SsangYong: Engine Euro 4. Service manual — part 23
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
17
1913
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. Lift up the vehicle and disconnect the vacuum hose
from VGT turbocharger.
4. Unscrew the lower mounting bolt and remove the
oil supply pipe.
5. Remove the support bar and the oil return pipe from VGT turbocharger.
Oil Return Pipe
Tightening torque: 10 ± 1.0 Nm
Tightening torque
23 ± 2.3 Nm
Support bar: Tightening torque: 23 ± 2.3 Nm
Upper
Lower
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
18
1913
EXHAUST SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
6. Remove three mounting nuts from VGT turbocharger.
Tightening torque: 25 ± 2.5 Nm
7. Remove the VGT turbocharger assembly.
Tightening torque: 25 ± 2.5 Nm
Lower Nut (2EA)
Note
Actuator for controlling
vane angle
Upper Nut (1EA)
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
19
2433
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
VACUUM MODULATOR FOR CONTROLLING VGT
TURBOCHARGER ACTUATOR
1. OVERVIEW AND SYSTEM LAYOUT
For the D27DTP (POWER UP) engine, the vacuum modulator for controlling EGR valve has been deleted and only
the vacuum modulator for controlling VGT turbocharger actuator is used.
System Layout
D27DTP Engine
D27DT Engine
vacuum pump
VGT Turbocharger vacuum modulator
Vacuum
modulator for
EGR valve
Vacuum pump
connection hose
EGR valve
Turbocharger actuator
connection hose
Vacuum pump
WGT turbocharger
vacuum modulator
Vacuum Modulator for Controlling
WGT Turbocharger Actuator
Engine ECU NO.95
Fuse No.39 (15A)
Turbocharger
actuator hose
Vacuum Modulator for EGR Valve
Engine ECU No.96
Fuse No.39 (15A)
Vacuum Modulator for Controlling
VGT Turbocharger Actuator
Engine ECU
No.A71
Fuse No.40
(10A)
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
20
2433
EXHAUST SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
Operating Principle of Vacuum Modulator
According to the signals from ECU, the solenoid valve regulates the vacuum pressure by vertical movement of
plunger to operate the VGT turbocharger actuator. The plunger is moved by the vacuum pressure (-900 ± 20 mbar)
from the vacuum pump (PWM control type).
The vacuum modulator of D27DTP (Power Up) engine is very similar to that of D27DT
engine. Refer to “DI Engine Service Manual for Rexton”.
Air flow
Duty up (B)
Duty decreased (B)
Diaphram
Seat assembly
Spring
Plunger
Normal condition (A)
Vacuum control
Atmospheric pressure
Output vacuum
Ambient air
Plunger
Connector
Vacuum pump
* The vacuum pressure is adjusted according to the pressure of nipple cover chamber
(I) and the magnetic force (II) of plunger.
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