Acura 2002 RSX Service Manual page 594

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Automatic Transmission

System Description (cont'd)

Lock-up System

The lock-up mechanism of the torque converter clutch operates in E position (2nd. 3rd, 4th and 5th), in Dj position

(2nd and 3rd), and M (manual mode) position (3rd, 4th and sth). The pressurized ftuid

is drained from the back of the

torque converter through a fluid passage, causing the torque converter clutch piston to be held against the torque

convener cover' As this takes place, the mainshaft rotates at the same speed as the engine crankshaft. Together with

the hydraulic control, the PCM optimizes the timing and volume of the lock-up mechanism. When the shitt sotenoid

valve E is turned on by the PClvl, shift solenoid valve E pressure switches the lock-up shift valve lock_uo on and off.

The A,/T clutch pressure control solenoid valve A and the lock-up control valve control the amount of the tocK-uo

c o n d i t i o n s .

Torque Converter Clutch Lock-up ON (Engaging Torque Converter Clutch)

Fluid in the chamber between the torque converter cover and the torque converter clutch piston is drained off, and

fluid entered from the chamber between the pump and stator exerts pressure through thetorque converter clutch

piston against the torque converter cover. The torque converter clutch piston engages with the

torque convener cover;

lhe torque converler clutch lock-up is oN. and the mainshaft rotates at the samelpeed as the engine.

TOROUE CONVERTER

CLUTCH PISTON

The poworflows by way of:

Torque converter cover

Torque convensr clutch piston

Dampor spdng

TOROUE CONVERTER

Torque Converter Clutch Lock-up OFF (Disengaging Torque Converter Clutch)

Fluid entering from the chamber between the torque converter cover and the torque convener clutch Diston Dasses

through the torque converter and goes out from the chambers between the turbine and the stator, and between the

pump and the stator. As a result, the torque converter clutch piston moves away from the torque

converter, and the

torque convener clutch lock-up is released; torque converter clutch lock_up is OFF.

Torque conven€r covet

To ATF cooler

To ATF cooler

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