DSC/RSC CM PART FUNCTION

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• The dynamic stability control (DSC)/roll stability control (RSC) control module (CM) makes calculations using signals input from each sensor, outputs a brake fluid pressure control signal to the DSC/RSC hydraulic unit (HU) to actuate DSC/RSC system functions and outputs an engine output control signal to the PCM.

• The DSC/RSC HU/CM controls the following functions:

Function Table

Function name

Contents

Antilock Brake System (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.

Traction Control System (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.

RSC control function

•  Suppresses vehicle attitude due to overspeed during evasive steering or cornering by controlling engine speed and wheel braking to improve vehicle stability during cornering.

Brake assist function

•  Controls the fluid of the wheel cylinder during emergency braking, provides increased fluid pressure to each wheels.

CAN signal function

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

On-board diagnostic system

•  A function that allows important parts of the DSC/RSC 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/RSC 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
Antilock Brake System (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.
Traction Control System (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.
RSC control function	• Suppresses vehicle attitude due to overspeed during evasive steering or cornering by controlling engine speed and wheel braking to improve vehicle stability during cornering.
Brake assist function	• Controls the fluid of the wheel cylinder during emergency braking, provides increased fluid pressure to each wheels.
CAN signal function	• Transmits the wheel speed signal to the PCM using CAN communication.
On-board diagnostic system	• A function that allows important parts of the DSC/RSC 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/RSC 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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