Electronic Pressure Control (EPC) Solenoid

DESCRIPTION
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. This solenoid provides electronic pressure control (EPC) which regulates line pressure (LP) and line modulator (LM) pressure. This is controlled by producing a resisting pressure to the main regulator and line modulator circuits. The LP and LM pressures control the clutch application pressures.

SYMPTOMS
- Failed ON- Minimum EPC pressure (minimum transaxle torque capacity). May flash transmission control indicator lamp (TCIL).
- Failed OFF- Maximum EPC pressure, harsh engagements and harsh shifts.

DTC's
P1746*: Open PCM Output Driver
P1747*: EPC Solenoid Circuit Failure

* Output circuit check, generated only by an electrical condition.