2009 Cadillac STS-V Owner's Manual - Page 301

During some operating conditions, the active steering might deactivate to protect the system from damage. You might notice that the center position of the steering wheel is changed. Unless there is a SERVICE STEERING SYS message, the system will return to normal operation as soon as the condition ceases, usually within a very short period of time. At low speeds, the active steering system requires less movement of the steering wheel to change vehicle direction than the normal power steering system. Adjust your driving accordingly. When certain steering faults are present, the active steering deactivates and vehicle speed might be limited. The SERVICE STEERING SYS and SPEED LIMITED TO XXX messages will be displayed. See DIC Warnings and Messages on page 3-79. The normal power steering system is still operational. You might notice that the center position of the steering wheel is changed and that more steering effort at low speeds and less steering effort at high speeds is required. You can continue to drive your vehicle with normal power steering but you should have your dealer/retailer inspect the steering system as soon as possible in order to have the problem corrected and the steering wheel position centered. When stability control activates, the system automatically adjusts the front road wheel steering angle, modifies the suspension stiffness, and selectively applies braking pressure at any one of the vehicle's brakes to help maintain directional control of the vehicle. Adjustments to the steering will not be felt in the steering wheel. See Enhanced StabiliTrak® on page 4-6. It is recommended that the battery not be disconnected when the steering wheel is turned from the center position. If this occurs, the center position of the steering wheel could be temporarily changed a small amount. You can continue to operate your vehicle and, after a short time, the center position of the steering wheel will return to normal. Steering Tips It is important to take curves at a reasonable speed. Traction in a curve depends on the condition of the tires and the road surface, the angle at which the curve is banked, and your speed. While in a curve, speed is the one factor you can control. If you need to reduce speed, do it before you enter the curve, while the front wheels are straight ahead. Try to adjust the speed so you can drive through the curve. Maintain a reasonable, steady speed. Wait to accelerate until you are out of the curve, and then accelerate gently into the straightaway. 4-13