The DSC HU/CM calculates the input signals from all sensors and controls the solenoid valve and pump motor (on/off), regulates the pressure of the working fluid in the brake cylinders and activates the functions of the dynamic stability system (ABS, electronic brake force distribution systems (EBD), TCS, DSC and Brake Assist).
The design and operation of the DSC hydraulic unit is similar to that of the modern Model 323 hydraulic unit (BJ), except for the operation of the emergency brake booster.
The DSC HU/CM outputs the engine torque control signal and the vehicle speed signal via the CAN link.
The DSC HU/CM also outputs the vehicle speed signal by wire.
Pic. 6.6. Scheme of operation of the combined dynamic stability control sensor of the Mazda 3 car: 1 - appearance; 2 - the front of the car; 3 – output voltage; 4 - acceleration; 5 - left turn; 6 - longitudinal acceleration; 7 - right turn; 8 - output voltage; 9 - left turn; 10 – yaw rate; 11 - right turn