SsangYong Actyon Sports II. Manual — part 27
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.
04-5
1719-00
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
04-7
1719-00
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".
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