Pressure Control

Pressure control (duty-cycle motor) solenoid has a spool valve and operates pressure regulator valve. See Figure. The computer sends a frequency signal to the pressure control solenoid to regulate hydraulic line pressure. The frequency signal (duty cycle) is measured with a dwell meter or lab scope. When the duty cycle is zero, line pressure is at maximum, and pressure control solenoid draws zero amp. When the duty cycle is 60%, line pressure is at minimum, and pressure control solenoid draws 1.1 amps at 4-5 volts.