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TROUBLE DIAGNOSIS - SPECIFICATION VALUE EC-121 < DTC/CIRCUIT DIAGNOSIS > [HR12DE (TYPE 1)] C D E F G H I J K L M A EC N P O 3. Check pin terminal and connector for damage, and then reconnect it again. >> GO TO 22. 22. CHECK “A/F ALPHA-B1” 1. Start engine. 2. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within Is the measurement value within the SP value? YES >> Detect malfunctioning part of mass air flow sensor circuit and repair it. Refer to . 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 make sure that the indication is within the YES >> GO TO 24. NO >> More than the SP value: Replace mass air flow sensor (refer to ), and then GO TO 29. 24. REPLACE ECM 1. Replace ECM. Refer to . 2. . >> GO TO 29. 25. CHECK INTAKE SYSTEM Check for the cause of uneven air flow through mass air flow sensor. Refer to the following. 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 make sure that the indication is within the 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 make sure that the indication is within the YES >> GO TO 28. NO >> Less than the SP value: Replace mass air flow sensor (refer to then GO TO 30. 28. CHECK INTAKE SYSTEM Check for the cause of air leak after the mass air flow sensor. Refer to the following. |