SsangYong Korando III (2010 year). Manual - part 361

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2. CAUTIONS

Standard pattern of soot accumulation

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(1) Abnormal Soot Accumulation

(2) Normal Soot Combustion

Cautions to protect the catalyst filter

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Use the designated fuel only.                                

Observe the recommended service intervals of engine oil.

Check the engine oil level frequently and add if necessary.               

Do not idle the vehicle unnecessarily.

Do not turn off the engine while the vehicle is running.                   

Do not shift the gear selector lever to neutral when going downhill.

Do not use improper engine oil or fuel additives.

Do not drive for a long time when the warning lamp is illuminated.

Make sure no flammable material, such as dry grass or tissue paper, contacts with the catalyst filter 

while the vehicle is parked.

For the vehicles used in urban traffic, driving on the expressways for more than 1 hour at least once 

per week is needed so that the PM inside CDPF isn't collected to one side only.

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(3) Warning Lamp Related to CDPF

CDPF regeneration process (warning lamp NOT illuminated)

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Overload of CDPF (warning lamp blinking)

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The CDPF system enters the regeneration mode 

when the driving distance becomes approx. 600 

to 1,200 km (may differ by the driving condition 

and driving style). Then, the engine ECU 

performs the CDPF regeneration operation. 

However, the driver is not informed with this 

operation by any engine warning lamp or vehicle 

signal, so he/she may not detect this operation. 

The control logic at the post-injection dur-ing the 

regeneration process is to increase the fuel 

injection volume and control the intake air volume 

(by the throttle body) in order to increase the 

temperature of the exhaust gas. The driver may 

not feel any particular difference from the vehicle.

If the CDPF cannot reach the regeneration 

temperature due to low speed driving or other 

reason during the regeneration process, the 

soot is continuously accumulated in the 

CDPF. When this condition continues and 

the CDPF is overloaded with soot, the engine 

warning lamp blinks to inform this situation to 

the driver.

In order to solve this problem, drive the 

vehicle at a speed of approx. 80 km/h for 15 

to 20 minutes to perform the CDPF 

regeneration process.

If the engine warning lamp on the instrument 

cluster blinks, the CDPF is overloaded. In this 

case, perform the step 2.

1.

2.

3.

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Excessive overload of CDPF (warning lamp illuminated)

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If the vehicle is driven at a speed of 5 to 10 

km/h for an extended period of time, the soot 

accumulated in the CDPF cannot be burned 

as the CDPF cannot reach the regeneration 

temperature. Then, an excessive amount of 

soot can be accumulated in the CDPF.

This case is much worse than the simple over-

load of the CDPF. To inform this to the driver, 

the engine warning lamp comes on and the 

engine power is decreased to protect the 

system.

To solve this problem, blow soot between the 

engine and exhaust system several times and 

erase the related DTC. Then, check if the 

same DTC is regenerated again. If so, check 

the DTC related to the differential pressure 

sensor.

1.

2.

3.

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1. OVERVIEW

The DOC (Diesel Oxidation Catalyst) generates CO2 and H2O which are harmless through the 

oxidation process of CO and HC. And the DPF (Diesel Particulate Filter) collects PM (Particle Matter) 

and is regenerated to reduce the quantity of particulates, HC and CO. But there is a limitation in reducing 

the emission of exhaust gas for each system, so the CDPF which combines these two system is 

applied.