Explorer Sport Trac 4WD V6-245 4.0L SOHC VIN K SFI (2001)
Pressure Regulating 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 solenoids control clutch application pressures.
NOTE: Transmissions with identification tag IL5P-DA or IL5P-EA only, will have adaptive shift strategy.
The PCM has an adaptive learn strategy to electronically control the transmission which will automatically adjust the shift feel. When the battery has
been disconnected, or a new battery installed, certain transmission operating parameters may be lost. The PCM must relearn these parameters. During
this learning process you may experience slightly firm shifts, delayed, or early shifts. This operation is considered normal and will not affect the function
of the transmission. Normal operation will return once these parameters are stored by the PCM.
