Mazda 2007 CX-9, Service Highlights, Page: 213 / 614

DYNAMIC STABILITY CONTROL/ROLL STABILITY CONTROL
04-18–25
04-18
RSC CONTROL OUTLINE
id041800819300
•
The dynamic stability control (DSC)/roll stability control (RSC) system monitors the signal from the roll rate
sensor and each sensor, and calculates if the vehicle may be approaching a situation where rollover is
probable. When this occurs, the DSC/RSC system applies preemptive action. When the DSC/RSC system is
activated, it adjusts the braking force of specific wheels in response to the direct measurement of the vehicle
roll motion. By adjusting the brake force, the DSC/RSC system can reduce cornering forces, reducing the total
roll moment acting on the vehicle. The DSC/RSC system has the roll rate sensor located within the combined
sensor and an additional program within the DSC/RSC control module (CM) to support the vehicle control
during sudden steering operation. Information from the roll rate sensor is input into the DSC/RSC CM. The
computer uses information from the antilock brake system (ABS) wheel-speed sensor (wheel speed), throttle
position sensor (throttle valve opening angle), steering angle sensor (steering wheel angle, steering wheel rate
of change), and combined sensor (longitudinal-G, lateral-G, yaw rate, roll rate). If the DSC/RSC CM determines
from all these inputs that conditions exist for a potential rollover, the CM applies one or more brakes and
reduces the engine torque to make the vehicle more stable.
End Of Sie
CONTROLLER AREA NETWORK (CAN) OUTLINE
id041800819500
•
The dynamic stability control (DSC)/roll stability control (RSC) hydraulic unit (HU)/control module (CM) sends
and receives data to and from other modules via the CAN system. Refer to Section 09 for a detailed
explanation of the controller area network (CAN) system.
Data sent
•
Brake system status
•
Wheel speeds of all four wheels
•
Torque reduction request
•
Desired coupling torque
Data received
•
Engine speed
•
Accelerator pedal position
•
Engine torque
•
Torque reduction disabled
•
Target gear position/selector lever position
•
Steering angle
•
Steering angle sensor status
•
Brake switch
•
Brake fluid level
•
Parking brake position
•
AWD system status
•
Coupling torque inhibit
End Of Sie
NG: FRONT ABS WHEEL-SPEED SENSOR
ABS WHEEL-SPEED SENSOR FUNCTION
id041800819600
•
The Antilock brake system (ABS) wheel-speed sensor detects and transmits the rotation condition of each
wheel to the dynamic stability control (DSC)/roll stability control (RSC) hydraulic unit (HU)/control module (CM).
•
The signal from the ABS wheel-speed sensors is the primary signal for DSC/RSC HU/CM control.
End Of Sie
3423-1U-06H(04-18).fm 25 ページ ２００６年１１月２２日 水曜日 午後２時３８分