Mitsubishi Lancer Evolution-VII Workshop Manual page 64

Proportional
From electric pump
valve (OFF)
Proportional
From electric pump
valve (ON)
Return
To ACD hydraulic multi plate
clutch or AYC directional valve
From proportional
valve <AYC>
Directional
valve (OFF)
To clutch
<Left side>
From proportional valve
Directional valve
(Right side: ON) <AYC>
To clutch
<Left side>
POWER TRAIN - ACD and AYC
When the proportional valve is OFF, the oil pressure from
the electric pump will be cut off by the proportional valve.
For this reason, oil pressure will be supplied to the ACD
or AYC and each system will be set into the non-operating
state.
When the proportional valve turns ON, the proportional valve
opens, and the oil pressure from the electric pump will be
supplied to the ACD hydraulic multi plate clutch or AYC
directional valve.
Directional valve
Supplies the oil pressure required for controlling the AYC
clutch according to the instructions of the 4WD-ECU.
Directional
valve
When the directional valve is OFF, the oil pressure from the
proportional valve <AYC> will be cut off by the directional
valve. For this reason, the clutch will set into the non-operating
state without oil pressure supplied to each clutch of the AYC.
To clutch
<Right side>
When oil pressure supply signal for the AYC clutch <Right
side> is sent to the directional valve from the 4WD-ECU,
the directional valve will move to the right. As a result, the
oil pressure from the proportional valve <AYC> will be supplied
to the AYC clutch <Right side>.
If the oil pressure supply signal to the AYC clutch <Left side>
is sent to the directional valve, the directional valve will move
to the left.
To clutch
<Right side>
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