Honda Acura NSX 1991 Service Manual page 432

Description
Lock-up System (cont'd)
Deceleration Lock-up
Lock-up Control Solenoid Valve B: Duty Operation (ON * OFF)
Lock-up Control Solenoid Valve A: ON
The A/T control unit switches the solenoid valve B to ON and OFF alternately at high speeds under certain conditions.
The slight lock-up and half lock-up regions are maintained so as to lock the torque converter properly.
NOTE: When used, "left" or "right" indicates direction on the flow chart.
T H R O T T L E B P R E S S U R E
VALVE E