2012 SSANGYONG KORANDO Service Manual

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4. INPUT/OUTPUT DEVICES
The engine ECU calculates the accelerator pedal based on the input signals from various sensors, and
controls the overall operation of the vehicle.
The ECU receives the signals from various sensor through data line, and performs effective airfuel ratio
control based on these signals.

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1. TROUBLESHOOTING

05-4
2. LAYOUT
Exhaust Manifold Assy
Exhaust Manifold Gasket
Hex Flange Nut
Heat Protector Assy
Hex Bolt (M6 X 1 X 25)
Heat Protector Assy
Hex Bolt (M8 X 1.25 X 16) 1.
2.
3.
4.
5.
6.
7.

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WCC Compl
Exhaust FRT Pipe Assy
UCC Compl
Muffler Complete ?RR
Exhaust FRT Heat Protector
CTR Muffler Heat Protector
RR Muffler Heat Protector
Clamp
Gasket 1.
2.
3.
4.
5.
6.
7.
8.
9.Hanger
Hanger
Hanger
Nut
Nut
Bolt
Gasket Ring
Nut
CTR Muffler Complete 10.
11.
12.
13.
14.
15.
16.
19.
20.

05-6
3. CAUTIONS
Do not park the vehicle on flammable materials, such as grass, leaves and carpet.
Do not touch the catalyst or the exhaust gas ignition system when the engine is running.
If a misfire occurs in the combustion chamber or the emission of pollutant exceeds the specified level,
the catalyst can be damaged.
When servicing or replacing components of the exhaust system, makes sure that the components
are positioned at regular intervals from all other parts of the under body.
Be careful not to damage the exhaust system when lifting the vehicle from its side.
All components and body parts of the engine exhaust system should be inspected for crack, damage,
air hole, part loss and incorrect mounting location. Also check for any deformation which can result in
exhaust gas drawn into the vehicle.
Make sure that the exhaust pipe is cooled down sufficiently before working on it because it is still hot
right after the engine is stopped.
Wear protective gloves when removing the exhaust pipe. -
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1. OVERVIEW
This system purifies the exhaust gas generated by the combustion in the engine to reduce the pollutants
and noise during that arise during combustion.
Harmful materials produced in the combustion process is treated and reduced in the exhaust system.
Harmful materials discharged from the crankcase and fuel tank is drawn into the intake system again to
reduce discharge amount of harmful materials.
Emission aftertreatment system ▶
Catalytic Converter & O2 Sensor
The catalytic converter is a monolith type purification system composed of cordierite which purifies
exhaust gas through the small holes of active monolith catalyst from the exhaust manifold. As exhaus
t
gas passes through the small holes in the layer in the middle, its CO and HC are reduced by
oxidization reaction and its NOx is reduced by reduction reaction to Pt, Ph and Pd. The oxygen
sensor sends signals for feedback and determination of catalyst condition. For detailed description,
see the corresponding section. -
The fuel evaporative gas is a gas evaporated to the atmosphere in the section between the fuel tank and
fuel line, and its main component is hydrocarbon (HC). The fuel evaporative gas is temporarily stored in
the canister, and it is drawn to the engine through the throttle body when the purge control solenoid valve
is open according to the engine operating condition.
Gas in the combustion chamber is sealed by the piston. However, gas is leaked through the gap
between the cylinder and piston and drawn into the crankcase during the compression and explosion
strokes. This gas is blow-by gas and its main components are hydrocarbon and carbon monoxide. If this
gas is drawn into the crankcase, the system can be corroded and oil can be deteriorated. Also, if this
gas is discharged into the air, it can pollute the environment. To prevent these, the blow-by gas
reduction system (also called as crankcase ventilation system) draws the blow-by gas from the
crankcase to the combustion chamber for combustion.
Purge Canister Control ▶
Blow-by gas control system (crankcase ventilation system) ▶

05-8
PCV valve
2. COMPONENTS
Engine ECUWCCEngine CHECK lamp
Blow-by hoseExhaust manifold

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Rear oxygen sensor
Exhaust No.2Exhaust No.1Exhaust No.3
(main muffler)
UCCFront oxygen sensor