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EC-164 < DTC/CIRCUIT DIAGNOSIS > [QR25DE] TROUBLE DIAGNOSIS - SPECIFICATION VALUE 8. 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 the SP value. Is the measurement value within the SP value? YES >> INSPECTION END NO >> GO TO 9. 9. 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 12. NO >> GO TO 10. 10. DETECT MALFUNCTIONING PART Check the following. 1. Ignition coil and its circuit (Refer to EC-473, "Component Function Check" 2. Fuel injector and its circuit (Refer to EC-467, "Component Function Check" 3. Intake air leakage 4. Low compression pressure (Refer to .) Is the inspection result normal? YES >> Replace fuel injector, refer to EM-45, "Removal and Installation" , and then GO TO 11. NO >> Repair or replace malfunctioning part and then GO TO 11. 11. 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 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. • For DTC P0130, refer to . • For DTC P0131, refer to . • For DTC P0132, refer to . • For DTC P014C, P014D, P15A, P15B refer to . • For DTC P2096, P2097, refer to . Is any DTC detected? 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” 1. Start engine. 2. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the each indication is within the SP value. Is the measurement value within the SP value? YES >> INSPECTION END NO >> GO TO 15. |