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TROUBLE DIAGNOSIS - SPECIFICATION VALUE EC-137 < SERVICE INFORMATION > [VQ35DE] C D E F G H I J K L M A EC N P O 2. Disconnect mass air flow sensor harness connector. Check pin terminal and connector for damage and >> GO TO 22. 22. CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2” 1. Start engine. 2. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and make sure that the OK or NG OK >> 1. Detect malfunctioning part of mass air flow sensor circuit and repair it. . 2. GO TO 29. NG >> GO TO 23. 23. CHECK “MAS A/F SE-B1” Select “MAS A/F SE-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within the OK or NG OK >> GO TO 24. NG (More than the SP value)>>Replace mass air flow sensor, and then GO TO 29. 24. REPLACE ECM 1. Replace ECM. 2. Perform initialization of IVIS(NATS) system and registration of all IVIS(NATS) ignition key IDs. BL-187, "ECM Re-Communicating Function" 3. 4. EC-85, "Accelerator Pedal Released Position Learning" 5. EC-85, "Throttle Valve Closed Position Learning" . 6. EC-85, "Idle Air Volume Learning" >> GO TO 29. 25. CHECK INTAKE SYSTEM Check for the cause of uneven air flow through mass air flow sensor. Refer to the following. OK >> GO TO 27. NG >> 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 make sure that the indication is within the OK >> INSPECTION END NG (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 make sure that the indication is within the OK >> GO TO 28. NG (Less than the SP value)>>Replace mass air flow sensor, and then GO TO 30. 28. CHECK INTAKE SYSTEM |