Fuel Pressure Release
WARNING: This page is about a different car, the 2002 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
Working from inside luggage compartment, disconnect fuel pump connector on top of fuel tank. Start engine. When engine stops running, turn ignition off, and disconnect negative battery cable. Place suitable container under fuel line. Cover fuel line connection with shop towel. Slowly loosen fuel line connection to release fuel pressure. Once fuel pressure is released, plug openings with rubber plugs. Reconnect fuel pump connector.