Isuzu N-Series. Service manual - part 529

6C-24   Fuel System

Legend

1. EGR Adapter
2. EGR Valve Gasket
3. EGR Valve
4. EGR Valve Gasket

 

20. Attach the engine harness connectors. Each

composite connector should make a loud click
when it is securely attached.

Fuel Injector ID Code Data Programming Procedure

1. Install the Tech 2.
2. Turn ON the ignition, with the engine OFF.
3. Select Diagnostics > appropriate vehicle

identification > 4HK1 (Common Rail) >
Programming > Injector ID Code > ID Code
Registration.

4. Select replaced cylinder and press Change. Input

22 figures. Then, input in order from the left edge
of upper sequence to the right sequence. The
correct order for the fuel injector ID code for the
following illustration is as follows:
56 00 D1 CA 00 00 EC 00 23 14 21

Important:
The number of places required for input is 22 figures
except last 2 figures.

Legend

1. Fuel Injector ID Plate
2. Fuel Injector ID Code
3. Fuel Injector

5. After complete the registration, turn OFF the

ignition for 30 second.

6. Turn ON the ignition.
7. Select Diagnostics > appropriate vehicle

identification > 4HK1 (Common Rail) >
Programming > Injector ID Code > Injector ID
Code. At this point, all registered fuel injector ID
code data can be verified. Compare the ID code
values registered into the ECM and each fuel
injector including the last 2 figures. If the registered
ID code is incorrect, go back to Step 4 ID Code
Registration.

8. Start the engine and let idle.
9. Inspect for a proper engine running condition and

for no DTC’s. Refer to the Diagnostic System
Check-Engine Controls if needed.

Notice:
After replacement of the fuel injector, perform the
following procedure.
All fuel injectors are replaced:
Remove the fuel injector ID code label on the cylinder
head cover.
Any fuel injector(s) is replaced:
Blackout the replaced cylinder fuel injector ID code on
the cylinder head cover with a marking pen or
equivalent.

N6A6371E

D1CA

EC00
2100

B7

5600

0000
2314

0000

1

2

3

N6A6525E

Fuel System   6C-25

Torque Specifications

Special Tool

N6A6656E

Illustration

Tool Number / 

Description / Remarks

5-8840-0019-0 (J-23907)

Sliding Hammer

5884000190

5-8840-2826-0 

(EN-46720)

Fuel Injector Remover

Illustration

Tool Number / 

Description / Remarks

EN46720

6C-26   Fuel System

Fuel Supply Pump

Components

Legend

1. Fuel Leak-off Pipe
2. Fuel Pipe
3. Fuel Supply Pump
4. O-ring

5. Bracket
6. Bracket O-ring
7. Drive Gear
8. Oil Drain Adapter

 

The fuel system consists of many tiny holes and
spaces that allow the movement of fuel from one place
to another. These holes and spaces are milled to
extremely high precision. This is especially true of the
fuel injectors.
The fuel injector is very sensitive to foreign material.
Foreign material will result in fuel system breakdown.
Exercise great care not to allow the entry of foreign
material into the fuel system or fuel injectors during the
removal and installation procedure.

Important:
The Fuel supply pump must be timed to the engine.

Removal

1. Remove the intake pipe and the intake throttle

valve.

2. Remove the fuel pipe and fuel leak-off pipe.

3. Remove the fuel feed hose.

N6A6373E

N6A6374E

Fuel System   6C-27

4. Disconnect the fuel temperature sensor and the

fuel rail pressure regulator harness connector from
the fuel supply pump.

5. Remove the fuel supply pump attachment bolts

and nuts, then remove the fuel supply pump.

Notice:
One of the attachment bolt (1) secures the fuel supply
pump to the flywheel housing as denoted in the picture
below.

6. Use a gear puller to remove the fuel supply pump

gear and the O-ring.

7. Loosen the 3 bolts holding the fuel supply pump

bracket. Remove the bracket and the O-ring.

Legend

1. Fuel Supply Pump
2. O-ring
3. Fuel Supply Pump Bracket

 

Installation

1. Install the O-ring to the fuel supply pump.
2. Install the pump to the bracket and tighten the 3

bolts to the specified torque.

Tighten:

Bolts to 19 N

⋅m (1.9 kg⋅m/14 lb⋅ft)

Caution:
Take care not to twist the O-ring.

Legend

1. Fuel Supply Pump
2. O-ring
3. Fuel Supply Pump Bracket

 

N6A6375E

N6A6376E

N6A6377E

N6A6377E