Cleanness of DI Engine Fuel System and Service Procedures
The fuel system for DI engine consists of transfer (low pressure) line and high pressure line. Its highest pressure
reaches over 1600 bar. Some components in injector and HP pump are machined at the micrometer 100 µm of
preciseness. The pressure regulation and injector operation are done by electric source from engine ECU.
Accordingly, if the internal valve is stucked due to foreign materials, injector remains open. Even in this case, the
HP pump still operates to supply high pressurized fuel. This increases the pressure to combustion chamber (over
250 bar) and may cause fatal damage to engine.
Y ou can compare the thickness of injector nozzle hole and hair as shown in below figure (left side). The right side
figure shows the clearance between internal operating elements.
Valve actuator lift: 0.028 mm
Hair
Diameter: 0.40 mm
Operating
Nozzle hole
clearance:
0.002 mm
Diameter:
2.0 mm
Y220_0A035
The core elements of fuel system has very high preciseness that is easily affected by dust or very small foreign
material. Therefore, make sure to keep the preliminary works and job procedures in next pages. If not, lots of
system problems and claims may arise.
GENERAL INFORMA TION
DI ENG SM - 2004.4
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DI0A-4
Job procedures
1. Always keep the workshop and lift clean (especially, from dust).
2. Always keep the tools clean (from oil or foreign materials).
3. Wear a clean vinyl apron to prevent the fuzz, dust and foreign materials from getting into fuel system. Wash
your hands and do not wear working gloves.
4. Follow the below procedures before starting service works for fuel system.
Carefully listen the symptoms and problems from customer.
Visually check the leaks and vehicle appearance on the wiring harnesses
and connectors in engine compartment.
Perform the diagnosis proceee with Scan-i
(refer to “DIAGNOSIS” section in this manual).
Locate the fault. If the cause is from fuel system (from priming pump to
injector, including return line), follow the step 1 through step 3 above.
5. If the problem is from HP pump, fuel supply line or injector, prepare the clean special tools and sealing caps
to perform the diagnosis for DI engine fuel system in “DIAGNOSIS” section in this manual. At this point,
thoroughly clean the related area in engine compartment.
Notice
Clean the engine compartment before starting service works.
Tool kit for high pressure lineTook kit for low pressure lineRemoval tool box and cap kits
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GENERAL INFORMA TION
DI ENG SM - 2004.4
6. Follow the job procedures. If you find a defective component, replace it with new one.
Disconnect the negative battery cable.
For safety reasons: check pressure is low before opening the HP systems (pipes)
Use special tools and torque wrench to perform the correct works.
Once disconnected, the fuel pipes between HP pump and fuel rail and between fuel rail
and each injector should be replaced with new ones. The pipes should be tightened to
specified tightening torques during installation. Over or under torques out of specified
range may cause damages and leaks at connections. Once installed, the pipes have been
deformed according to the force during installtion, therefore they are not reusable.
The copper washer on injector should be replaced with new one. The injector holder bolt
should be tightened to specified tightening torque as well. If not, the injection point may be
deviated from correct position, and it may cause engine disorder.
DI0A-5
Plug the disconnected parts with sealing caps, and remove the caps immediately
High pressure pump
IMV valve
Transfer pump and high
pressure pump
Fuel temperature sensor
Water separator
Water detection sensor
Fuel filter
before replacing the components.
Priming
pump
Fuel pressure sensor
Injection
pipe
Common rail
GENERAL INFORMA TION
DI ENG SM - 2004.4
Fuel tank
Injector
Cap position
Supply line
Return line
Y220_0A039
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7. Plug the removed components with clean and
undamaged sealing caps and store it into the box to
keep the conditions when it was installed.
8. Clear the high pressure offset value by Scan-100 after
replacing the high pressure pump.
Y220_0A040
9. To supply the fuel to transfer line of HP pump press
the priming pump until it becomes hard.
Warning
Do not crank engine before having filled pump.
Priming pump
Y220_0A041
Y220_0A042
10. Check the installed components again and connect
the negative battery cable. Start the engine and check
the operating status.
1 1. With Scan-i, check if there are current faults and erase
the history faults.
Note
For details, refer to “DI10 Diagnosis teable”.
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GENERAL INFORMA TION
DI ENG SM - 2004.4
DI0A-7
DI Engine and Its Expected Problems and Remedies Can be Caused
by Water in Fuel
SYSTEM SUPPLEMENT AGAINST PARAFFIN SEPARATION.
In case of Diesel fuel, paraffin, one of the elements, can be separated from fuel during winter and then can stick on
the fuel filter blocking fuel flow and causing difficult starting finally. Oil companies supply summer fuel and winter
fuel by differentiating mixing ratio of kerosene and other elements by region and season. However, above phenomenon
can be happened if stations have poor facilities or sell improper fuel for the season.
In case of DI engine, purity of fuel is very important factor to keep internal preciseness of HP pump and injector.
Accordingly , more dense mesh than conventional fuel filter is used. To prevent fuel filter internal clogging due to
paraffin separation, SYMC is using fuel line that high pressure and temperature fuel injected by injector returns
through fuel filter to have an effect of built-in heater (see fuel system).
SYSTEM SUPPLEMENT AND REMEDY AGAINST WATER IN FUEL
As mentioned above, some gas stations supply fuel with
excessive than specified water. In the conventional IDI
engine, excessive water in the fuel only causes dropping
engine power or engine hunting. However, fuel system in
the DI engine consists of precise components so water in
the fuel can cause malfunctions of HP pump due to poor
lubrication of pump caused by poor coating film during high
speed pumping and bacterization (under long period parking).
T o prevent problems can be caused by excessive water in
fuel, water separator is installed inside of fuel filter. When
fuel is passing filter, water that has relatively bigger specific
gravity is accumulated on the bottom of the filter.
Y220_0A041
If water in the separator on the fuel filter exceeds a certain level, it will be supplied to HP pump with fuel, so the
engine ECU turns on warning light () on the meter cluster and buzzer if water level is higher than a certain level.
Due to engine layout, a customer cannot easily drain water from fuel filter directly, so if a customer checks in to
change engine oil, be sure to perform water drain from fuel filter. (See fuel system for details.)
GENERAL INFORMA TION
DI ENG SM - 2004.4
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STRUCTURE
Front view
Rear view
1. TVD (Torsional Vibration Damper)
2. Air conditioner compressor
3. Power steering pump pulley
4. Idle pulley
5. Water pump pulley
6. Alternator
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7. Cooling fan pulley & viscos clutch
8. Aut tensioner pulley
9. Auto tensioner
10. Poly-groove belt
11. Cam position sensor
12. Drive plate (M/T: DMF)
Y220_0A001
13. Oil filter housing
14. Vacuum pump
15. Crank position sensor
16. EGR valve
17. Power steering pump
18. EGR center pipe
GENERAL INFORMA TION
DI ENG SM - 2004.4
Top view
DI0A-9
19. Cylinder head cover
20. Intake manifold
21. Water outlet port
22. Common rail
23. Fuel pressure sensor
GENERAL INFORMA TION
DI ENG SM - 2004.4
24. Fuel pipe
25. Injector
26. Fuel return line
27. Oil filler cap
28. Glow plug
Y220_0A002
29. Booster pressure sensor
30. Oil separator
31. Oil dipstic
32. EGR center pipe
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DI0A-10
Left side view
33. Cylinder head
34. Cylinder block
35. Oil pan
36. Drain plug
37. Turbocharger
Right side view
38. EGR - RH pipe
39. Oil separator
40. Oil dipstic
41. HP pump
Y220_0A003
42. Turbocharger vacuum modulator
43. EGR valve vacuum modulator
44. EGR valve
45. Exhaust manifold
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GENERAL INFORMA TION
DI ENG SM - 2004.4
ENGINE CONTROLS
ECU RELA TED COMPONENTS
DI0A-11
ECU/barometric sensorCam position sensor
(water detection sensor)
Fuel filter
Accelerator pedal sensor
HFM sensor/intake air
temperature sensor
GENERAL INFORMA TION
DI ENG SM - 2004.4
Pre heating time relayMain relay
Y220_0A004
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ENGINE AND SENSORS
Injector
Glow plug
Common rail
Crankshaft position
sensor
Fuel pressure sensor
Camshaft position
sensor
HP pump
Coolant temperature
sensor
Booster pressure sensor
Knock sensor (2)
Y220_0A005
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GENERAL INFORMA TION
DI ENG SM - 2004.4
ELECTRICAL COMPONENTS AND PRE HEATING SYSTEM
Glow plugPre heating time relay
DI0A-13
GENERAL INFORMA TION
DI ENG SM - 2004.4
Starter motor
BatteryFuse box
Alternator
Y220_0A006
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INTAKE SYSTEM
Air cleaner assemblyIntake duct hoseHFM sensorIntake manifold
According to input signals from various sensors, engine ECU calculates driver’s demand (position of the accelerator
pedal) and then controls overall operating performance of engine and vehicle on that time.
ECU receives signals from sensors via data line and then performs effective engine air-fuel ratio controls based on those
signals. Engine speed is measured by crankshaft speed (position) sensor and camshaft speed (position) sensor determines injection order and ECU detects driver’s pedal position (driver’s demand) through electrical signal that is generated by variable resistance changes in accelerator pedal sensor. Air flow (hot film) sensor detects intake air volume and
sends the signals to ECU. Especially, the engine ECU controls the air-fuel ratio by recognizing instant air volume
changes from air flow sensor to decrease the emissions (EGR valve control). Furthermore, ECU uses signals from
coolant temperature sensor and air temperature sensor, booster pressure sensor and barometric sensor as compensation signal to respond to injection starting, pilot injection set values, various operations and variables.
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GENERAL INFORMA TION
DI ENG SM - 2004.4
GENERAL SPECIFICATIONS
VEHICLE SPECIFICA TIONS
DI0A-23
Vehicle Dimension
(mm)
GENERAL INFORMA TION
DI ENG SM - 2004.4
Y220_0A017
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Specifications
SystemsItemsDieselRemark
GeneralOverall length (mm)
Overall width (mm)
Overall height (mm)
4,720 (4,785)
1,870
1,760 (1,830)
( ):optional
item
Engine
Gross vehicle weight (kg)
Curb weight (kg)
Min. turning radius (m)
Ground clearance (mm)
Fuel
Fuel tank capacity
Model
No. of cyl./Compression ratio
Total displacement
Camshaft arrangement
Max. power
Max. torque
Injection timing
Idle speed
Cooling system
Coolant capacity
Lubrication
Max. oil capacity
* Please contact Ssangyong Dealer for approved alternative fluid.
**In only case not available MB 229.1 or 229.3, API or ACEA oil may be accepted, however it would rather recommend
to shorten the change interval around 30%.
IDI: Indirect Injection
DI: Direct Injection
GENERAL INFORMA TION
DI ENG SM - 2004.4
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VEHICLE IDENTIFICATION
1. Vehicle identification Number
Vehicle identification number (VIN) is is on the right front
axle upper frame.
[KPTPOA19S1P 122357]
K.. Nation(K: Korea)
P.. Maker Identification (P: Ssangyong Motor Company)
T .. Vehicle Type(T: Passenger car - 4WD)
P.. Line Models(P: Rexton)
O . Body T ype(O: 5-door)
A.. Trim Level(A: Standard, B: Deluxe,
S.. Check Digit(S: All area except North America)
1 .. Model Y ear(1: 2001, 2: 2002, 3: 2003)
P.. Plant Code(P: Pyungtaek plant)
122357(Production serial number)
Y220_0A018
2. Certification Label
The certification label is affixed on the bottom of driver’s side
B-pillar.
Y220_0A019
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DI ENG SM - 2004.4
3. Engine Serial Number
The engine serial number is stamped on the lower area of
cylinder block in exhaust manifold side.
4. Manual Transmission Number
The transmission label is affixed on the upper area of clutch
housing.
DI0A-29
Y220_0A020
5. Automatic Transmission Number
The transmisson label is affixed on the right area of transmission housing.
6. Transfer Case Number
The transfer case label is affixed on the transfer case housing.
Y220_0A021
GENERAL INFORMA TION
DI ENG SM - 2004.4
Y220_0A022
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HOW TO USE AND MAINTAIN WORKSHOP MANUAL
CONSISTS OF WORKSHOP
MANUAL
1. Group: The manual is divided in large group like
engine, transmission, axle and others and this group
is also divided in small group by vehicle state.
2. Small group: Each small group consists of general,
vehicle service, unit repair and special tool usage.
MANUAL DESCRIPTION
• The contents of the manual consist of operational
principle of system, specifications, diagnosis, removal/
installation on vehicle, inspections, disassembly/
assembly of removed assembly, special tool usage.
Not providing simple removal/installation information
but focused on to describe much more functions, roles
and principles of system.
• Every automotive term like part name on the manual
is the same in parts catalog, technical bulletin and
drawings to avoid confusion among them.
Abbreviation of small
group and page
Consists of Small Group
1. Contents: In small group, included subjects and
detailed subjects are descri bed in.
2. General: In the general, summary of the small group
(assembly), function and operational principle,
specifications, structure and components, diagnosis
and circuit diagra m are described in.
3. Vehicle service: Service works on the vehicle like
replacement of parts and inspection repairs are
described in the order of repair works with actual
photos and illustrations. Also cautions in service
works, references and inspection methods after
completion of service are described in.
4. Disassembly and assembly of unit assembly:
Detailed service works like disassembly, inspecti on,
adjustment and assembly on removed component
(assembly) are described in with systematic contents
and photo illustration.
Vehicle model
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Describes information on the manual
like modification, application date,
applicable V.I.N
Bolded: Notice, Installation Notice,
Note
Describes small group name, model
and publication date
GENERAL INFORMA TION
DI ENG SM - 2004.4
GUIDELINES FOR SERVICE WORK SAFETY
DI0A-31
General
Y220_0A024
T o maintain and operate the vehicle under optimum state
by performing safe service works, the service works should
be done by following correct methods and procedures.
Accordingly, the purpose of this manual is to prevent differences that can be caused by personal working method,
skill, ways and service procedures and to allow prompt/
correct service works.
Note, Notice
While using this manual, there are a lot of Note or Notice
having below meaning.
Note
Note means detailed description of supplementary
information on work procedure or skill.
Notice
Notice means precautions on tool/device or part
damages or personal injuries that can occur during
service works.
However, above references and cautions cannot be inclusive measures, so should have habits of taking concerns
and cautions based on common senses.
Cautions on Inspection/Service
Notice
During service works, be sure to observe below general
items for your safety.
•
For service works, be sure to disconnect battery
negative (-) terminal if not starting and inspection.
•
While inspecting vehicle and replacing various
consumable parts, be sure to take caution not to
damage vehicle and injure people.
•
Engine and transmission may be hot enough to
burn you. So inspect related locations when they
cooled down enough.
•
If engine is running, keep your clothing, tools, hair
and hands away from moving parts.
•
Even when the ignition key is turned off and
positioned to LOCK, electrical fan can be operated
while working on near around electrical fan or
radiator grille if air conditioner or coolant
temperature rises.
•
Every oil can cause skin trouble. Immediately wash
out with soap if contacted.
•
Painted surface of the body can be damaged if
spilled over with oil or anti-freeze.
•
Never go under vehicle if supported only with jack.
•
Never near the battery and fuel related system to
flames that can cause fire like cigarette.
•
Never disconnect or connect battery terminal or other
electrical equipment if ignition key is turned on.
•
While connecting the battery terminals, be cautious
of polarities (+, –) not to be confused.
•
There are high voltage and currency on the battery
and vehicle wires. So there can be fire if shortcircuited.
•
Do not park while running the engine in an
enclosed area like garage. There can be toxication
with CO, so make sufficient ventilation.
•
The electrical fan works electrically. So the fan can
be operated unexpectedly during working causing
injuries if the ignition key is not in LOCK position.
Be sure to check whether ignition key is in LOCK
position before work.
•
Be careful not to touch hot components like
catalytic converter, muffler and exhaust pipe when
the engine is running or just stopped. They may
burn you badly.
GENERAL INFORMA TION
DI ENG SM - 2004.4
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