SOLENOID VALVE [EV6A-EL, EV6AX-EL]

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Purpose/Function

•  The solenoid valve implements shift point control, shift hydraulic pressure control, and TCC control by adjusting the pressure in each circuit based on the control signal from the TCM.
•  The part name of each solenoid valve and function are as follows.

Part name

Function
Pressure control solenoid
•  Adjusts the pressure control solenoid pressure to control line pressure.
Shift solenoid No.1
•  Adjusts the hydraulic pressure in the low clutch circuit.
Shift solenoid No.2
•  Adjusts the hydraulic pressure in the 2-6 brake circuit.
Shift solenoid No.3
•  Adjusts the hydraulic pressure in the R-3-5 brake circuit.
Shift solenoid No.4
•  Adjusts the hydraulic pressure in the high clutch circuit and the low and reverse brake circuit.
Torque converter clutch (TCC) control solenoid
•  Adjusts the hydraulic pressure in the lock-up control circuit.
On/off solenoid
•  Performs switching of the shift valve in the control valve body.


Construction

•  Each type of solenoid valve is as follows.

Item

Type
Pressure control solenoid
Normal open-type linear solenoid
Shift solenoid No.1
Normal closed-type linear solenoid
Shift solenoid No.2
Normal closed-type linear solenoid
Shift solenoid No.3
Normal open-type linear solenoid
Shift solenoid No.4
Normal open-type linear solenoid
TCC control solenoid
Normal closed-type linear solenoid
On/off solenoid
Normal open-type on/off solenoid

•  Each solenoid valve is installed to the solenoid control valve body.
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Operation

•  Each solenoid valve operates as follows.

Item

Operation
Pressure control solenoid
•  Adjusts the pressure control solenoid pressure by increasing/decreasing the energization current to the pressure control solenoid according to the signal from the TCM.
Shift solenoid No.1
•  Adjusts the low clutch pressure by increasing/decreasing the energization current to shift solenoid No.1 according to the signal from the TCM.
Shift solenoid No.2
•  Adjusts the 2-6 brake pressure by increasing/decreasing the energization current to shift solenoid No.2 according to the signal from the TCM.
Shift solenoid No.3
•  Adjusts the R-3-5 brake pressure by increasing/decreasing the energization current to shift solenoid No.3 according to the signal from the TCM.
Shift solenoid No.4
•  Adjusts the high clutch pressure and the low and reverse brake pressure by increasing/decreasing the energization current to shift solenoid No.4 according to the signal from the TCM.
TCC control solenoid
•  Adjusts the TCC control clutch pressure by increasing/decreasing the energization current to the TCC control solenoid according to the signal from the TCM.
ON/OFF solenoid
Non-energization (OFF)
•  When the on/off solenoid is off, the supply port in the solenoid opens. As a result, hydraulic pressure is supplied to operate the shift valve.
Energized (ON)
•  When the on/off solenoid is on, the drain port in the solenoid opens. As a result, hydraulic pressure which operates the shift valve is drained.