Bad ACSD switch and Steering Angle Sensor

Now, here's a question: my vehicle listed above is not throwing a check engine light on the dashboard. The shop installed a new clockspring and after that, while driving, I felt a pulsating/vibrating effect on the pedals on certain condition like turning my steering at certain speeds and will throw a VDC/SLIP indicator on the dashboard. They inspected more and found out that when they turn the steering wheel there is no steering angle value that their scanner is reading (meaning it stays at zero degrees when they turn the steering in any direction). They said the Steering Angle Sensor is good and the clockspring is good, but the ACSD switch is bad. No check engine light; just pulsating/vibrating on pedals due to no data from steering angle sensor and throwing a VDC/SLIP light on dashboard and it comes down to the ACSD switch? I asked the mechanic who did the work what the ACSD switch do and said it should provide data to the ECM on the Steering Angle and once the ACSD switch is fixed that pulsating effect will go away. I just found out today before this video that ACSD is about the cruise control switch in the steering wheel, but he didn't mention anything about cruise control. How is the ACSD cruise control switch connected to the Steering Angle Sensor? And why would it not send data to the ECM if the ACSD is the one that's bad? Or my gut feeling is right that the shop is pulling my leg? The good thing though is the clockspring turned off the blinking airbag light which is why it came to this clockspring replacement and the pulsating issue.