Leak Detection Valve: Description and Operation

The canister vent solenoid (OBD II only):
^ is normally open.
^ seals the evaporative emissions system for the OBD II leak and pressure tests.
^ is mounted to the evaporative emissions canister.
^ is repaired as a separate item.

During the Evaporative Emission Running Loss System Test Monitor, Evaporative Emissions Repair Verification Drive Cycle and the Evaporative Emission System Leak Test, the canister vent solenoid is closed, to allow either a vacuum to be drawn on the fuel tank or to hold a specified pressure in the system.