1. Run window up NOT using the express feature (holding down switch).
2. On the motor is a rubber switch that looks like a plug. Push in and hold the rubber switch (plug) down while manually operating the door glass to the full down position. DO NOT use the express feature.
3. Then operate the express feature two or three more time, up and down.
(note: on at least the 350Z, there is a hole to give EASY access the rubber switch!!)