2007 ISUZU KB P190 Workshop Repair Manual

key battery wipers compression ratio technical data fuel type navigation

Page 1321 of 6020

ISUZU KB P190 2007 Workshop Repair Manual Engine Control System (4JH1) 6E-287
Vehide Speed Sensor (VSS)

RTW 56EMH000301
Legend
1. Vehicle Speed Sensor (VSS) 2W D with A/T
2. Vehicle Speed Sensor (VSS) except 2W D with A/T

Page 1322 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-288 Engine Control System (4JH1)
Fuel Injection System Description

RTW 66EMF000401
Legend
1. Drive Shaft
2. Fuel Feed Pump
3. Pump Camshaft Position (CMP) Sensor
4.

6E-288 Engine Control System (4JH1)
Fuel Injection System Description

RTW 66EMF000401
Legend
1. Drive Shaft
2. Fuel Feed Pump
3. Pump Camshaft Position (CMP) Sensor
4. Fuel Injection Pump Control Unit (PCU)
5. Distributor Head
6. Constant Pressure Valve (CPV) Holder

7. Fuel Injection Solenoid Valve
8. Constran Pressure Valve (CPV)
9. Timing Control Valve (TCV)
10. Timer
11. Radial Plunger

Bosch VP44 Fuel Injection Pump
Instead of the previous face cam type, the radial
plunger distributor type injection pump utilizes a cam
ring to enable fuel injection at high-pressures, marking it
suitable for small, high-speed direct injection diesel
engines. This pump was developed to provide the most
suitable fuel injection quantity and injection timing to
satisfy the demand for engine reliability, driveability, lo
w
smoke, low noise, high output and low exhaust
emissions.
The engine control module (ECM) calculates the
desired fuel injection quantity and timing using data sent
from various sensor s. These desired data are sent to
the fuel injection pump control unit (PCU) via a
controller area network (CAN) communication bus. The
PCU also receives signals from the internal inputs:
pump camshaft position (CMP) sensor that is located
inside the fuel injection pump to determine the cam ring rotation angle and the fuel injection pump speed. The
fuel temperature (FT) sensor is internal the PCU. These
values are used to compare the desired values sent
from the ECM then PCU determines the injection time
r
piston position and fuel injection quantity, and actuates
timing control valve (TCV) & fuel injection solenoid
valve based on control maps in the PCU.
The timing device changes the optimum injection
timing against various engine conditions. The
pressure of the fuel fed from the feed pump is
adjusted and it acts to the timing plunger by TCV
controlled fuel pressure.
(The TCV is installed to the
fuel injection pump rear side and it is controlled by dut
y
ratio cycle from the PCU.) The timing plunger is
connected to the cam ring by a ball pin. Axial
movement of the timing plunger is transferred to the
cam ring in the form of rotational movement.

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ISUZU KB P190 2007

Page 1323 of 6020

ISUZU KB P190 2007 Workshop Repair Manual Engine Control System (4JH1) 6E-289

RTW 66ESH001901
Legend
1. Drive Shaft
2. Feed Pump
3. Pump Camshaft Position (CMP) Sensor
4. Fuel Injection Pump Control Unit (PCU)
5. Di

Page 1324 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-290 Engine Control System (4JH1)
Low Pressure Fuel Circuit Description

RTW 66ESH002101
Legend
1. Fuel Suction
2. Regulating Valve
3. Overflow Valve
4. Feed Pump
5. To Fuel

Page 1325 of 6020

ISUZU KB P190 2007 Workshop Repair Manual Engine Control System (4JH1) 6E-291
Overflow Valve

RTW 66ESH002401
Legend
1. Valve Holder
2. Port
3. To Fuel Tank
4. Orifice Port
5. From Fuel Tank
6. Ball Valve
7. S

Page 1326 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-292 Engine Control System (4JH1)
Radial Plunger

RTW 66ESH002601
Legend
1. Radial Plunger
2. Internal Cam
3. Cam Ring
4. Rotor Shaft
5. Plunger Chamber
6. Roller Shoe
7.

Page 1327 of 6020

ISUZU KB P190 2007 Workshop Repair Manual Engine Control System (4JH1) 6E-293
Fuel Injection Solenoid Valve

RTW 66ESH002801
Legend
1. Valve Seat
2. Valve Closing Direction
3. Valve Needle
4. Coil
5. Magnet
6. Magnet

Page 1328 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E-294 Engine Control System (4JH1)
Timing Control Device Description

RTW 66ESH003001
Legend
1. Cam Ring
2. Servo Valve
3. Timer Piston
4. Outlet
5. Feed Pump
6. Inlet
7. Fu

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