SsangYong: Engine Euro 4. 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