Drain Valve
See FUEL EVAPORATIVE SYSTEM under EMISSION SYSTEMS.
Drain Filter
The drain filter is installed at the air inlet port of the vent control solenoid valve. It cleans the air taken in the canister through the vent control solenoid valve.
Scheme 1
The drain valve is located on the line connecting the drain filter and canister, just below the drain filter. The drain valve is forcibly closed by a signal from the ECM while the evaporation system diagnosis is being conducted.