RAM 3500 HD Truck 2WD L6-6.7L DSL Turbo (2008)
Fluid Pressure Sensor/Switch: Description and Operation
Description
DESCRIPTION
The TCM utilizes a closed-loop system to control transmission line pressure. The system contains a variable force style solenoid, the Pressure Control
Solenoid, which is part of the pressure switch assembly. The solenoid is duty cycle controlled by the TCM to vent the unnecessary line pressure supplied
by the oil pump back to the pump inlet. The system contains a Line Pressure Sensor, which is a direct input to the TCM. The line pressure sensor
monitors the transmission line pressure and completes the feedback loop to the TCM. The TCM uses this information to adjust its control of the pressure
control solenoid to achieve the desired line pressure.
