SsangYong: Engine Euro 4. Service manual — part 16
INTAKE SYSTEM
1715 / 2330 / 1431
TABLE OF CONTENTS
INTAKE SYSTEM . . . . . . . . . . . . ... 2
1. Intake system layout . . . . . . . . . . . . . . . 2
HFM (HOT FILM AIR MASS) SENSOR
(VERSION 6.0) . . . . . . . . . . . . . . 3
1. Overview and location . . . . . . . . . . . . . . 3
2. Removal and installation HFM sensor . . . . . . . ... 4
THROTTLE BODY . . . . . . . . . . . . .. 5
1. Overview and location . . . . . . . . . . . . . . 5
2. New DTCs for throttle body . . . . . . . . . . . ... 6
3. Removal and installation of throttle body . . . . . . .. 8
BOOST PRESSURE SENSOR . . . . . . . . 9
1. Overview and location . . . . . . . . . . . . . . 9
2. Removal and Installation of boost pressure sensor . . 11
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
2
1715
INTAKE SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
The intake system for the D27DTP (POWER UP) engine is equipped with the throttle body that has a flap to block the air
coming to the engine when the engine is switched off. Therefore, the structure of the intake manifold has been changed.
Also, the improved HFM sensor (from HFM5.0 to HFM6.0) has been installed to control the intake air precisely so
that the NOx in the exhaust gas can be decreased.
1. INTAKE SYSTEM LAYOUT
INTAKE SYSTEM
Intercooler
Turbo charger
Intake manifold
(Throttle body)
Booster Pressure Sensor
Supply power
Ground
O
utput
voltage
Intake Manifold
Com-
pressed
air
Coolant
port
T
o
corresponding
cylinders
EGR gas
Uncompressed air
Compressed air
Throttle body
Intake duct
Intake duct
Normal: flap open
Engine stopped:
flap closed
HFM
S
ensor (ver. 6.0)
Air
coeaner
Turbo
charger
T
em-
perature
sensor
Preten-
sion
graph
VGT T
urbo C
harger
Exhaust
manifold
Inter-
cooler
Air
cleaner
Ex-
haust
gas
VGT control actuator
Ambient air
Air cleaner
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
3
2330
INTAKE 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
1. OVERVIEW AND LOCATION
The HFM (Hot Film Air Mass) sensor is installed on the air intake line between the air cleaner and the intake manifold
and measures the air volume and air temperature coming to combustion chamber.
The engine ECU is used as a basic feedback signal for controlling the EGR. As the E-EGR valve is installed, the
potentiometer in it sends the valve movement to the ECU as a feedback signal.
The HFM sensor of the D27DTP (POWER UP) engine is an upgraded version compared to the one of the D27DT
engine (D27DT: HFM5.0, D27DTP: HFM6.0). Its accuracy and durability is enhanced to measure the intake air
volume and air temperature more precisely. The appearance does not much differ from the previous version, but it
digitalizes the transferred signal for intake air volume for the precise engine control.
For its function and inside structure, refer to the previous version of Service Manual. The followings show the HFM
sensor mounted on the D27DTP (POWER UP) engine and the unit.
HFM (Hot Film Air Mass) SENSOR (version 6.0)
Power
Ground
NTC-AIR
Intake temperature
Intake mass
* Unit connector
Fuse No. 40 (10A)
ENGINE
ECU
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
4
2330
INTAKE SYSTEM
D27DTP/D27DT (EU4) SM - 2006.08
D27DTP/D27DT (EU4)
2. REMOVAL AND INSTALLATION
HFM SENSOR
1. Disconnect the HFM connector.
2. Release the clamp (air cleaner side) on the inlet hose (duct) and disconnect the inlet hose from the HFM.
3. Unscrew two mounting bolts and remove the HFM
sensor.
4. When installing the HFM sensor, be careful not to
damage the O-ring on the HFM sensor.
O-ring
Tightening torque: 6 ~ 7 Nm
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