DSC CM PART FUNCTION

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• The DSC CM makes calculations using signals input from each sensor, outputs a brake fluid pressure control signal to the DSC HU to actuate DSC system functions and outputs an engine output control signal to the PCM.

• The DSC HU/CM controls the following functions:

Function Table

Function name

Contents

ABS control function

•  Controls brake fluid pressure when braking to maintain directional stability, ensure steerability and reduce stopping distance.

Electronic brakeforce distribution (EBD) control function

•  Constantly controls proper distribution of brake fluid pressure to the front and rear wheels according to vehicle load, road surface and vehicle speed conditions to prevent early lock-up of the rear wheels.

TCS control function

•  Controls traction to within the road surface friction limit and according to road and driving conditions to improve starting and acceleration performance, and safety.

DSC control function

•  Suppresses strong over-steer and under-steer tendencies when turning by controlling engine output and braking of each wheel to assure driving safety.

CAN communication function

•  Outputs the vehicle speed signal and DSC system warning control data via CAN lines.

On-board diagnostic system

•  A function that allows important parts of the DSC control system to perform self-diagnosis. In case a malfunction occurs, the warning lights illuminate to alert the driver, and at the same time a DTC is stored in the DSC HU/CM.

•  When a malfunction is determined as a result of the on-board diagnostic test, system control is suspended or limited to prevent any dangerous situation while driving.

Automatic configuration function

•  When the ignition switch is turned to the ON position or the engine is started after the DSC HU/CM or DSC CM has been replaced, the DSC CM reads data from the instrument cluster via CAN communication to perform automatic configuration.

Function name	Contents
ABS control function	• Controls brake fluid pressure when braking to maintain directional stability, ensure steerability and reduce stopping distance.
Electronic brakeforce distribution (EBD) control function	• Constantly controls proper distribution of brake fluid pressure to the front and rear wheels according to vehicle load, road surface and vehicle speed conditions to prevent early lock-up of the rear wheels.
TCS control function	• Controls traction to within the road surface friction limit and according to road and driving conditions to improve starting and acceleration performance, and safety.
DSC control function	• Suppresses strong over-steer and under-steer tendencies when turning by controlling engine output and braking of each wheel to assure driving safety.
CAN communication function	• Outputs the vehicle speed signal and DSC system warning control data via CAN lines.
On-board diagnostic system	• A function that allows important parts of the DSC control system to perform self-diagnosis. In case a malfunction occurs, the warning lights illuminate to alert the driver, and at the same time a DTC is stored in the DSC HU/CM. • When a malfunction is determined as a result of the on-board diagnostic test, system control is suspended or limited to prevent any dangerous situation while driving.
Automatic configuration function	• When the ignition switch is turned to the ON position or the engine is started after the DSC HU/CM or DSC CM has been replaced, the DSC CM reads data from the instrument cluster via CAN communication to perform automatic configuration.

Block Diagram

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