SsangYong Korando III (2010 year). Manual — part 81
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Rear temp. sensor:
Measure DPF
temp.
DPF performs
recycling
(combustion)
process at 600C,
and rear
temperature sensor
monitors the
temperature of DPF.
Differential pressure
sensor measures the
pressure difference
between pre-CDPF
and post-CDPF (If
PM has been
accumulated, the
measured value is
over the specified
value).
Diff. pres. sensor:
Measure
pressure between
front side and
rear side of CDPF
Injector: Control
post injection
Front temp.
sensor: Measure
DOC temp.
DOC performs
oxidation and
reduction process at
300~500˚C, and
front temperature
sensor monitors the
temperature of
DOC.
Electronic
throttle body:
Control intake air
mass
ECU (DCM 3.7)
d. Operation process
When the differential pressure sensor detects the pressure difference between the front and the rear
side of CDPF, the sensor sends signal indicating the soot is accumulated and the post injection is
performed to raise the temperature of exhaust gas. The amount of fuel injected is determined according
to the temperature of exhaust gas detected by the rear temperature sensor. If the temperature is below
600°C, the amount of fuel injected is increased to raise the temperature. If the temperature is over
600°C, the amount of fuel injected is decreased or not controlled. When the engine is running in
low load range, the amount of post injection and the amount of intake air are controlled. It is to raise the
temperature by increasing the amount of fuel while decreasing the amount of intake air.
T-MAP sensor
Intake air
mass
Exceed PM
limit
Booster
pressure/
temperature
Post injection
Control intake air
mass
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e. Cautions
Use only specified Engine Oil (approved by MB Sheet 229.51) for CDPF.
-
1. Use only specified engine oil (Low Ash Oil)
The vehicle equipped with CDPF should use specific engine oil to improve the engine performance
and fuel economy, and ensure the service life of CDPF.
-
2. Issue with normal engine oil
Sulfur, one of the contents of engine oil is burned and generates soot that is not regenerated by the
DPF. This remains on the filter as ashes and keeps accumulating. Eventually, this ashes will block the
filter.
-
3. Benefit for specified engine oil
Minimized the sulfur content of engine oil which reduces the service life.
Improved fuel economy and emission level of CO2 with high performance and low viscosity.
Increased service life of engine oil with high resistance to temperature.
-
-
-
4. Problems when using unspecified engine oil
The service life of filter may be reduced by 30% or more by the ashes accumulated on the filter.
The fuel economy may be reduced because of engine rolling resistance, frequent regeneration of
DPF.
-
-
These problems are also caused by oil with high sulfur content, such as tax exemption oil and
heating oil, etc.
*
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3) Input/Output for CAN communication
(1) Configuration of CAN (P-CAN/B-CAN)
CAN Topology communicate with system units. There are two types (P-CAN and B-CAN) of
communication according to the communication speed. Instrument cluster, BCM and diagnostic
connector use both types of communication. And, ECU, ABS & ESP, TCU, GCU, E-coupling and EPS
unit use P-CAN communication because it is faster than B-CAN. The terminal resistances are installed in
ECU and BCM.
Abbreviation
Function
GCU
Glow Control Unit
EPS
Electronic Power Steering Unit
BCM
Body Control Module
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(2) CAN communication flow chart
Splice pack
Wiring harness
Location
S101
Floor wiring (LH)
Under fuse & relay box in engine compartment
S102
Floor wiring (RH)
Inside of right fender
S201
Main wiring
Behind meter cluster (cowl cross member)
S202
Main wiring
Behind meter cluster (cowl cross member)
S205
Floor wiring (LH)
Under driver's door scarf
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