Description And Operation
DESCRIPTION
The Electric Power Steering (EPS) Module is mounted to the underside of the EPS steering column.
OPERATION
Turning of the steering wheel is converted into linear (side-to-side) travel through the meshing of the helical pinion teeth with the rack teeth within the steering gear. The lateral travel pushes and pulls the tie rods to change the direction of the vehicle's front wheels.
Power assist steering is provided by an electric motor connected to the steering column. The EPS system provides variable assist for steering maneuvers based on several inputs, including vehicle speed, Steering Angle Sensor (SAS), and vehicle voltage.
The EPS system communicates over the Controller Area Network (CAN)-CH bus. The steering angle sensor is internal to the EPS column and outputs the SAS position to other modules.
Manual steering control of the vehicle can be maintained if power steering assist is lost. However, under this condition, steering effort is significantly increased.
The EPS module is integral to the steering column. If replacement of the EPS module is necessary, the steering column must be replaced. Refer to COLUMN, REMOVAL AND INSTALLATION .