Canister Purge Solenoid: Description and Operation

PURPOSE/OPERATION
The purge control solenoid valve is an electromechanical, vacuum switching valve. When the engine control module senses conditions suitable for purge operation, it supplies the ground circuit to the solenoid. The plunger in the solenoid moves, connecting the inlet and outlet ports. This allows vacuum to be applied to the purge port of the canister.