Maxima SE V6-3.0L (VQ30DE) (1998)
Torque converter clutch control valve operation
Lock-Up Released
The OFF-duration of the torque converter clutch solenoid valve is long, and pilot pressure is high. The pilot pressure pushes the end face of the torque
converter clutch control valve in combination with spring force to move the valve to the left. As a result, converter pressure is applied to chamber A
(torque converter clutch piston release side). Accordingly, the torque converter clutch piston remains unlocked.
Lock-Up Applied
When the OFF-duration of the torque converter clutch solenoid valve is short, pilot pressure drains and becomes low. Accordingly, the control valve
moves to the right by the pilot pressure of the other circuit and converter pressure. As a result, converter pressure is applied to chamber B, keeping the
torque converter clutch piston applied.
Also smooth lock-up is provided by transient application and release of the lock-up.