Miscellaneous Controls: Transmission: Solenoids
WARNING: This page is about a different car, the 1995 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
Transmission solenoids are used to shift transmission gear ratios, connect turbine and impeller inside torque converter, and provide coasting on deceleration. Ground signal is controlled by PCM. Power is supplied to solenoids from the power relay.