Speed-Sensitive Steering (SSS)

Speed-Sensitive Steering (SSS) system, increases steering effort as vehicle speed increases, resulting in a firmer steering feel (road feel) and improved directional stability. System increases steering effort by decreasing amount of power steering fluid pressure applied to the steering gear. As a safety feature, system allows full power steering assist during sudden turns, such as in an evasive maneuver.

RSS control module cycles SSS solenoid valve on and off based on vehicle speed input from Powertrain Control Module (PCM), and steering angle input from steering position sensor. When SSS solenoid valve is off (de-energized), full pump pressure is allowed to flow through high-pressure line, increasing fluid pressure to steering gear. When SSS solenoid valve is on (energized), fluid by-passes pressure line outlet and is routed back into pump, decreasing fluid pressure to steering gear.