gas type SSANGYONG RODIUS 2005 Service Manual

07-7
ENGINE COOLING SYSTEM
RODIUS 2005.07
2110-01
3) COOLANT RESERVOIR
The coolant reservoir is a transparent plastic reservoir, similar to the windshield washer
reservoir.
The coolant reservoir is connected to the radiator by a hose and to the engine cooling system
by another hose. As the vehicle is driven, the engine coolant heats and expands. The portion o
f
the engine coolant displaced by this expansion flows from the radiator and the engine into the
coolant reservoir. The air trapped in the radiator and the engine is degassed into the coolant
reservoir.
When the engine stops, the engine coolant cools and contracts. The displaced engine coolant
is then drawn back into the radiator and the engine. This keeps the radiator filled with the
coolant to the desired level at all times and increases the cooling efficiency.
Maintain the coolant level between the MIN and MAX marks on the coolant reservoir when the
system is cold.
4) THERMOSTAT
A wax pellet-type thermostat controls the flow of the engine coolant through the engine cooling
system. The thermostat is mounted in the thermostat housing to the front of the cylinder head.
The thermostat stops the flow of the engine coolant from the engine to the radiator to provide
faster warm-up, and to regulate the coolant temperature. The thermostat remains closed while
the engine coolant is cold, preventing circulation of the engine coolant through the radiator.
At
this point, the engine coolant is allowed to circulate only throughout the heater core to warm it
quickly and evenly.
As the engine warms, the thermostat opens. This allows the engine coolant to flow through the
radiator where the heat is dissipated. This opening and closing of the thermostat permits
enough engine coolant to enter the radiator to keep the engine within proper engine
temperature operating limits.
The wax pellet in the thermostat is hermetically sealed in a metal case. The wax element of the
thermostat expands when it is heated and contracts when it is cooled.
As the vehicle is driven and the engine warms, the engine coolant temperature increases.
When the engine coolant reaches a specified temperature, the wax pellet element in the
thermostat expands and exerts pressure against the metal case, forcing the valve open. This
allows the engine coolant to flow through the engine cooling system and cool the engine.
As the wax pellet cools, the contraction allows a spring to close the valve.
The thermostat begins to open at 82°C (180°F) and is fully open at 95°C (203°F). The
thermostat closes at 80°C (176°F).

05-5
ENGINE EXHAUST SYSTEM
RODIUS 2005.07
2411-01
4. CATALYTIC CONVERTE STRUCTURE
The Catalytic converter of monolith type
consists of 2 walled metal bodies which is
made of Cordierite.
The principal element of converter consists
of the materials like Alumina or oxidized
Serume in order to apply to Ceramic
Monolith.
Washer coat operates first, and catalytic
metal elements (Pt, Pd, Rh) operates to
washer coat next.
Monolith type is lighter than other types,
easy to manufacture and quickly approaches
to proper temperature.
Washer coat is used to make a contact
surface with exhaust gas bigger by adhering
closely to small holes of inner layer.
If a lead compound or phosphorus adheres
to the surface and the temperature rises, its
surface is decreased.
The total area of general monolith converte
r
is about 45,000 ~ 500,000 ft3. (10 times of a
football field)
Generally Alumina (AL2 O3) is used as a
raw material and its 7 phases of gamma,
delta, theta have big areas and high stability
for the temperature, and nowadays gamma
Alumina is used usually.

0-6
RODIUS 2005.07
8810-01
AIR BAG SYSTEM
3. AIRBAG FUNCTION DESCRIPTION
1) Bag (Cushion)
The airbag system performance is influenced on the cushion size, shape and position.
The cushion strength is a important parameter on the impact absorb effect.
Therefore, the control of the airbag performance depends on cushion size, shape, inflato
r
characteristic and vent hole size for the gas discharge.
The cushion’s material and folding function to control the cushion deployment
direction and the performance to protect passenger’s face. ·
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2) Airbag Module
The driver airbag module is under the center pad of the steering wheel.
The passenger airbag module is installed in the instrument panel at passenger side.
The driver and passenger side airbag is inside each seat.
3) Module Cover/Housing
It is a type of a container that includes the cushion and the inflator.
The module housing functions to deliver the reaction force between the body structure and
the airbag (The airbag reaction is absorbed generally to the steering wheel or instrument
panel).
The module cover must be considered in a viewpoint of protection between exterior,
internal units and cushion. Also the module cover should be designed not to cause any
personal injury for deployment. ·
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Do not disassemble the airbag module because unintentional deployment of the airbags
resulting from any damage or interference of the module can cause injury. -

0-7
AIR BAG SYSTEM
RODIUS 2005.07
8810-01
4) Inflator
The inflator is a type of the direct gas generated device.
The inflator with initial low pressure provides negative restraint effect regarding passengers
moving and time.
On the contrary, the inflator with initial high pressure allows other components of the airbag
to make a excessive impact resulting in any personal injury.
Thus, the inflator output must be optimized according to the characteristic of the vehicle and
passenger moving.
The discharge gas has no toxicity or inflammability and also it is the important parameter to
control the high temperature for gas firing. ·
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5) SDM (Sensing and Diagnostic Module)
The airbag system consists of the module section (driver, passenger and side), seat belt
section and SDM.
The SDM has no user-serviceable parts and monitors the system components continuously.
The SDM also records any faults which are discovered.
The SDM allows the fault codes to be retrieved with a scan tool and illuminates a warning
lamp that alerts the driver to any faults. 1.
2.
3.
The SDM located on floor beneath the floor console assembly. The SDM performs the
following functions:
Impact decision processor function.
Determine the airbag deployment through the impact signal of the accelerometer sensor and
the safety sensor. ·
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Malfunction detection and recording any faults that are detected.
Monitor the supplemental restrain system electrical components and set a diagnostic trouble
code when malfunction is detected.
Display airbag fault codes Display airbag fault codes and system status information when
connected to a scan tool.
Self-diagnosis function Illuminate the AIRBAG indicator to alert the driver to any fault.
Power supply function Provide a reserve power source to deploy the airbags and
pretensioners if an accident has disabled the normal power source. ·
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