How to calibrate steering angle sensor (SAS)

The definition of steering angle sensor

SAS, steering angle sensor is a significant element of the ESC system which control the steering wheel position angle and rate of turn. To keep it easy, the steering in a car or other vehicle is the mechanical parts of it which make it possible to steer. The SAS is located in a sensor cluster in the steering column. The cluster normally is compatible with more than one steering position sensor for confirming data. The ESC module has to receive two signals to confirm the steering wheel position. These signals are often out of phase with each other.

The importance of steering angle sensor

If the SAS is out of calibration, most vehicles can tell if they are traveling in a straight line, but if the angle is too far off, the ESC could become disabled.

The Category of steering angle sensor

1) Analog Steering Sensors
2) Digital Steering Position Sensor
3) CAN Bus Module Steering Angle Sensors
4) Testing Direct-Type CAN SAS Sensors

How to calibrate steering angle sensor

1) Self-Calibration:
Some newer vehicles can auto calibrate by having the wheel turned from lock to lock and then centered and cycling the key.

Step 1 Turn the steering wheel first as far as it will go anticlockwise and then as far as it will go clockwise
Step 2 Turn off the engine and remove the key from the ignition
Step 3 Remove driver side wheel, stop and pack vehicle
Step 4 Turn off ignition, remove key, wait 10 seconds
Step 5 Start engine, confirm normal Active Steering operation

2) Scan Tool Steering Angle Sensor Reset
There are many options for OBD2 tools to reset SASs. Some tools can even configure the size of tires. But, most tools recommend that the calibration be performed on a level surface. Multidiag Access J2534 is able to reset steering angle sensor for multi brand vehicle makes. There are also some specific options for specific vehicle makes, like WiTech VCI is great for Chrysler vehicles and BMW INPA K+CAN diagnostic system works great for BMW vehicles.

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