September 30: LEMON manuals is back up on a temporary server! Slowness is possible
Back-up Control (Engine Brake)
WARNING: This page is about a different car, the 2005 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.
When the select operation is performed during driving and the transmission is shifted down, the line pressure is set according to the vehicle speed.
Courtesy of NISSAN MOTOR CO., U.S.A.