Mazda Training manual - part 98

Dynamic Driving Safety Systems 

DSC 

Hydraulic Diagram 

 

 

L2003_02029 

 

1 

Master cylinder 

9 

Brake calliper RR 

2 

DSC HU/CM 

10 

Brake calliper LR 

3 

Traction control solenoid valve 

11 

Brake calliper RF 

4 

Stability control solenoid valve 12 

Damper 

chamber 

5 

Inlet solenoid valve 

13 

Pump motor 

6 

Flow control valve 

14 

Reservoir 

7 

Outlet solenoid valve 

15 

Pump 

8 

Brake calliper LF 

16 

Brake fluid pressure sensor 

 
 

Curriculum Training 

02-51 

DSC 

Dynamic Driving Safety Systems 

Operation 

• 

The operation of the standard brake system, the ABS, and the TCS has already been 
explained on the previous pages. Therefore, only the operation of the DSC is explained 
on the following pages. 

• 

DSC permanently compares vehicle speed, wheel speed, steering angle, yaw rate, and 
lateral acceleration with each other and with stored values. If they do not match up (e.g. 
yaw rate indicates that the vehicle is turning to the left while steering angle indicates that 
the driver wants to make a turn to the right) the DSC starts operation according to a 
stored map data and internal calculations. 

• 

According to its calculations, the DSC reduces engine torque and/or applies a specified 
amount of brake force to single wheels, in order to counteract unwanted forces (e.g. yaw 
moment against the driving direction). Due to this, the DSC can correct an unstable 
driving condition especially during emergency manoeuvres. 

• 

When e.g. a vehicle tends to oversteer during cornering, the vehicle’s tail slides towards 
the outside, the vehicle becomes unstable and the driver loses control.  

 

 

L2003_02030 

 

1 

Actual direction of travel 

2 

Intended direction of travel 

 
 

02-52 Curriculum 

Training 

Dynamic Driving Safety Systems 

DSC 

• 

The DSC counteracts this tendency by applying brake force to one or more wheels (in 
this case to the outside front wheel). Due to the brake force, a momentum is built up, 
counteracting the unintentionally movement of the vehicle, as shown in the illustration 
below: 

 

 

L2003_02031 

 

1 

Direction of travel without DSC 
intervention 

3 

Brake force applied 

2 

Direction of travel with DSC intervention 

4 

Counteracting yaw moment 

 
 

Curriculum Training 

02-53 

DSC 

Dynamic Driving Safety Systems 

• 

When a vehicle tends to understeer during cornering, the vehicle’s circular path is of 
larger diameter than the circle indicated by the direction its wheels are pointed. The 
vehicle does not turn as tightly as it should and leaves its track instead of following the 
intended path.  

 

 

L2003_02032 

 

1 

Intended direction of travel  

2 

Actual direction of travel 

 
 

02-54 Curriculum 

Training