Fuel Cut-Off Valve & Fill Check Valve (ES300)
WARNING: This page is about a different car, the 2002 Lexus RX 300 and 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect Purge line hose and EVAP line hose from charcoal canister. See Fig 1. Plug cap to air drain hose. Pressurize .58 psi (4 kPa) to purge port and ensure there is ventilation through EVAP line hose. If ventilation is not present, check if there is a blockage in vent line hose and EVAP line hose. If no blockage is present, replace fuel cut off valve and fill check valve.