2007 ISUZU KB P190 Workshop Repair Manual

remote start relay catalytic converter engine overheat CD player oil capacity

Page 1329 of 6020

ISUZU KB P190 2007 Workshop Repair Manual Engine Control System (4JH1) 6E-295
The timing control valve (TCV) acts as a variable
throttle, using the rapid opening and closing (cycling)
of the valve needle in the TCV.
At normal operation,
t

Engine Control System (4JH1) 6E-295
The timing control valve (TCV) acts as a variable
throttle, using the rapid opening and closing (cycling)
of the valve needle in the TCV.
At normal operation,
the TCV controls the pressure acting on the annula
r
chamber so that the hydraulic stopper cam move to
any position, from the retard position to the advance
position. At this time, the duty ratio is set by the fuel
injection pump control unit (PCU).

When control current flows to the TCV coil, the valve
needle opens and the fuel annular chamber flows
through the orifice to the feed pump inlet.
Consequently, the pressure of the annular chambe
r
decreases and the hydraulic stopper is moved to the
retard side.

When control current to the TCV coil is cut, the valve
needle closes and the return passage is closed.
Consequently, the pressure of the annular chambe
r
increases and the hydraulic stopper is moved to the
advance side.

Pump Camshaft Position (CMP) Sensor

RTW 66ESH003301
Legend
1. Pump Camshaft Position (CMP) Sensor
2. Flexible Connecting Harness
3. Drive Shaft
4. Pump Camshaft Position (CMP) Sensor Retaining Ring
5. Sensor W heel

W hen the drive shaft rotates, the pump camshaft
position (CMP) sensor receives signal form the senso
r
wheel, and an electric pulse is sent through the flexible
connecting harness to the fuel injection pump control
unit (PCU). From these signals the PCU can determine
the average pump speed and the momentary pump
speed. The pump CMP sensor is mounted to the cam
ring. Thus, the relationship between the cam ring and
the pump CMP sensor signal is constant. The pump
CMP sensor signal is utilized for the following purposes:
• To determine the momentary angular position o
f
the cam ring.
• To calculate the actual speed of the fuel injection
pump.
• To determine the actual timing plunger position.

RTW 66ESH003401Legend
1. Pump Camshaft Position (CMP) Sensor Signal
2. Crankshaft Position (CKP) Sensor Signal
3. Fuel Injection Solenoid Valve Control Pulse
4. Fuel Injection Solenoid Needle Valve Lift
5. Cam Lift (Cam Profile)
6. Pulse Count
7. Fuel Injection Solenoid Valve Close
8. Fuel Injection Solenoid Valve Open
9. Start of Pressure Delivery
10. End of Pressure Delivery
11. Pressure Delivery Angle
12. Effective Stroke

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ISUZU KB P190 2007

Page 1330 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-296 Engine Control System (4JH1)
• Momentary Cam Ring Angular Position
The momentary angular position of the cam ring is input into the fuel injection PCU as a fuel injection
solenoid valv

Page 1331 of 6020

ISUZU KB P190 2007 Workshop Repair Manual Engine Control System (4JH1) 6E-297
Exhaust Gas Recirculation (EGR) System Description

RTW 66ELF000101
Legend
1. EGR Cooler
2. Engine Coolant Outlet
3. Engine Coolant Inlet

Page 1332 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-298 Engine Control System (4JH1)
Turbocharger Description

RTW 66EMF000501
Legend
1. Exhaust Gas
2. W astegate Valve
3. Turbine W heel
4. Compressor W heel
5. Air Clean

6E-298 Engine Control System (4JH1)
Turbocharger Description

RTW 66EMF000501
Legend
1. Exhaust Gas
2. W astegate Valve
3. Turbine W heel
4. Compressor W heel
5. Air Cleaner

6. Vacuum Pressure Sensor
7. Engine Control Module (ECM)
8. Turbocharger Solenoid Valve
9. Vacuum Pump (ACG)
10. Change Air Cooler (Intercooler)
The turbocharger is used to increase the amount of ai
r
that enters the engine cylinders. This allows a
proportional increase of fuel to be injected into the
cylinders, resulting in increased power output, more
complete combustion of fuel, and increased cooling o
f
the cylinder heads, pistons, valves, and exhaust gas.
This cooling effect helps extend engine life.
Heat energy and pressures in the engine exhaust gas
are utilized to drive the turbine. Exhaust gas is directed
to the turbine housing. The turbine housing acts as a
nozzle to direct the shaft wheel assembly. Since the
compressor wheel is attached directly to the shaft, the
compressor wheel rotates at the same speed as the
turbine wheel. Clean air from the air cleaner is drawn
into the compressor housing and wheel. The air is
compressed and delivered through a crossover pipe to
the engine air intake manifold, then into the cylinders.
The amount of air pressure rise and air volume
delivered to the engine from the compressor outlet is
regulated by a wastegate valve in the exhaust housing.
The position of the wastegate valve is controlled by the
amount of pressure built up on the intake side of the
turbocharger. The diaphragm on the inside of the
wastegate is pressure sensitive, and controls the
position of the valve inside the turbocharger. The
position of the valve will increase or decrease the
amount of boost to the turbocharger.
The charge air cooler also helps the performance of the
diesel. Intake air is drawn through the air cleaner and
into the turbocharger compressor housing. Pressurized
air from the turbocharger then flows forward through the
charge air cooler located in the front of the radiator.
From the charge air cooler, the air flows back into the
intake manifold.
The charge air cooler is a heat exchanger that uses ai
r
flow to dissipate heat from the intake air. As the
turbocharger increases air pressure, the air temperature
increases. Lowering the intake air temperature
increases the engine efficiency and power by packing
more air molecules into the same space.

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ISUZU KB P190 2007

Page 1333 of 6020

ISUZU KB P190 2007 Workshop Repair Manual Engine Control System (4JH1) 6E-299
Special Tools and Equipment
Special Tools and Equipment
Illustration Tool Number/
Description
Illustration Tool Number/
Description
5-8840-2835-0 /
J

Page 1334 of 6020

ISUZU KB P190 2007 Workshop Repair Manual

SECTION 6F
EXHAUST SYSTEM
TABLE OF CONTENTS
PAGE
Main Data and Specifications ........................................................................................... 6F - 2
General De

SECTION 6F
EXHAUST SYSTEM
TABLE OF CONTENTS
PAGE
Main Data and Specifications ........................................................................................... 6F - 2
General Description .......................................................................................................... 6 F - 3
Removal and Installation .................................................................................................. 6F - 4
Inspection and Repair ....................................................................................................... 6F - 6
General Description .......................................................................................................... 6 F -7
EGR System Diagram........................................................................................................ 6F 9
Inspection ..................................................................................................................... ..... 6F-11
EGR Cooler (4JA1TC/4JH1TC Euro-III model)................................................................. 6F-12
Turbocharger ................................................................................................................... .. 6F -15
Main Data and Specifications....................................................................................... 6F -15
General Description .......................................................................................................... 6 F -16
Inspection and Repair ....................................................................................................... 6F -17
Special Tools .................................................................................................................. ... 6F -19
IHI Service Network ........................................................................................................... 6F -20
EXH
AU ST SY STEM 6F – 1

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ISUZU KB P190 2007

Page 1335 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6F – 2 EXHAUST SYSTEM

MAIN DATA AND SPECIFICATIONS

Front pipe

Pipe outside diameter x thickness mm (in) 50.8 x 1.5 (2.0 x 0.059)

For EC model, catalitic converter is

combi

Page 1336 of 6020

ISUZU KB P190 2007 Workshop Repair Manual EXHAUST SYSTEM 6F – 3
GENERAL DESCRIPTION

RTW 46FLF000201

The exhaust pipe layout is described in the above illustration.
The catalytic coverter is installed between the tur

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