XG 350 V6-3.5L (2002)
Electronic Power Steering Solenoid: Description and Operation
EPS SOLENOID
SOLENOID VALVE
A solenoid valve is provided in the gear box to control the flow of power steering oil. The solenoid valve is composed of a releasing spring, a piston
and a plunger. The input current is varying from 0A to 1A according to the vehicle speed and is controlled by EPS control module. When the ignition
switch is turned on, current is sent to the solenoid valve to push up the plunger and accordingly the piston contacting the plunger is Pushed up while
overcoming the spring force. As the vehicle speed increases, the current flow going into the solenoid decreases and the piston is pushed down by the
spring force. When the piston is pushed up, it closes the oil passing hole, and the power steering oil pressure is transferred into the cylinder without
any interruption. But when the hole is opened as the piston is going down, some of the oil coming from the rotary valve is drained into the reservoir
via the hole inside the rotary valve.
NOTE: When it is necessary to remove the EPS gear box, be sure to disconnect the connector to prevent damage.