Mazda Training manual - part 79

Dynamic Driving Safety Systems 

Table of Contents 

Introduction.................................................................................................................00-1 
Fundamentals .............................................................................................................01-1 

Forces Acting on the Vehicle.................................................................................01-2 

Yaw Moment...................................................................................................01-3 
Longitudinal Force ..........................................................................................01-3 
Lateral Force ..................................................................................................01-3 
Vertical Force .................................................................................................01-3 

Coefficient of Friction.............................................................................................01-4 
Wheel Slip .............................................................................................................01-6 
Kamm’s Circle .......................................................................................................01-8 
Antilock Brake System.........................................................................................01-10 
Electronic Brakeforce Distribution .......................................................................01-12 
Traction Control System ......................................................................................01-15 
Dynamic Stability Control ....................................................................................01-17 
Emergency Brake Assist .....................................................................................01-19 
 

Antilock Brake System...............................................................................................02-1 

Parts Location........................................................................................................02-1 
Hydraulic Unit / Control Module.............................................................................02-2 

Wiring Diagram...............................................................................................02-4 

Layout....................................................................................................................02-5 
Hydraulic Circuit ....................................................................................................02-5 

Hydraulic Diagram ..........................................................................................02-6 

Operation...............................................................................................................02-6 

During Normal Braking ...................................................................................02-7 
During ABS Control ........................................................................................02-8 
Pressure Hold Mode.......................................................................................02-8 
Pressure Reduction Mode ............................................................................02-10 
Pressure Increase Mode ..............................................................................02-11 

Servicing..............................................................................................................02-12 

Bleeding........................................................................................................02-12 
Diagnostics ...................................................................................................02-14 
Replacement ................................................................................................02-14 

Wheel Speed Sensor...........................................................................................02-15 
Passive Wheel Speed Sensor .............................................................................02-16 

Diagnostics ...................................................................................................02-17 
Checking the Air Gap ...................................................................................02-18 

Active Wheel Speed Sensor................................................................................02-19 

Diagnostics ...................................................................................................02-20 

Brake Switch........................................................................................................02-21 

Diagnostics ...................................................................................................02-22 

ABS Warning Light ..............................................................................................02-22 

Diagnostics ...................................................................................................02-24 

 

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Dynamic Driving Safety Systems 

ABS on Vehicles with 4WD......................................................................................02-25 

G-Sensor .............................................................................................................02-25 

Diagnostics ...................................................................................................02-26 
Replacement ................................................................................................02-26 

 

Electronic Brakeforce Distribution .........................................................................02-27 

Brake System Warning Light ...............................................................................02-29 

Diagnostics ...................................................................................................02-30 

 

Traction Control System..........................................................................................02-31 

TCS Control Module ............................................................................................02-32 

Wiring Diagram.............................................................................................02-32 

Hydraulic Circuit ..................................................................................................02-33 

Hydraulic Diagram ........................................................................................02-34 

During TCS Control .............................................................................................02-35 

Pressure Increase Mode ..............................................................................02-36 
Pressure Hold Mode.....................................................................................02-38 
Pressure Reduction Mode ............................................................................02-40 
Bleeding........................................................................................................02-42 
Diagnostics ...................................................................................................02-42 

TCS Indicator Light..............................................................................................02-43 

Diagnostics ...................................................................................................02-43 

TCS OFF Indicator Light......................................................................................02-44 

Diagnostics ...................................................................................................02-44 

TCS OFF Switch..................................................................................................02-45 

Diagnostics ...................................................................................................02-45 

 

TCS on Vehicles with 4WD ......................................................................................02-46 

 

 Curriculum 

Training 

Dynamic Driving Safety Systems 

Table of Contents 

Dynamic Stability Control........................................................................................02-46 

Parts Location......................................................................................................02-47 
Wiring Diagram....................................................................................................02-48 
Hydraulic Circuit ..................................................................................................02-50 
Hydraulic Diagram ...............................................................................................02-51 

Operation......................................................................................................02-52 

During DSC Control.............................................................................................02-55 

Pressure Increase Mode ..............................................................................02-56 
Pressure Hold Mode.....................................................................................02-58 
Pressure Reduction Mode ............................................................................02-60 
Bleeding........................................................................................................02-62 
Diagnostics ...................................................................................................02-63 

Combined Sensor................................................................................................02-64 

Diagnostics ...................................................................................................02-65 
Replacement ................................................................................................02-65 

Steering Angle Sensor.........................................................................................02-65 

Diagnostics ...................................................................................................02-67 
Replacement ................................................................................................02-67 

Brake Fluid Pressure Sensor...............................................................................02-67 

Diagnostics ...................................................................................................02-68 
Replacement ................................................................................................02-68 

DSC Indicator Light .............................................................................................02-68 

Diagnostics ...................................................................................................02-69 

DSC OFF Indicator Light .....................................................................................02-70 

Diagnostics ...................................................................................................02-71 

DSC OFF Switch .................................................................................................02-71 

Diagnostics ...................................................................................................02-72 

 

Emergency Brake Assist .........................................................................................02-73 

Electronic EBA.....................................................................................................02-73 
Mechanical EBA ..................................................................................................02-74 

Overview.......................................................................................................02-75 
Operation......................................................................................................02-76 
Normal Braking.............................................................................................02-77 
Emergency Braking ......................................................................................02-78 
 

List of Abbreviations................................................................................................03-01 

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Table of Contents 

Dynamic Driving Safety Systems 

Notes: 

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Training