Page 140 of 751

07-6
2. FUNCTIONS OF LUBRICATION
1) Lubrication
It creates a viscous barrier between moving parts that reduces friction, which means less heat and
longer life for those parts. As a lubricant, oil must maintain a protective film to prevent metal-to-metal
contact. It must be fluid enough to allow easy starting and to circulate quickly through the engine, yet
remain thick enough at higher operating temperatures and speeds to provide adequate lubrication.
2) Cooling
Combustion heat and friction energy must be removed from the engine in order to prevent its
overheating. Most of heat energy is taken by the engine oil.
Clean oil passages, proper viscosity and low contamination provide sufficient flow rate of the engine oil
and effective cooling.
3) Sealing
It helps to seal the space between the pistons and the cylinder walls so that compression is more
effective and power is not lost during combustion.
4) Anti-corrosion
As a corrosion inhibitor, oil coats internal engine parts to prevent surface rust on the inside of the engine
which can be caused by blow-by products and water formed in combustion. It must also be capable of
neutralizing the acids that are formed by combusti on blow-by and oil oxidation at high temperatures.
5) Cleaning
The small particles of dirt or other contaminants are suspended in oil and carried away to be filtered out.
As a detergent, engine oil must be able to gather and suspend dirt and other contaminants until the oil
can leave them as it passes through the filter and returns to the internal engine environment.
Page 145 of 751

08-71520-00
3. CAUTIONS
If 100% of anti-freeze is added, the water pump vane can be damaged and thermal conductivity
can be decreased resulting in poor circulation in the cooling system which leads to overheated
engine.
Use of non-recommended coolant could cause damage to the cooling system and overheating of
the engine.
Opening the coolant reservoir cap while the engine is running or hot can cause burns by hot steam
or water.
To open the coolant reservoir cap, wrap the cap with a wet towel or thick cloth after the engine is
cooled down sufficiently.
If cool water is added to the heated engine, the engine or radiator can be deformed.
The anti-freeze in the coolant can damage the painted surface, so avoid the contact of the coolant
to the painted body.
The anti-freeze and water should be mixed in proper mixture ratio. Never add only water when
adding coolant.
If the anti-freeze content is too low, the coolant can be frozen while the engine can be overheated if
anti-freeze content is too high. -
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Page 196 of 751

14-12
Front temperature sensor
Measures the temperature of
exhaust gas.
This sensor is located at the rear
side of exhaust manifold and
monitors the temperature of
combusted gas to prevent the
exhaust system from overheating.
When the temperature gets higher,
this sensor cuts off the fuel delivery
and controls the EGR to lower the
temperature.Rear temperature sensor
Measure the outlet
temperature of DOC.
This sensor is located at the
rear side of DOC and
monitors the overheating of
CDPF and post injection
volume.
Engine ECU (D20DTR)
Differential pressure sensor
Measures the difference between
inlet and outlet pressures of CDPF.
If the difference is higher than the
specified value when collecting the
PM, this makes the post injection for
forced recycling of PM.
T-MAP sensorIntake air
mass
Measures
the
excessive
amount of
PM.
Boos
t
pressure
/
temperature
Injector (C31)
Controls the post injection.
Electric throttle body
Controls the intake air mass.
HFM sensor
Wide band
oxygen senso
r
Page 279 of 751

04-4
1. DESCRIPTION AND OPERATION
1) Exhaust System
When you are inspecting or replacing exhaust system components, make sure there is adequate
clearance from all points on the underbody to avoid possible
overheating of the floor panel and possible damage to the passenger compartment insulation and trim
materials.
Check the complete exhaust system and the nearby body areas and trunk lid for broken, damaged,
missing or mispositioned parts, open seams, holes, loose connections, or other deterioration which
could permit exhaust fumes to seep into the trunk may be an indication of a problem in one of these
areas. Any defects should be corrected immediately.
2) Catalytic Converter (Gasoline Engine)
When jacking or lifting the vehicle from the body side rails, be certain that the lift pads do not contact
the catalytic converter, as this could damage the catalytic converter.
Use of anything other than unleaded fuel will damage the catalyst in the catalytic converter. 1.
2.
Catalytic Converter 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 prope
r
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 converter is about 45, 000~500,000ft3. (10
times of a football field) Generally Alumina (AL2 O3) is
used as a raw materialand its 7 phases of gamma,
delta, theta have big areas and high stability for the
temperature, and nowadays gamma Alumina is used
usually.
Page 388 of 751

04-58210-01
1. DESCRIPTIONS OF INDICATOR DISPLAY
Tachometer
SSPS warning light
Immobilizer indicator
Glow indicator
ESP indicator/warning light
Front fog light indicator
High beam indicator
ESP OFF indicator
Seat belt reminder (driver’s seat)
Seat belt reminder (passenger’s seat)
Engine oil pressure warning light
LCD Display
Engine overheat warning light
Engine check warning light
Auto cruise indicator
Light indicator
Winter mode indicator 1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.Engine hood open warning light
Battery charge warning light
Hazard Indicator
Water separator warning light
Air bag warning light
4WD CHECK warning light
4WD LOW indicator
4WD HIGH indicator
Speedometer
Turn signal indicator
Coolant temperature gauge
Brake warning light
Door ajar warning light
ABS warning light
Fuel gauge
Low fuel level warning light 18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33. It sends and receives information to/from each unit through CAN communication line. The LCD display
and separate ESP ON/OFF indicator are newly added.
Page 393 of 751
04-10
No. Symbol Item
24Engine oil pressure
warning lamp
25Water separator
warning light
26Engine coolant
overheat warning light
27Engine hood open
warning lamp
28 EBD warning light
29 SSPS warning lamp
30Hazard warning lampPower Turning ON condition
IGN Signal input
IGN IGN ON/ CAN signal input
IGN IGN ON/ CAN signal input
IGN Switch ground
IGN CAN signal input
IGN Digital input
IGN Switch to High
Page 403 of 751

04-20
3. WARNING LIGHTS AND INDICATORS
ESP OFF Indicator
This lamp comes on when
pressing the "ESP OFF" switch or
the ESP system is defective.
When the ESP system is
activated, this lamp blinks and a
chime sounds.
Immobilizer Indicator
This indicator comes on
when the ignition key is
communicating with the
engine control unit for
approx. 0.5 seconds.Glow Indicator
When the ignition key is turned
ON, this indicator lamp comes on
and the combustion chamber is
warmed up. In the vehicle
equipped with direct injection type
engine, this indicator may come
on very shortly or may not come
on.
Fog Lamp / Headlamp
High Beam Indicator
This lamp comes on when
the fog lamp or high beam
headlamp operates to
indicate the operating
status.Engine Oil Pressure Warning
Light
This lamp comes on if there is any
fault in the engine oil system and
goes off when a certain amount of
time has elapsed after turning ON
the ignition switch.
Door ajar warning
light
This light comes on
when a door or
tailgate is either
opened or not closed
completely.Brake warning light
This warning light comes on
and warning buzzer sounds
when the parking brake is
applied and/or the brake fluid
level is lower than specified
level.Seat belt warning lamp
The seat belt warning light comes on and
the seat belt warning chime sounds for 6
seconds when the ignition switch is
turned to "ON" position unless the
driver's seat belt is securely fastened.
This reminding operation stops when the
driver fastens the seat belt.
Engine Coolant Overheat
Warning Light
When the coolant temperature is
abnormally hot (over 120℃), this
warning light blinks and a warning
buzzer sounds at 1 Hz. (check
cooling system)
SSPS warning light
This warning light comes on when
the SSPS system is defective.
When this warning light comes
on, the steerability becomes
heavier.
Page 406 of 751
04-238210-01
5. BUZZER OUTPUT
Priority ItemBuzzer output time
Operating condition
ON OFF
1 "R" PAS buzzer output 75ms 610ms 610msec delay and then generate
75ms buzzer output
2 Overspeed warning 500ms 200ms Buzzer on when dial indication
speed exceeds 120km/h
3 ESP buzzer output 100ms 100ms Interior buzzer (PAS buzzer) ON
4 TEMP warning output 500ms 500ms Engine overheats
5 Fuel filter 500ms 500ms Water separator warning light ON
with IGN ON
If the signal with higher priority is activated during the operation of signal with lower priority, the
current operation should be completed before starting the operation with higher priority.
If there are multiple signals at a time, the operation should be completed in order of priority. -
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