Mazda RX-8 2004 - Operation; Dsc CM Part Function; Function Table

DYNAMIC STABILITY CONTROL
04–15–11
04–15
DSC CM PART FUNCTION
CHU041543750S04
• 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 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.