Maximum Brake Control (MBC)

The MBC function is designed to support driver initiated braking by building up pressure in the rear brake circuit when the front wheels are already in ABS regulation.

The additional braking pressure is applied to bring the rear wheels up to the ABS regulation point shortening the stopping distance. The MBC function is triggered when the brakes are applied more slowly than the threshold needed for a DBC regulation. The triggering conditions are:

• Both front wheels in ABS regulation.
• Vehicle road speed above 3mph (5kmh).
• DBC and pressure sensor initialization test successful.
• Vehicle traveling forward.
• Rear wheels not in ABS regulation.

If the threshold for MBC triggering is achieved, the MK60 control unit will activate a pressure build-up intervention by activating the return pump. The pressure at the rear wheels is increased up to the ABS regulation point. This ensures that the maximum brake force is applied to the vehicle.

The MBC function will be switched off if:

• Front wheels drop out of ABS regulation.
• The driver releases the brake pedal.
• Brake pressure falls below threshold.
• Vehicle road speed below 3mph.

MBC will also be switched off if a fault occurs in with any of the necessary input sensors.

A fault in MBC will illuminate the "BRAKE" (ABL) lamp yellow to warn the driver, depending on the type of failure the DSC lamp may be illuminated as well.