Circuit Description

The variable effort steering (VES) system uses the speed sensitive power steering (SSPS) control module to control current to an electromagnetic rotary actuator. The SSPS control module commands current from 0.50 - 1.05 A to the actuator. At low speeds, approximately 1 A of current is commanded, which provides full power assist. At medium speeds, 0.78 - 0.90 A of current is commanded and moderate steering is provided. At high speeds, the SSPS control module will command a current between 0.50 - 0.77 A, which provides minimal steering assist. The lower the commanded current, the less power steering assist is provided.