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.

EBD (Electronic Brakeforce Distribution) 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.

Vehicle speed output function

•  Outputs the value calculated using the ABS wheel-speed sensor signals as vehicle speed signal to the audio unit, car-navigation unit, position memory control module, auto light/wiper control module, climate control unit and the auto leveling control module.

•  Transmits the wheel speed signal to the PCM using CAN communication.

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 diagnosis test, system control is suspended or limited to prevent any dangerous situation while driving.

Function name	Contents
ABS control function	• Controls brake fluid pressure when braking to maintain directional stability, ensure steerability and reduce stopping distance.
EBD (Electronic Brakeforce Distribution) 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.
Vehicle speed output function	• Outputs the value calculated using the ABS wheel-speed sensor signals as vehicle speed signal to the audio unit, car-navigation unit, position memory control module, auto light/wiper control module, climate control unit and the auto leveling control module. • Transmits the wheel speed signal to the PCM using CAN communication.
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 diagnosis test, system control is suspended or limited to prevent any dangerous situation while driving.

Block Diagram

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