Specifications

Testing Testing ABS and Traction Control Systems

Corner Brake Control (CBC)

If the DSC III system detects transverse acceleration in excess of 0.6 G-Force and the brakes are

applied, it activates the CBC subsystem which limits brake pressure to the inside rear wheel to

counteract oversteer. The difference in braking force between the two rear wheels creates an

oversteer opposing force. The DSC III control unit closes the inlet valve, limiting brake pressure at

the inside wheel brake caliper.

NOTE:

i CBC will not activate if ABS is engaged.

Electronic Brake Force Distribution (EBV)

Electronic Brake Force Distribution (EBV) adjusts brake pressure based on the rate of rear axle

slowdown, ensuring even brake force between the front and rear of the vehicle. With a high load

in the vehicle, the rear axle takes longer to slow down, which means rear wheel brakes can then

be applied at a higher pressure. Conversely, with a low load, brake pressure must be lowered to

keep the vehicle stable. The control unit monitors the wheel speed when the brakes are applied

and compares the deceleration rate of the front and rear axle to determine if the real axle brake

pressure should be increased or decreased.

EBV has the following advantages:

• Brake force is more evenly distributed.

• Vehicle rear wheel brake size can be increased.

• Front and rear brake wear will be more equal.

Automatic Stability (Slip) Control (ASC+T)

ASC controls drive wheel slip. The DSC III control unit determines if there is traction loss due to

excessive wheel slip based on wheel speed sensor input.

The DSC III system controls wheel slip using two subsystems:

• Automatic Stability (Slip) Control (ASC)—engine Intervention

• Automatic Differential Brake (ADB)—brake intervention

ASC Engine Intervention

Engine torque may be reduced by one of three methods:

• Reducing the throttle opening angle

• Retarding the ignition

• Canceling fuel to individual cylinders

The DSC III control unit determines the amount of torque reduction that is necessary and sends

the request for regulation to the DME via the CAN bus.