SsangYong Korando III (2010 year). Manual - part 69

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ECU (DCM 3.7)

T-MAP sensor

Intake air 

volume

Detecting 

excess of PM 

amount limit

Boost 

pressure/ 

temperature

Front EGT sensor

Measures the temperature of 

DOC.

The DOC performs the redox 
reaction at between 300 and 
500℃ and the front EGT 
sensor monitors the 
temperature of DOC.

Differential pressure sensor

Measures the pressure values 

of before and after the CDPF.

The pressure difference 
between before and after the 
CDPF is measured by the 
differential pressure sensor (If 
PM is collected in the CDPF, 
the pressure difference 
between before and after the 
CDPF exceeds the specified 
value).

Rear EGT sensor

Measures the temperature of 

DPF.

The DPF burns the soot with 
hot exhaust gases 
(regeneration) at around 
600℃ and the rear EGT 
sensor monitors the 
temperature of DPF. 

Injector (C3I)

Controls the post-injection.

Electric throttle body

Controls the intake air 

volume.

HFM sensor

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Collecting PM

→ Regeneration

The engine ECU detects the 
amount of PM collected by the 
information from the 
temperature sensors and 
differential pressure sensor. 
When the soot is accumulated, 
the engine ECU performs post-
injection to increase the 
exhaust gas temperature and 
burns the collected PM at 
approx. 600°C.

Oxidation (DOC)

When the exhaust gas enters 
into the CDPF assembly, its 
CO, HC and PM are reduced 
by the redox reaction of the 
DOC. The remaining PM is 
filtered and collected in CDPF, 
and the temperature of the 
exhaust gas is increased to 
between 450 and 500°C.

5. OPERATING PROCESS

[Configuration and principle of operation]

The exhaust gas 

passed through the 

exhaust manifold 

enters into the CDPF 

assembly (at approx 
250℃).

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6. OPERATING TEMPERATURE

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7. ELECTRIC CIRCUIT DIAGRAM