Mazda 2007 CX-9, Service Highlights

Page: 204 / 614

DYNAMIC STABILITY CONTROL/ROLL STABILITY CONTROL
04-18–16
DSC/RSC CM PART FUNCTION
id041800818300
•
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.
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