Acura 1994 Integra Service Manual page 430

In E
position in 2nd, 3rd and 4th, and @ position in 3rd, pressurized fluid is drained from the back of the torque con-
verter through an oil passage, causing the lock-up piston to be held against the torque converter cover. As this takes
place, the mainshaft rotates at the same speed as the engine crankshaft. Together with hydraulic control, the TCM op-
timized the timing ot the lock-up system. Under certain conditions, the lock-up clutch is applied during deceleration, in
3rd and 4th sDeed.
The lock-up system controls the range of lock-up according to lock-up control solenoid valves A and B, and throttle valve B.
When lock-up control solenoid valves A and B activate. modulator pressure changes. Lock-up control solenoid valves
A and B are mounted on the torque converter housing, and are controlled by the TCM.
N O T E :
When used, "left" or " tight" indicates direction on the tlowchart.
LOCK IJP COIITBOL
\
Solenoid valve
L""f."p
"."aiti""\
B
Lock-up OFF
O F F
O F F
Lock-up, slight
O N O F F
Lock-up, half
O N O N
Lock-up. full O N
O N
Lock-up
during deceleration
O N
Duty operation
O F F - O N
LOCI( UP TIMII{G B VAIVE
{cont'd)
ott coot€R
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