Acura NSX 1997 Service Manual page 394

Main Menu
Full Lock-up
Lock-up Control Solenoid Valve A: ON
When the vehicle speed further increases, the throttle B pressure is increased in accordance with the throttle opening.
The lock-up timing valve B overcomes the spring force and moves to the left side. Also this valve closes the fluid port
leading to the torque converter check valve.
Under this condition, the throttle B pressure working on the right end of the lock-up control valve becomes greater than
that on the left end (modulator pressure in the left end has already been released by the solenoid valve B); i. e., the lock-
up control valve is moved to the left side. As this happens, the torque converter back pressure is released fully, causing
the lock-up clutch to be engaged fully.
NOTE: When used, "left" or "right" indicates direction on the hydraulic circuit.
Table of Contents
Lock-up Control Solenoid Valve B: ON