The steering angle sensor is usually installed in the column below the steering wheel and is connected to the vehicle's electronic control unit (PCM) via the CAN bus. When we calibrate the steering angle sensor, we need to connect the vehicle's OBD2 port or special diagnostic port with a car diagnostic tool.
For Autel OBD2 diagnostic scanners, steering angle sensor calibration is part of the maintenance function. Both Autel handheld code reader scanners and flatbed scanners can be connected to the OBD2 interface to use this function, but not all scanners support this function. For example, Autel AL619 does not involve car maintenance related functions.
Steering Angle Sensor (SAS) is a device used to detect the steering wheel rotation angle and direction, commonly known as steering wheel angle sensor.
It plays an important role in advanced automotive technologies such as electronic stability program (ESP), adaptive front lighting system (AFS), electric power steering (EPS), automatic driving system (ADAS) and lane departure warning system (MPC).
Application of steering angle sensor in car
When the steering angle sensor cannot accurately detect the steering wheel turning angle, it may cause inaccurate vehicle steering, affecting driving safety and handling performance.
For example, the steering wheel is turned to a certain angle, but the actual steering angle of the vehicle is not consistent with the expected one. In this case, calibration is required to ensure that the sensor can work properly and restore the precise control of the vehicle.
Steering angle sensor fault light
The new sensor and steering wheel need to be adapted and calibrated with the vehicle's electronic control system.This is similar to the need for a new key to match the vehicle's lock system.
The new sensor needs to be calibrated so that the electronic control system can recognize it and establish a correct communication relationship with it to ensure the precise operation of the steering system.
After wheel alignment or track adjustment, the geometric parameters of the vehicle's suspension and steering systems will change. If the steering angle sensor is not calibrated, the steering angle may be inaccurate, affecting the vehicle's handling and stability.
Step 1:Before manual calibration, first make sure the vehicle is parked on flat ground to avoid errors caused by tilted ground.Make sure the steering wheel is in the straight ahead position, i.e. the steering angle is zero.
Step 2:Connect the Autel diagnostic scanner to the vehicle's diagnostic port and read the sensor's current status and deviation value through dedicated software.
Step 3:Follow the diagnostic scanner prompts and perform the calibration procedure. This usually involves resetting the steering angle sensor by turning the steering wheel and letting the ECU register the new sensor reading.
Step 4:After completing the correction, restart the vehicle and test the response of the steering wheel. Check whether the steering system has returned to normal and ensure that there is no abnormal steering deviation during driving.
Note:Throughout the process, follow the manufacturer's recommendations and steps to ensure the accuracy and safety of the calibration.
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Shop NowIf your SAS system is abnormal, you must calibrate it in time, because it will affect your driving safety. If you cannot calibrate it yourself using the diagnostic scanner tool, please seek help from a professional. Regularly calibrating the steering angle sensor is beneficial to improving driving stability, steering accuracy and preventing failures.
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