A bad collapsible steering column will not look any different from a good one. In a bad sensor the internal components are blown/damaged and the sensor needs to be replaced.
The only way to know if yours is good or bad is to pull the codes to see if you get the code for a collapsible steering column. Usually the code is B0005 – Collapsible Steering Column Deployment Control.
We provide service to rebuild collapsible steering column sensors. more info