On Board Refueling Vapor Recovery System: Notes
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 Nissan Xterra, 2003 Nissan Sentra, 2003 Nissan Pathfinder, 2003 Nissan Murano, and 2003 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
When refueling vehicle, fuel tank pressure increases. When pressure reaches the setting value of the Refueling Control Valve (RCV) opening pressure, RCV opens. Allowing air and vapor pressure in fuel tank to pass through EVAP vapor cut valve into the EVAP canister. Where fuel vapors are absorbed by EVAP canister activated charcoal and air is purged to atmosphere. When during refueling process fuel tank becomes full, refueling EVAP vapor cut valve is closed and refueling is stopped by auto shut-off. Vapors stored while fueling are purged when vehicle is driven. RCV is closed during driving and EVAP system operates same as in conventional systems.