Shift Solenoid Valve

No.1
This valve switches the hydraulic pressure which acts on the 2 - 3 shift valve. ON and OFF of the power to the solenoid is controlled by Transmission Control Module TCM.

When the solenoid is ON, as the plunger is pulled up to open the fluid passage, the hydraulic pressure is relieved and not applied to the 2 - 3 shift valve.

When the solenoid is OFF, as the plunger does not move and the fluid passage is closed to maintain the hydraulic pressure, the hydraulic pressure applied to (1) is then applied to the 2 - 3 shift valve.





No.2
This valve switches the hydraulic pressure to the 1 - 2 shift valve and 3 - 4 shift valve. ON and OFF of the power to its solenoid is controlled by TCM.

When the solenoid is ON, as the plunger is pulled up to open the fluid passage, the hydraulic pressure is relieved and not applied to the 1 - 2 shift valve or 3 - 4 shift valve.

When the solenoid is OFF, as the plunger does not move and the fluid passage is closed to maintain the hydraulic pressure, the hydraulic pressure applied to (1) is then applied to the 1 - 2 shift valve and 3 - 4 shift valve.