Mercedes-Benz W211, R230 manual Driving with SBC Pre-Drive Check PDC

Page 9

Driving with SBC – Pre-Drive Check (PDC)

When SBC performs a PDC after a "wake-up", the following are checked:

Warning! Pressure is applied to brake calipers (~60 bar)

•reservoir pressure (if low, it will be corrected by running the high pressure charge pump in the hydraulic unit)

•pressure sensors

•control valves

•leak tests

•operational checks

Note: self-tests are constantly conducted during driving (~ once every 16

brake applications)	9

Image 9

Contents SBC Sensotronic Brake ControlObjectives Contents SBC Incorporates these Functions Advantages of SBC Advantages of SBC Advantages of SBC Driving with SBC Wake-Up Driving with SBC Pre-Drive Check PDC Driving with SBC Delayed Off Function Page Page SBC Components SBC W211 System OverviewR230 System Overview X11/4 Diagnosis Connection Brake Operating Unit BOU Brake Operating Unit Master Cylinder Fluid Reservoir Cover Pedal Value Sensor B37/1 Fluid reservoir BOU Tandem Master CylinderNormal Braking Light Pressure Normal Braking Increased Pressure Normal Braking Strongest Feedback Emergency Operation Traction System Hydraulic Unit A7/3 Traction System Hydraulic Unit A7/3 Page Emergency Operation Circuit Brake Pressure Supply Three Pressure Stages Pressure Apply Rear Wheels Pressure Apply Front Wheels Pressure Apply All Wheels Pressure Hold All Wheels Pressure Reduction All Wheels Temperature Compensation Deactivation Deactivation Pressure at A7/3b2 System Activation System Activation Activation Left Front Activation Right Front Activation Right Rear Activation Left Rear Activation Recharge Proper system bleeding is critical Follow directions in SDS Bleeding the Brake SystemEquipment Required Connect equipment and follow steps in SDS Acronym List Appendix