Plug the OBD II code reader into the DLC and then turn the ignition key to the key-on/engine-off position. This position is two forward clicks in the ignition that will power the Subaru Forester's electrical components without starting the engine. This will also provide portable power to the OBD II code reader.
Turn the ignition key two clicks in the ignition. This should be the accessory position (also known as key-on/engine-off) which provides power to the electrical system without the engine running.