1. Check Rubber Tube

1. Turn ignition switch OFF.
2. Disconnect rubber tube connected to EVAP canister vent control valve.
   Fig 1: Identifying EVAP Canister Vent Control Valve

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check the rubber tube for clogging.

OK or NG 

1. OK: GO TO 2.
2. NG: Clean rubber tube using an air blower.