter and fuel pump assembly" and then GO TO 8.
NO >> Repair or replace malfunctioning part and then GO TO 8. 8.CHECK "A/F ALPHA-B1", "A/F ALPHA-B2"
Start engine.
Select "A/F ALPHA-B1", "A/F ALPHA-B2" in "SPEC" of "DATA MONITOR" mode, and check that each indication is within the SP value. Is the measurement value within the SP value?
YES >> Inspection END
NO >> GO TO 9. 9.PERFORM POWER BALANCE TEST
Perform "POWER BALANCE" in "ACTIVE TEST" mode.
Check that each cylinder produces a momentary engine speed drop. Is the Inspection result normal?
YES >> GO TO 12.
NO >> GO TO 10. 10.DETECT MALFUNCTIONING PART
Check the following below.
YES >> Replace fuel injector and then GO TO 11.
NO >> Repair or replace malfunctioning part and then GO TO 11. 11.CHECK "A/F ALPHA-B1", "A/F ALPHA-B2"
Start engine.
Select "A/F ALPHA-B1", "A/F ALPHA-B2" in "SPEC" of "DATA MONITOR" mode, and check that each indication is within the SP value. Is the measurement value within the SP value?
YES >> Inspection END
NO >> GO TO 12. 12.CHECK A/F SENSOR 1 FUNCTION
Perform all DTC CONFIRMATION PROCEDURE related with A/F sensor 1.
YES >> GO TO 15.
NO >> GO TO 13. 13.CHECK A/F SENSOR 1 CIRCUIT
Perform Diagnostic Procedure according to corresponding DTC.
>> GO TO 14. 14.CHECK "A/F ALPHA-B1", "A/F ALPHA-B2"
Start engine.
Select "A/F ALPHA-B1", "A/F ALPHA-B2" in "SPEC" of "DATA MONITOR" mode, and check that each indication is within the SP value. Is the measurement value within the SP value?
YES >> Inspection END
NO >> GO TO 15. 15.DISCONNECT AND RECONNECT ECM HARNESS CONNECTOR
Stop the engine.
Disconnect ECM harness connector. Check pin terminal and connector for damage, and then reconnect it. >> GO TO 16.
16.CHECK "A/F ALPHA-B1", "A/F ALPHA-B2"
Start engine.
Select "A/F ALPHA-B1", "A/F ALPHA-B2" in "SPEC" of "DATA MONITOR" mode, and check that each indication is within the SP value. Is the measurement value within the SP value?
YES >> Inspection END
NO >> Detect malfunctioning part according to See: Symptom Related Diagnostic Procedures. 17.CHECK "B/FUEL SCHDL"
Select "B/FUEL SCHDL" in "SPEC" of "DATA MONITOR" mode, and check that the indication is within the SP value.
Is the measurement value within the SP value?
YES >> Inspection END
NO-1 >> More than the SP value: GO TO 18.
NO-2 >> Less than the SP value: GO TO 25. 18.DETECT MALFUNCTIONING PART
Check for the cause of large engine friction. Refer to the following.
Engine oil level is too high
Engine oil viscosity
Belt tension of power steering, alternator, A/C compressor, etc. is excessive
Noise from engine
Noise from transmission, etc.
Check for the cause of insufficient combustion. Refer to the following.
Camshaft sprocket installation malfunction, etc. >> Repair or replace malfunctioning part, and then GO TO 30.
19.CHECK INTAKE SYSTEM
Check for the cause of uneven air flow via the mass air flow sensor. Refer to the following.
Crushed air ducts
Malfunctioning seal of air cleaner element
Uneven dirt of air cleaner element
Improper specification of intake air system Is the Inspection result normal?
YES >> GO TO 21.
NO >> Repair or replace malfunctioning part, and then GO TO 20. 20.CHECK "A/F ALPHA-B1", "A/F ALPHA-B2", AND "B/FUEL SCHDL"
Select "A/F ALPHA-B1", "A/F ALPHA-B2", and "B/FUEL SCHDL" in "SPEC" of "DATA MONITOR" mode, and check that each indication is within the SP value.
Is the measurement value within the SP value?
YES >> Inspection END
NO >> "B/FUEL SCHDL" is more, "A/F ALPHA-B1", "A/F ALPHA-B2" are less than the SP value: GO TO 21 21.DISCONNECT AND RECONNECT MASS AIR FLOW SENSOR HARNESS CONNECTOR
Stop the engine.
Disconnect mass air flow sensor harness connector. Check pin terminal and connector for damage and then reconnect it again. >> GO TO 22.
22.CHECK "A/F ALPHA-B1", "A/F ALPHA-B2"
Start engine.
Select "A/F ALPHA-B1", "A/F ALPHA-B2" in "SPEC" of "DATA MONITOR" mode, and check that each indication is within the SP value. Is the measurement value within the SP value?
YES >> Detect malfunctioning part of mass air flow sensor circuit and repair it. Refer to See: A L L Diagnostic Trouble Codes ( DTC )\Testing and Inspection\P Code Charts\P0102. Then GO TO 29.
NO >> GO TO 23. 23.CHECK "MAS A/F SE-B1"
Select "MAS A/F SE-B1" in "SPEC" of "DATA MONITOR" mode, and check that the indication is within the SP value.
Is the measurement value within the SP value?
YES >> GO TO 24.
NO >> More than the SP value: Replace mass air flow sensor, and then GO TO 29. 24.REPLACE ECM
25.CHECK INTAKE SYSTEM
Check for the cause of uneven air flow via the mass air flow sensor. Refer to the following.
Crushed air ducts
Malfunctioning seal in air cleaner element
Uneven dirt in air cleaner element
Improper specification in intake air system Is the Inspection result normal?
YES >> GO TO 27.
NO >> Repair or replace malfunctioning part, and then GO TO 26. 26.CHECK "B/FUEL SCHDL"
Select "B/FUEL SCHDL" in "SPEC" of "DATA MONITOR" mode, and check that the indication is within the SP value.
Is the measurement value within the SP value?
YES >> Inspection END
NO >> Less than the SP value: GO TO 27. 27.CHECK "MAS A/F SE-B1"
Select "MAS A/F SE-B1" in "SPEC" of "DATA MONITOR" mode, and check that the indication is within the SP value.
Is the measurement value within the SP value?
YES >> GO TO 28.
NO >> Less than the SP value: Replace mass air flow sensor, and then GO TO 30. 28.CHECK INTAKE SYSTEM
Check for the cause of air leakage after the mass air flow sensor. Refer to the following.
Disconnection, looseness, and cracks in air duct
Looseness of oil filler cap
Disconnection of oil level gauge
Open stuck, breakage, hose disconnection, or cracks in PCV valve
Disconnection or cracks in EVAP purge hose, stuck open EVAP canister purge volume control solenoid valve
Malfunctioning seal in rocker cover gasket
Disconnection, looseness, or cracks in hoses, such as a vacuum hose, connecting to intake air system parts
Malfunctioning seal in intake air system, etc. >> GO TO 30.
29.CHECK "A/F ALPHA-B1", "A/F ALPHA-B2", AND "B/FUEL SCHDL"
Select "A/F ALPHA-B1", "A/F ALPHA-B2", and "B/FUEL SCHDL" in "SPEC" of "DATA MONITOR" mode, and check that each indication is within the SP value.
Is the measurement value within the SP value?
YES >> Inspection END
NO >> Detect malfunctioning part according to See: Symptom Related Diagnostic Procedures. 30.CHECK "B/FUEL SCHDL"
Select "B/FUEL SCHDL" in "SPEC" of "DATA MONITOR" mode, and then check that the indication is within the SP value.
Is the measurement value within the SP value?
YES >> Inspection END
NO >> Detect malfunctioning part according to See: Symptom Related Diagnostic Procedures.
