How do you change the cold start valve on a Toyota?

To change the cold start valve on a Toyota, first ensure the engine is cool and disconnect the negative battery terminal. Remove any necessary components obstructing access to the cold start valve, typically located on the intake manifold. Unscrew the old valve using the appropriate tools, clean the mounting surface, and install the new valve with a fresh gasket or O-ring. Finally, reassemble any removed parts, reconnect the battery, and check for leaks after starting the engine.