Explorer 4WD V6-4.0L VIN E (1999)
Electronic Pressure Control Solenoid: Description and Operation
ELECTRONIC PRESSURE CONTROL (EPC) SOLENOID
The Electronic Pressure Control (EPC) solenoid is a Variable Force Style (VFS) solenoid. The VFS type solenoid is an electro-hydraulic actuator
combining a solenoid and a regulating valve.
The Powertrain Control Module (PCM) varies the current to the EPC solenoid.
This action causes the solenoid to regulate transmission line pressure and line modulator pressure. This is done by producing resisting forces to the
main regulator and line modulator circuits. These two pressures control clutch application pressures.
