SsangYong: Engine Euro 4. Manual — part 20
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
5
1792
EXHAUST SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
ENGINE
FUEL
I
N
T
AKE
EXHAUST
PRE-HEA
TING
LUB
COOLING
SWITCHABLE
ECU
DIAGNOSIS
3. Prevention of EGR valve’s chattering and improved durability
Two valve seats of the EGR valve decrease the chattering phenomenon of the valve occured by the pressure of
exhaust gas when the valve is being opened or closed. As to this, the durability of the valve stem has been
improved.
4. Cleaning function of EGR valve
The solenoid valve is operated when the engine is being turned off and is at mid-high speed to remove the foreign
materials (eg, carbon) accumulated on the valve seat and housing.
5. Learning function of EGR valve location for carbon accumulation
The E-EGR valve monitors the closed and open location of valve before turning off the engine. This value is
analyzed to compensate the changes in valve position occured by the accumulated carbon.
2. OPERATING RANGE OF E-EGR VALVE
The operating range and control range of the E-EGR valve are controlled by control logic (MAP). Followings show
only major operating range.
1. Intake air temperature : approx. -10°C ~ 50°C
2. Atmospheric pressure: Over approx. 0.92 bar
3. Engine coolant temperature: 0°C ~ 100°C
4. EGR valve shut-off when acceleration (engine rpm > 2600)
5. EGR valve shut-off when engine is idling for over 1 minute
6. EGR valve shut-off when vehicle speed is over 100 km/h
7. EGR valve shut-off when engine torque is over 380 Nm
8. EGR valve is normal when there is no DTC related to EGR valve.
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
6
1792
EXHAUST SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
3. STRUCTURE OF E-EGR VALVE
1. Valve body
2. Socket
3. Stem
4. Stem guide assembly
5. Valve disc (2) - Diameter
φ 24 mm
6. Spring
7. Spring disc
8. Solenoid housing assembly
9. Sealing assembly
10. Potentiometer and connector
11. Gasket
12. Bolt
Exhaust System with EGR Valve
To EGR
cooler
Exhaust gas
(From exhaust manifold)
VGT turbocharger
Exhaust pipe
Exhaust manifold
EGR pipe
E-EGR valve
EGR cooler
Internal Structure
EGR pipe
EGR pipe connecting
hole in intake manifold
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
7
1792
EXHAUST SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
ENGINE
FUEL
I
N
T
AKE
EXHAUST
PRE-HEA
TING
LUB
COOLING
SWITCHABLE
ECU
DIAGNOSIS
4. NEW DTCS FOR E-EGR
Engine
Malfunction
Indicator
light
P0405
P0406
P0407
P0408
High EGR
Open Position
deviation
High EGR
Close Position
Deviation
Low EGR
Position Signal
High EGR
Position Signal
- Causes
• The difference between E-EGR position demand
(MAP) value and E-EGR position feedback signal
value is over 15% (the sensor output indicates
E-EGR is open over 15% in the close status).
- Actions
• Measure the resistance of E-EGR valve sensor.
• Check the sensor and actuator wiring harness.
• Check the unit.
- Causes
• The difference between E-EGR position demand
(MAP) value and E-EGR position feedback signal
value is over 15% (the sensor output indicates
E-EGR is closed over 15% in the open status).
- Actions
• Measure the resistance of E-EGR valve sensor.
• Check the sensor and actuator wiring harness.
• Check the unit.
- Diagnosis of E-EGR signal for the followings:
• Sensor signal is high or low.
• Total resistance value: 4
Ω +/-40%
• Sensor output range: 1.2 ~ 4.0 V
• Total sensor resistance: 4 k
Ω ± 40%
• Total motor resistance: 8.0
Ω ± 0.5Ω
- Check pin for the followings:
• Check sensor reference voltage (5V) - ECU Pin
#A33
• Sensor signal - ECU Pin #A82
• Sensor GND - ECU Pin #A09
- Actions
• Measure the resistance of E-EGR valve sensor.
• Check the sensor and actuator wiring harness.
• Check the unit.
- Diagnosis of E-EGR signal for the followings:
• Sensor signal is high or low.
• Total resistance value: 4
Ω +/-40%
• Sensor output range: 1.2 ~ 4.0 V
• Total sensor resistance: 4 k
Ω ± 40%
• Total motor resistance: 8.0
Ω ± 0.5Ω
- Check pin for the followings:
• Check sensor reference voltage (5V) - ECU Pin
#A33
• Sensor signal - ECU Pin #A82
• Sensor GND - ECU Pin #A09
- Actions
• Measure the resistance of E-EGR valve sensor.
• Check the sensor and actuator wiring harness.
• Check the unit.
DTC
Trouble
Limp
Home
Mode
Delayed
Engine
Stop
Torque
Reduction
(max.
20%)
Help
Torque
Reduction
(max.
50%)
Immedi-
ately
Engine
Stop
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
8
1792
EXHAUST SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
Engine
Malfunction
Indicator
light
P1409
P1407
P0402
EGR Valve
Circuit Short
Faulty EGR
Close Position
EGR Valve
Stuck in Open
Position
- Check pin for the followings:
• The E-EGR valve wiring is open.
• E-EGR Pin #1: Power(Main Relay)
• E-EGR Pin #5: ECU Pin #A48
- Actions
• Check E-EGR valve wiring.
• Visually check the unit and replace if necessary.
• Refer to DTCs (P0407 and P0408).
- Causes
• The EGR position is not closed when EGR is not
operated within 50 seconds with the engine idling.
- Check pin for the followings:
• E-EGR #1: Valve power (Main relay)
• E-EGR #2: Sensor (Reference voltage) ECU #A33
• E-EGR #4: Sensor (Ground) ECU #A09
• E-EGR #5: Valve drive (PWM) ECU #A48
• E-EGR #6: Sensor (Signal) ECU #A82
- Actions
• Check E-EGR valve and sensor wiring.
• Visually check the unit and replace if necessary.
• Refer to DTCs (P0407 and P0408).
- Causes
• The E-EGR valve is stuck with it open.
- Check pin (refer to the page 1407)
- Actions
• Check E-EGR valve and sensor wiring.
• Visually check the unit and replace if necessary.
• Replace the ECU if required.
• Refer to DTCs (P0407 and P0408).
DTC
Trouble
Limp
Home
Mode
Delayed
Engine
Stop
Torque
Reduction
(max.
20%)
Help
Torque
Reduction
(max.
50%)
Immedi-
ately
Engine
Stop
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