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P014C, P014D, P015A, P015B A/F SENSOR 1 EC-901 < DTC/CIRCUIT DIAGNOSIS > [MR EXCEPT FOR NISMO RS MODELS] C D E F G H I J K L M A EC N P O Is “PRSNT” displayed on CONSULT screen? YES >> GO TO 4. NO >> GO TO 3. 3. PERFORM DTC CONFIRMATION PROCEDURE-2 With CONSULT Perform DTC confirmation procedure-1 again. YES >> GO TO 4. NO >> Refer to EC-785, "Component Function Check" . 4. PERFORM DTC CONFIRMATION PROCEDURE-2 With CONSULT 1. Wait for about 20 seconds at idle. 2. Check the items status of “DATA MONITOR” as follows. NOTE: If “CMPLT” changed to “INCMP”, refer to EC-785, "Component Function Check" Is “CMPLT” displayed on CONSULT screen? YES >> GO TO 5. NO >> Refer to EC-785, "Component Function Check" . 5. PERFORM SELF-DIAGNOSIS With CONSULT Check the “SELF-DIAG RESULT”. YES >> Proceed to . NO >> INSPECTION END 6. CHECK AIR-FUEL RATIO SELF-LEARNING VALUE With GST 1. Start engine and warm it up to normal operating temperature. 2. Select Service $01 with GST. 3. Calculate the total value of “Short term fuel trim” and “Long term fuel trim” indications. ±15%? YES >> GO TO 8. NO >> GO TO 7. 7. DETECT MALFUNCTIONING PART Check the following. • Intake air leaks • Exhaust gas leaks • Incorrect fuel pressure • Lack of fuel • Fuel injector • Incorrect PCV hose connection • PCV valve • Mass air flow sensor Data monitor item Status A/F SEN1 DIAG3 (B1) PRSNT Data monitor item Status A/F SEN1 DIAG1 (B1) CMPLT A/F SEN1 DIAG2 (B1) |