E 320 4MATIC Wagon (210.282) V6-3.2L (112.941) (1998)
Power Steering Pressure Control Valve: Description and Operation
P Valve-Purpose, Design And Function (Part 1 Of 2)
P Valve-Purpose, Design And Function (Part 2 Of 2)
FUNCTION OF SPS P-VALVE
The P-valve is actuated in cycles with approx. 6V by the Electronic Traction System (ETS), Acceleration Slip Regulation (ASR) or Electronic
Stability Program (ESP) control module.
K Characteristic
As vehicle speed increases the current flow reduces and the P-valve opens the control restrictor continuously in accordance with a characteristic
(K) defined in the control module. Consequently the oil flow is controlled and also the steering wheel torque.