Electronic Stability Control
(ESC) Electronic Stability Control utilizes onboard computers to monitor vehicle direction and stability.
The control module uses input sensors to monitor vehicle steering and direction continuously. These sensors include four wheel speed sensors, the vehicle speed sensor, and a few other directional and speed inputs. It estimates the direction of the skid and applies different brake units to regain stability and control. It uses several other input sensors including the:
Steering Wheel Position Sensor: The steering wheel position sensor informs the control module of the driver's intended direction. It takes this information and compares it to the vehicle's actual direction to make an informed braking decision. These decisions are based on factory-set parameters. The sensor is located on the steering shaft and looks like a small clock spring.
Yaw Rate Sensor: TThis sensor is located somewhere in the passenger's compartment under the center console or front seat. Its purpose is to sense when a vehicle is beginning to fishtail and spin sideways.
Lateral Acceleration Sensor: This is known as the G-sensor. It's capable of sensing the speed and force the vehicle has while entering a turn. Note that the Yaw Rate and Steering Wheel Position sensors are often combined into a single unit.