System outline

This is a system to assist the driver to steer the vehicle with easy steering force. Based on torque signal of steering from power steering torque sensor, and vehicle speed and other vehicle information from skid control ecu, power steering ecu calculates assisting current to control power steering motor.

Under the system in abnormality, power source relay and motor relay in power steering ecu is shut down and master warning lamp on combination meter blinks as well as p/s warning is indicated, resulting to stop the assistance.