2013 SSANGYONG NEW ACTYON SPORTS Service Manual

13-74620-01
SSPS warning lamp
Comes on when SSPS system has a fault
Power steering supply hose and return hose for
SSPS model
Power steering pump with SSPS
Installed view Pump components

13-8
3. HOW TO OPERATE
1) Input/Output of SSPS Control Unit
Meter Cluster
(Vehicle Speed)SSPS
Control
Unit
Solenoid Valve
Meter cluster
(SSPS warning lamp)
Trouble Diagnosis
2) SSPS Configuration
Ground IG Power

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▶Components
PCV (Pressure Control Valve)
This valve controls the hydraulic pressure supplied to reaction device by moving the spool valve
according to the changes of solenoid valve.
Reaction device
This device increases the steerability effect by binding the input shaft with supplied hydraulic pressure
from PCV.
Solenoid valve
This valve determines the valve spool position in PCV with the electric current supplied from ECPS
control unit. 1.
2.
3.
3) Operation of Solenoid Valve
SSPS control unit controls the current to solenoid valve according to the vehicle speed. Based on this
current, the solenoid valve changes the position of valve spool to control the hydraulic pressure to the
reaction plunger. Accordingly, the SSPS system can get the desired steering force according to the
vehicle speed.
▶During parking and low speed driving
SSPS control unit outputs nearly maximum electrical current.
The solenoid rod pushes PCV spool to right side.
The hydraulic pressure coming from pump is not supplied to the reaction device as the spool
orifice is cut off.
The hydraulic pressure is cut off and the manipulation of steering wheel becomes lighter. 1.
2.
3.
4.

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▶ In medium and high speed driving
The shaft operation force of solenoid rod is reduced due to the reduction of output current from SSPS
control unit.
The coil spring pulls the PCV spool toward solenoid valve to open it.
The hydraulic pressure from pump flows to pinion reaction area through orifice and applies reaction
force to reaction plunger.
At this time, the reaction plunger transmits the reaction force to V-groove in input shaft to provide heavy
steerability. 1.
2.
3.
4.

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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.

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▶During high speed driving
During high speed driving, the control unit supplies weak electric current to solenoid valve. Then, the
spool located PCV moves from top to bottom, and the working pressure (A port) from oil pump is applied
to reaction plunger (C port ) through B port. As a result, the pressing force from reaction plunger against
input shaft is increased and the steerability becomes heavier.

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4. S.S.P.S (SPEED SENSITIVE POWER STEERING)

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1. SPECIFICATIONS
2. MAJOR CHANGES
Wheel assembly
16-inches silver 18-inches silver 18-inches hyper silver
PN: 41730-32000 PN: 41730-32200 PN: 41730-32300
- Added 18-inches hyper silver to wheel assembly
- Wheel offset and tire size are identical with existing specifications
Existing specifications New specifications
Description Specification
Tire 16 inch 225/75R 16
18 inch 255/60R 18
Tire inflation pressure Front: 32 psi
Rear: 32 psi (44 psi: when the vehicle is fully laden
with luggage)
Wheel 16 inch 6.5J x 16
18 inch 7.5J x 18
Balance weight 16 inch Inner: Attachment type
Outer: Clip type
18 inch Inner: Attachment type
Outer: Attachment type
Tightening torquse of wheel bolt 127.4 ~ 156.8 Nm