mercedesbenz Workshop Repair Guides

Mercedes Benz Workshop Service and Repair Manuals

Power Steering Pressure Control Valve|Description and Operation|Page 8949 > < Power Steering - Horn Like Noises When Turning|Page 8945
Page 1
background image

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.

Power Steering Pressure Control Valve|Description and Operation|Page 8949 > < Power Steering - Horn Like Noises When Turning|Page 8945