Xterra XE 4WD V6-3.3L SC (VG33ER) (2002)
Vacuum Cut Valve Bypass Solenoid: Description and Operation
Description
COMPONENT DESCRIPTION
The vacuum cut valve and vacuum cut valve bypass valve are installed in parallel on the EVAP purge line between the fuel tank and the EVAP canister.
The vacuum cut valve prevents the intake manifold vacuum from being applied to the fuel tank.
The vacuum cut valve bypass valve is a solenoid type valve and generally remains closed. It opens only for on board diagnosis. The vacuum cut valve
bypass valve responds to signals from the ECM. When the ECM sends an ON (ground) signal, the valve is opened. The vacuum cut valve is then
bypassed to apply intake manifold vacuum to the fuel tank.
Evaporative Emission System Diagram