Steering: Description and Operation

The twin orifice power steering system uses a vehicle speed sensing electronic control design. Valve sensitivity is controlled in response to vehicle speed to achieve maximum steering effort.
When a vehicle speed signal is not entered into the control unit for about 10 seconds during normal operations, a fail safe system activates to maintain a steering effort similar to that of high speed operation. If a foot brake, parking brake or transmission position signal is not entered the steering system is held in a fail safe control state. This symptom is referred to as ``Heavy Steering During Stationary Turns.''