Brief description of components

Servotronic valve 

The Servotronic valve is an electro-hydraulic converter located in the hydraulic oil circuit of the power steering. The valve has a variable shutter that throttles the oil flow to varying degrees depending on activation. The shutter diameter is varied by a speed-dependent flow characteristic curve

Control module 

The Servotronic function is integrated in the junction box electronics (JBE). The Junction Box electronics regulate the Servotronic valve. The characteristic curve for the speed-dependent activation of the Servotronic valve is stored as codable in a non-volatile memory.

The following messages or signals, among others, are required for the Servotronic function:

• Road speed from the DSC control module via the PT-CAN.
• Status of engine from the DME control module via the PT-CAN.
• Terminal status of the CAS control module via the K-CAN.