Mazda 6. Manual — part 41

ABS/TCS

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OUTLINE

A6E692143000T01

•

The hydraulic pressure control mechanism in the ABS (ABS/TCS) hydraulic unit (HU) and the system control
strategy is essentially carried over from that of the current 323 (BJ), except for the following:
— Input/output terminals of ABS (ABS/TCS) HU/CM have been changed.
— CAN communication system has been adapted.
— The ABS (ABS/TCS) HU/CM outputs a speed signal to the audio unit, wiper and washer switch,

car-navigation unit, cruise actuator, and auto leveling control unit though a hard wire, and also outputs
speed signal through CAN.

— TCS indicator light is the same light as the DSC indicator light.

Structural View

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ABS/TCS

A6E6921T002

1

L.H.D.

2

R.H.D.

3

ABS wheel-speed sensor (front)

4

ABS sensor rotor (front)

5

ABS wheel-speed sensor (rear)

6

ABS sensor rotor (rear)

7

TCS OFF switch

8

Instrument cluster

9

ABS warning light

10

TCS indicator light

11

TCS OFF light

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ABS/TCS

System Diagram

.

End Of Sie

A6E6921T001

1

IG switch

2

SUS 15 A fuse

3

ABS 60 A fuse

4

Meter

5

ABS warning light

6

Brake system warning light

7

TCS OFF light

8

TCS indicator light (with TCS only)

9

CAN driver

10

Brake light

11

Cruise actuator

12

TCS OFF switch (with TCS only)

13

DLC-2

14

CAN-H

15

CAN-L

16

ABS Wheel-speed sensor

17

Battery

18

Brake switch

19

Audio unit, Wiper and washer switch, Car-navigation
unit, Auto leveling control unit

DYNAMIC STABILITY CONTROL

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OUTLINE

A6E692067650T01

•

The hydraulic pressure control mechanism in the DSC HU/CM and the system control strategy is essentially
carried over from that of the previous 323 (1704-1*-00J), except for the following:
— DSC unit and hydraulic unit has been integrated to improve service ability.
— Lateral-G sensor and yaw rate sensor has been integrated to improve serviceability.
— Brake fluid pressure sensor has integrated to DSC HU/CM.
— Input/output terminals of DSC HU/CM have been changed.
— Electrical brake assist function has been adapted to improve safety.
— DSC OFF switch has been adapted to cancel the DSC function.
— The DSC HU/CM outputs a speed signal to the audio unit, wiper and washer switch, car-navigation unit,

cruise actuator, and auto leveling control unit through a hard wire, and also outputs speed signal to the
CAN line.

— CAN communication system has been adapted.

Structural view

.

DYNAMIC STABILITY CONTROL

A6E6920T004

1

L.H.D.

2

R.H.D.

3

DSC HU/CM

4

Wheel-speed sensor (front)

5

Sensor rotor (front)

6

Wheel-speed sensor (rear)

7

Sensor rotor (rear)

8

DSC OFF switch

9

Instrument cluster

10

ABS warning light

11

DSC indicator light

12

DSC OFF light

13

Steering angle sensor

14

Combine sensor

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DYNAMIC STABILITY CONTROL

Components and Functions

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The DSC system consists of the following components. Moreover, the function of common components in
other systems as they are related to each DSC structural component is explained in terms of DSC system
functions.

Part name

Function

DSC HU/CM

•

Calculates input signal from each sensor, and controls brake fluid pressure
applied to each wheel, and activates each DSC system function (ABS, EBD,
TCS, and DSC).

•

Outputs control signal regulating the function of the TCS/DSC system and speed
signal through CAN.

•

Outputs speed signal to the audio unit, wiper and washer switch, car-navigation
unit, cruise actuator, and auto leveling control unit through a hard wire

•

Controls the diagnosis system and fail-safe function when an abnormality is
detected in the DSC system.

PCM

•

Controls engine torque based on the signal from DSC HU/CM.

•

Transmits engine conditions and tire information to DSC HU/CM through CAN.

DSC indicator light

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Notifies driver of DSC operation (Vehicle is in side slip situation).

•

Notifies driver of TCS operation (Drive-wheel slippage situation).

DSC OFF switch

•

DSC system non-operation based on driver intention is transmitted to DSC HU/
CM.

DSC OFF light

•

Notifies driver of DSC system non-operation by DSC OFF switch.

•

Notifies driver of DSC system is forbidden by fail-safe function.

Wheel speed sensor

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Detects rotation state of each wheel and transmits signal to the DSC HU/CM.

Combine sensor

•

Detects lateral-G force and yaw rate (vehicle cornering angle velocity) of vehicle
and transmits to DSC HU/CM.

Steering angle sensor

•

Detects steering angle and transmits to the DSC HU/CM.