Circuit Description

Pressure Control Solenoid (PCS) is used to regulate line pressure. PCS consists of an electrical connector, coil, armature, regulating spring and a poppet valve. PCS is attached to upper control valve body. PCM compares TP sensor voltage, fluid temperature, gear status and other inputs to determine line pressure appropriate for given load. PCM will regulate pressure by applying varying amperage to PCS. Applied amperage can vary from .1-1.1 amps. PCM then monitors amperage at return line. DTC P0748 will set when PCM detects a continuous open, short to voltage or short to ground in PCS circuit to PCS solenoid.