Integrated sensor mounted on the left side of the parking brake lever (left hand drive models) or on the right side of the parking brake lever (right hand drive models) and determines the yaw rate of the car (cornering speed of a car) and longitudinal acceleration. The sensor sends a signal to the DSC HU/CM system.
Combined sensor output voltage 2.5V when vehicle is stationary) varies in accordance with the yaw rate and the magnitude of the longitudinal acceleration.
The yaw rate is determined when the sensor detects a Coriolis force that is proportional to the rotation speed.
The magnitude of the longitudinal acceleration is determined when the sensor detects an inertial force proportional to the longitudinal acceleration acting on the silicon sensing element.
Note.
Coriolis force. When an object on a rotating disk moves towards its center, a force is generated at right angles to the object's path. This causes the direction of movement of the object to remain unchanged relative to the point of origin, and the object does not reach the center. This force that deviates the object from the center is called the Coriolis force, and the actual movement of the object is rectilinear.
Pic. 6.3. Wiring diagram of the ABS / TCS system of the brake circuit of the Mazda 3: 1 - switch IG; 2 - SUS 10 a (fuse); 3 - anti-lock braking system 20 a and 30 a (fuses); 4 – a combination of devices; 5 – a lamp of the alarm system of antiblocking system of brakes; 6 – a lamp of the alarm system of brake system; 7 – CAN driver; 8 - the actuator of the automatic speed control system; 9 - ABS system control unit; 10 - wheel speed sensors of the anti-lock braking system; 11 - battery
Pic. 6.4. Scheme of operation of the DSC HU / CM system of the Mazda 3 PCM unit: 1 – wheel speed sensor; 2 – sensor rotor; 3 – rotation angle sensor; 4 – a control lamp of the DSC system; 5 – a control lamp of shutdown of the DSC system; 6 – a lamp of the alarm system of brake system; 7 – a lamp of the alarm system of antiblocking system of brakes; 8 - combined sensor; 9 - audio unit, wiper and washer, automatic speed control system actuator, windshield washer switch, car navigation and alignment control unit; 10 - main cylinder; 11 - electrical signal; 12 - brake fluid; 13 - CAN line
Pic. 6.5. Wiring diagram of the Mazda 3 brake circuit DSC system: 1 - switch IG; 2 - SUS 10 a (fuse); 3 - anti-lock braking system 20 a and 30 a (fuses); 4 – a combination of devices; 5 – a lamp of the alarm system of antiblocking system of brakes; 6 – a lamp of the alarm system of brake system; 7 – CAN driver; 8 - the actuator of the automatic speed control system; 9 - control unit of the DSC system; 10 - wheel speed sensors of the anti-lock braking system; 11 - battery; 12 - steering wheel angle sensor; 13 - combined sensor of the CAN controller; 14 - DSC system switch; 15 – a control lamp of shutdown of the DSC system; 16 - control lamp DSC