SsangYong Actyon Sports II. Service manual - part 166
13-11
4620-01
4) System Control
ECPS system, according to the vehicle speed,
enables to achieve proper steering
characteristics by controlling hydraulic
pressure to reaction plunger located in input
shaft of power steering gear box. In other words,
ECPS control unit enhances the parking
conveniences by controlling duty type current
control. It provides heavy steerability with low
current as the vehicle speed increases. And, it
provides light steerability with high current as the
vehicle speed decreases.
▶During parking and low speed driving
During parking and driving in low speed, the control unit supplies approx. 1 A of electric current to
solenoid valve. Then, the spool located in PCV compresses the upper spring and elevates upward and,
the working pressure from oil pump (A port) is not able to flow to the reaction plunger (C port). As a
result, the pressing force from reaction plunger disappears and the steerability enhances.