Pressure Control Valves

WARNING: This page is about a different car, the 2018 Land Rover Discovery Sport. However, it is still accessible from the selected car via links, so may be relevant.

Six PCV's are located in the valve block. The solenoid operated PCV's are controlled by PWM (pulse width modulation) signals from the TCM. The solenoids convert the electrical signals into hydraulic control pressure proportional to the signal to actuate the spool valves and clutches for precise transmission operation.

Five PCV solenoids for the multiplate clutch and the torque converter lock-up clutch supply a higher control pressure as the signal current increases and can be identified by an orange connector cap. The TCM operates the solenoids using PWM signals. The TCM monitors engine load and clutch slip and varies the solenoid duty cycle accordingly. The solenoids have a 12 V operating voltage and a pressure range of 0 - 4.7 bar (0 - 68 lbf.in² ).

One PCV solenoid for the system pressure control supplies a lower control pressure as the signal amperage increases and can be identified by a gray connector cap. The TCM monitors engine load and clutch slip and varies the solenoid duty cycle accordingly. The solenoids have a 12 V operating voltage and a pressure range of 4.7 - 0 bar (68 - 0 lbf.in² ).

The resistance of the solenoid coil winding for all PCV solenoids is 5.05 Ohms at 20 °C (68 °F).