Back-up Control (Engine brake)

If the selector lever is shifted to "2" position while driving in D⁴ (OD) or D³ , great driving force is applied to the clutch inside the transmission. Clutch operating pressure (line pressure) must be increased to deal with this driving force.

Fig 1: Line Pressure Graph (Back-Up Control (Engine Brake))

Courtesy of NISSAN MOTOR CO., U.S.A.