2012 SSANGYONG NEW ACTYON SPORTS Service Manual

03-26
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 air-fuel
ratio control based on these signals.
The crankshaft speed (position) sensor measures the engine speed, and the camshaft speed
(position) sensor determines the order of injections, and the ECU detects the amount of the
accelerator pedal depressed (driver's will) by receiving the electrical signals from the accelerator
pedal sensor.
The mass air flow sensor detects the volume of intake air and sends the value to the ECU.
The major function of the ECU is controlling air-fuel ratio to reduce the emission level (EGR valve
control) by detecting instantaneous air flow change with the signals from the mass air flow sensor.
Also, the ECU uses the signals from the coolant temperature & air temperature sensors, booster
pressure sensor, atmospheric pressure sensor to: a) determine injection starting point and set
value for pilot injection, and b) deal with various operations and variable conditions.

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1. SPECIFICATION
Shorten the service interval under severe conditions such as driving on a dusty road or offroad. *
Unit Description Specification
Air cleaner elementFilter type Dry, filter element
Initial resistance Max. 300 mmAq
Service interval EU; Clean or change every 20,000 km
GEN: Clean or change every 15,000 km
Air cleaner assemblyWeight 103.9 kg
Operating temperature-30 ~ 100˚C
IntercoolerCore material Aluminum
Size 614W x 192H x 30T
Core size 614W x 192H x 30T
Tank material Plastic (Molding)
Efficiency 80%

04-4
2. INSPECTION
1) Troubleshooting
When Abnormal Noises are Heard from the Engine Room ▶
For the vehicle equipped with DI engine, if a learning noise occurs in each range or other
noises occur, the major cause of it is a faulty turbocharger assembly. But an interference issue,
poor tightness or loose in the intake and exhaust system also can cause those noises. This is
mainly because the operator didn't follow the instruction exactly when reconnecting the intake
hoses and pipes which were disconnected to check the system or replace the air cleaner. If the
intake system is free of any faults, check the EGR and PCV oil separator connected to the
intake system.
The figure may be different from the actual engine. Therefore, read thoroughly below before
replacing the parts.
2) Abnormal Noise Caused by Poor Tightness of Intake System
When the DI engine is running, the air entered into the engine flows in the sequence as shown
above. If high intake pressure is applied to the loose or damaged part, a whistling noise may
occur, the intake air volume is measured incorrectly or the engine power is derated.

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3) Troubleshooting Sequence
The basic checks for intake system are as follows:
Basic Checks for Intake System ▶
Make sure to replace or clean the air
cleaner element periodically. Otherwise,
engine will be derated or work abnormally
because of low intake air volume.
Unlike the fuel system, which is a closed
circuit, the intake system is an open circuit
system. Therefore any malfunction may
occur due to dust and dirt.
Most of the connections consist of hoses
so the system cannot withstand high
temperature and pressure. Also it can be
deformed or loosened easily because it is a
clamp mounting system. Thus, when
checking the engine, basic inspections,
such as tightened status check and visual
inspection for hose, etc., should be carried
out in advance.
Other Checks for Intake System ▶
If the intake system is free of any faults,
check for EGR and PCV oil separator.

04-6
1. OVERVIEW
The intake system for D20DTR engine is equipped with a throttle body which includes a flap. This
flap is controlled by an electrical signal to cut off the intake air entering to the engine when the
ignition switch is turned off. Because of this, the shape of the intake manifold has been changed
and improved HFM sensor is newly adopted to control the intake air volume more precisely.
2. COMPONENT
2330-01 Intercooler assembly
2313-15 HFM sensor
HFM sensor, version 6
*For more information, refer to Chapter "Engine
Control".
2313-01 Air cleaner assembly

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1719-02 Swirl control valve
Operating variably in accordance with the
engine load and rpm.* For more information,
refer to Chapter "Engine Control".
1719-01 Intake manifold
Passage for variable swirl valve and for intake
air
1719-16 Electric throttle body
* For more information, refer to Chapter
"Engine Control".

04-8
3. INPUT/OUTPUT OF INTAKE SYSTEM
For more information, refer to Chapter " Engine Control". *

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4. OPERATING PROCESS
Work Flow ▶