Shift Control

The shift is regulated entirely by electronic control to accommodate vehicle speed and varying engine operations. This is accomplished by electrical signals transmitted by the revolution sensor and the ECM (throttle opening). This results in improved acceleration performance and fuel economy.

Control of Shift Solenoid Valves A and B 

The shift solenoid valve performs simple ON-OFF operation. When set to ON, the drain circuit closes and pilot pressure is applied to the shift valve.

The TCM activates shift solenoid valves A and B according to signals from the ECM (throttle opening) and revolution sensor to select the optimum gear position on the basis of the shift schedule memorized in the TCM.

Fig 1: Locating Shift Solenoid Valve On-Off Operation

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

Relation between shift solenoid valves A and B and gear positions 

Fig 2: Shift Solenoid Valves Reference Chart (Gear Positions)

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