Kickdown Control
WARNING: This page is about a different car, the 2003 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.
During sudden deceleration, determine if it is a sudden deceleration from the throttle position to secure the highly responsive driving force as necessary. When it is judged as sudden deceleration, speed up the shift pattern faster than normal depression for a certain period of time, and slowly shift gears to get highly responsive shift pattern.