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EC-310 < DTC/CIRCUIT DIAGNOSIS > [VQ40DE] P0447 EVAP CANISTER VENT CONTROL VALVE 2. Check portion B of EVAP canister vent control valve for being rusted. 3. Check air passage continuity and operation delay time under the following conditions. Make sure that new O-ring is installed properly. Operation takes less than 1 second. If NG, go to next step. 4. Clean the air passage (portion A to B) of EVAP canister vent control valve using an air blower. DRAIN FILTER 1. Check visually for insect nests in the drain filter air inlet. PBIB1033E Condition Air passage continuity between (A) and (B) 12V direct current supply between No OFF Yes PBIB1034E PBIB3641E |