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EC-294 < DTC/CIRCUIT DIAGNOSIS > [MR18DE] P0456 EVAP CONTROL SYSTEM 1. Remove EVAP canister (1) with EVAP canister vent control 2. Check if water will drain from the EVAP canister. Does water drain from EVAP canister? YES >> GO TO 8. NO-1 >> With CONSULT: GO TO 10. NO-2 >> Without CONSULT: GO TO 11. 8. CHECK EVAP CANISTER Weigh the EVAP canister assembly with the EVAP canister vent control valve and EVAP control system pres- Is the inspection result normal? YES-1 >> With CONSULT: GO TO 10. >> GO TO 9. 9. DETECT MALFUNCTIONING PART Check the following. >> Repair hose or replace EVAP canister. Refer to 10. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION With CONSULT 1. Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port. 2. Start engine and let it idle. 3. Select “PURG VOL CONT/V” in “ACTIVE TEST” mode. 4. Touch “Qu” on CONSULT screen to increase “PURG VOL CONT/V” opening to 100%. 5. Check vacuum hose for vacuum. Is the inspection result normal? YES >> GO TO 13. NO >> GO TO 12. 11. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION Without CONSULT 1. Start engine and warm it up to normal operating temperature. 2. Stop engine. 3. Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port. 4. Start engine and let it idle for at least 80 seconds. 5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm. Is the inspection result normal? YES >> GO TO 13. NO >> GO TO 12. 12. CHECK VACUUM HOSE Check vacuum hoses for clogging or disconnection. Refer to Is the inspection result normal? PBIB2731E Vacuum should exist. Vacuum should exist. |