SOLENOID VALVE [ET6A-EL, ET6AX-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 torque converter clutch (TCC) 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
Normally open type linear solenoid
Shift solenoid No.1
Normally closed type linear solenoid
Shift solenoid No.2
Normally closed type linear solenoid
Shift solenoid No.3
Normally open type linear solenoid
Shift solenoid No.4
Normally open type linear solenoid
TCC control solenoid
Normally closed type linear solenoid
On/off solenoid
Normally 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.