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EC-310 < DTC/CIRCUIT DIAGNOSIS > [VQ35DE] P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR 1. Select “EVAP DIAG READY” in “DATA MONITOR” mode of “ENGINE”. 2. Let it idle until “OFF” of “EVAP DIAG READY” changes to “ON”. 3. Turn ignition switch OFF and wait at least 90 minutes. 4. Turn ignition switch ON. 5. Select “EVAP LEAK DIAG” in “DATA MONITOR” mode of “ENGINE”. 6. Check that “EVAP LEAK DIAG” indication. Which is displayed on CONSULT? CMPLT >> GO TO 4. >> 1. Perform DTC CONFIRMATION PROCEDURE again. 2. GO TO 1. 4. PERFORM DTC CONFIRMATION PROCEDURE-3 With CONSULT Check 1st trip DTC. Is 1st trip DTC detected? YES >> Proceed to . NO >> INSPECTION END 5. PERFORM DTC CONFIRMATION PROCEDURE-4 With GST 1. Start engine and let it idle for least 40 seconds. 2. Check 1st trip DTC. Is 1st trip DTC detected? YES >> Proceed to . NO >> GO TO 6. 6. PERFORM DTC CONFIRMATION PROCEDURE-5 With GST 1. Let it idle for at least 2 hours. 2. Turn ignition switch OFF and wait at least 90 minutes. 3. Turn ignition switch ON. 4. Check 1st trip DTC. Is 1st trip DTC detected? YES >> Proceed to . NO >> INSPECTION END Diagnosis Procedure INFOID:0000000009720038 1. CHECK GROUND CONNECTION 1. Turn ignition switch OFF. 2. Check ground connection E38. Refer to Ground Inspection in . Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace ground connection. 2. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER 1. Disconnect EVAP control system pressure sensor harness connector. 2. Check that water is not inside connectors. Is the inspection result normal? |