2005-2011 Honda FourTrax Foreman TRX500 FE/FPE/FM/FPM/TM Service Manual, Page 59Get this manual
TECHNICAL FEATURES
ELECTRIC POWER STEERING (EPS)
OUTLINE
The EPS model is equipped with an electric power steering (EPS) system, which has been designed to reduce the steering effort required of the ride rThe EPS system is composed of the EPS unit, crankshaft position sensor (CKP sensor), rear vehicle speed sensor (rear VS sensor), ECM and EPS ECUThe torque sensor senses the road resistance and the turning direction of the steering shaft and sends signal to the EPS ECUBased on this signal and the vehicle speed sensor signal the EPS EeU determines the required current and sends it to the EPS motorThen the motor turns to move the steering shaft right or left via the worm gear and worm wheelThus, the steering effort required by the rider is reduced