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P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR EC-273 < DTC/CIRCUIT DIAGNOSIS > [VQ40DE] C D E F G H I J K L M A EC N P O • Harness for open or short between EVAP control system pressure sensor and ECM >> Repair open circuit or short to ground or short to power in harness or connectors. 9. CHECK RUBBER TUBE 1. Disconnect rubber tube connected to EVAP canister vent control valve. 2. Check the rubber tube for clogging, vent and kinked. OK >> GO TO 10. NG >> Clean the rubber tube using an air blower, repair or replace rubber tube. 10. CHECK EVAP CANISTER VENT CONTROL VALVE EC-255, "Component Inspection" OK or NG OK >> GO TO 11. NG >> Replace EVAP canister vent control valve. Refer to FL-16, "Removal and Installation" . 11. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR EC-274, "Component Inspection" OK or NG OK >> GO TO 12. NG >> Replace EVAP control system pressure sensor. Refer to FL-16, "Removal and Installation" . 12. CHECK DRAIN FILTER EC-274, "Component Inspection" OK or NG OK >> GO TO 13. NG >> Replace drain filter. Refer to . 13. CHECK IF EVAP CANISTER IS SATURATED WITH WATER 1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached. Refer to FL-16, "Removal and Installation" . 2. Check if water will drain from the EVAP canister. Yes >> GO TO 14. No >> GO TO 16. 14. CHECK EVAP CANISTER Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached. The weight should be less than 2.0 kg (4.4 lb). OK or NG OK >> GO TO 16. NG >> GO TO 15. 15. DETECT MALFUNCTIONING PART Check the following. • EVAP canister for damage • EVAP hose between EVAP canister and drain filter for clogging or poor connection BBIA0558E August 2012 2012 Pathfinder |