Mazda Training manual - part 95

Dynamic Driving Safety Systems 

TCS 

 

 

L2003_02022 

 

1 

Master cylinder 

7 

Inlet solenoid valve 

2 

ABS/TCS HU/CM 

8 

Outlet solenoid valve 

3 

Damper chamber 

9 

Brake calliper LR 

4 

Pump motor 

10 

Brake calliper RF 

5 

Pump 

11 

Traction control solenoid valve RF/LR 

6 Reservoir 

  

 

Curriculum Training 

02-39 

TCS 

Dynamic Driving Safety Systems 

Pressure Reduction Mode 

• 

When the CM detects that wheel speed is less than appropriate for the vehicle speed, it 
reduces the brake force applied to the wheel by opening the outlet solenoid valve and 
activating the pump. The brake fluid pressure is thereby reduced and the wheel speed 
increases. 

• 

If the wheel speed increases too much, more than a specified limit above the vehicle 
speed, the TCS operation starts again from the pressure increase mode 

 

LF-RR

OFF (open)

RF-LR

ON (closed)

LF

OFF (open)

RF

ON (closed)

LR

ON (closed)

RR

OFF (open)

LF

OFF (closed)

RF

ON (closed)

LR

OFF (closed)

RR

OFF (closed)

Pump motor

ON (operating)

L2003_T02011

Traction control solenoid valve

Inlet solenoid valve

Outlet solenoid valve

 

 
 
 

02-40 Curriculum 

Training 

Dynamic Driving Safety Systems 

TCS 

 

 

L2003_02023 

 

1 

Master cylinder 

7 

Inlet solenoid valve 

2 

ABS/TCS HU/CM 

8 

Outlet solenoid valve 

3 

Damper chamber 

9 

Brake calliper LR 

4 

Pump motor 

10 

Brake calliper RF 

5 

Pump 

11 

Traction control solenoid valve RF/LR 

6 Reservoir 

  

 

Curriculum Training 

02-41 

TCS 

Dynamic Driving Safety Systems 

Bleeding 

NOTE:  In most cases it is not necessary to bleed the HU with the aid of the M-MDS during 

exchange of the brake fluid. Always follow the procedure of the corresponding W/M.  

 
• 

The bleeding procedure for a HU with TCS is similar to that for a vehicle with ABS. 

 
NOTE:  Always perform the manual bleeding procedure before performing any bleeding 

procedure with the aid of the M-MDS 

 

Diagnostics 

• 

Due to the fact that the TCS is incorporated to the ABS HU/CM, the system can be 
inspected together with the ABS HU/CM and the related components, and by monitoring 
the following additional PIDs: 

 

PID

Definition Unit/Conditi

LF_TCS_WV

LF traction control solenoid valve

ON/OFF

RF_TCS_WV RF traction control solenoid valve

ON/OFF

TCSOUTD

Torque reduction request signal

%

TPI

Throttle position status

%

L2003_T02013

on 

 

 

02-42 Curriculum 

Training