Mitsubishi Eclipse Technical Information Manual page 179

Second Gear EMCC
When conditions allow for it, the TCM pulses or
modulates the LWCC solenoid. This is called Elec-
tronically Modulated Converter Clutch (EMCC), as
mentioned earlier. By pulsing or modulating the sole-
noid, the TCM can lower the line pressure that
passes through the solenoid before reaching the
converter clutch and torque converter control valves.
When the modulated pressure reaches the two
valves, it fully moves the T/C control valve to the
SECOND GEAR
EMCC
POWER TRAIN
SECOND GEAR
left, but only partially moves the CC control valve.
When the T/C control valve moves, it vents the
fluid from the front side of the torque converter pis-
ton. At the same time, the CC control valve provides
modulated pressure to the back side of the torque
converter piston. This condition does not cause the
torque converter piston to fully engage but instead
regulates the amount of slippage (partial engage-
ment).
LR = Low reverse
UD = Underdrive
AC = Accumulator
PT = Pressure tap
S = Solenoid
n
24 = 2-4 clutch
OD = Overdrive
SW = Switch
CC = Converter CL
D = Dribbler
V = Vent