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EC-160 < DTC/CIRCUIT DIAGNOSIS > [MRA8DE] TROUBLE DIAGNOSIS - SPECIFICATION VALUE NOTE: Check “A/F ALPHA-B1” for approximately 1 minute because it 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 14. 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 make sure that the indication is within the SP value. YES >> GO TO 4. NO >> More than the SP value: GO TO 16. 3. CHECK “B/FUEL SCHDL” Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is 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 22. 4. CHECK “A/F ALPHA-B1” 1. Stop the engine. 2. Disconnect PCV hose, and then plug it. 3. Start engine. 4. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the 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 1. Stop the engine. 2. 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 con- dition. >> INSPECTION END 6. PERFORM POWER BALANCE TEST 1. Perform “POWER BALANCE” in “ACTIVE TEST” mode. 2. Make sure that the each cylinder produces a momentary engine speed drop. YES >> GO TO 9. NO >> GO TO 7. 7. DETECT MALFUNCTIONING PART Check the following. 1. Ignition coil and its circuit (Refer to EC-456, "Component Function Check" 2. Fuel injector and its circuit (Refer to EC-450, "Component Function Check" 3. Intake air leakage 4. Low compression pressure (Refer to .) Is the inspection result normal? |