Circuit/System Description

Pressure control solenoid valve 3 is part of the control solenoid valve assembly which has no serviceable components. The normally high pressure control solenoid valve 3 regulates and directs fluid pressure to the R1/4-5-6 regulator valve. Increasing pressure control solenoid valve 3 pressure increases pressure to the low and reverse clutch or 4-5-6 clutch, depending on the position of the clutch select valve. The transmission control module (TCM) varies current to pressure control Solenoid valve 3 by controlling the time the low side driver is ON and OFF. Decreasing the current to pressure control solenoid valve 3 increases fluid pressure by closing off the solenoid valve exhaust port. Increasing the current to the pressure control solenoid valve 3 decreases fluid pressure by opening the exhaust port. Power is supplied to the pressure control solenoid valve 3 by the TCM through a high side driver. The high side driver protects the circuit and components from excessive current flow. If excessive current flow is detected, the high side driver will turn OFF. When the fault is corrected, the high side driver will reset.