What should be checked for during steering wheel adjustment testing when the wheel is not turned to either side?

During steering wheel adjustment testing, checking for straightness is critical as it ensures the steering wheel is properly aligned when the vehicle is moving in a straight line. A straight steering wheel indicates that the vehicle is tracking correctly and that the suspension and alignment settings are accurate. This is important for vehicle control and safety; if the steering wheel is off-center when the wheels are straight, it can lead to uneven tire wear and affect handling.

In this context, alignment could refer to the overall alignment of the vehicle's wheels rather than just the steering wheel itself. Responsiveness pertains to how quickly and accurately the steering reacts to driver input, which may be assessed during different scenarios or conditions while driving. Pressure typically relates to tire pressure rather than steering mechanism checks. Thus, assessing the straightness of the steering wheel provides a direct indication of proper steering adjustment and alignment.