The normal operation for this feature to slow the unit down to different speeds when the platform is raised, and the steering wheel is turned more than 10 degrees.
A common complaint from operators is that the picker travel speed will be reduces significantly when turning even when the platform is lowered all the way. There are a few causes for this issue with the most common being the platform height switches located on the lower front of the platform.
This message is an indication to the operator that a speed limiting condition due to a combination of steering angle and height is in effect.
If the platform height is between 24 or 60 inches and the steer angle is greater than 10 degrees, the max speed will be limited to 2.5 mph.
If the platform height is between 60 and 150 inches and the steering angle is greater than 10 degrees, the max travel speed will be limited to 1 mph.
If the platform height is greater than 150 inches and the steer angle is greater than 10 degrees, travel is prohibited.
There are a few codes that can accompany this warning, but from experience the most common fix is to replace the mast switches or the levers that activate the switches.