Disassembly and Assembly of Isuzu 4JJ1 Euro 4 N Series Engine Nozzle

 This article introduces the disassembly and assembly of 4JJ1 Euro 4 N Series ISUZU engine nozzle

ISUZU Worldwide Snap-on EPC 2018 Parts Catalog

Legend
1. Cylinder head cover4. Injector
2. Injector clamp5. Injection pipe
3. Injector clamp bolt 6. Injection pipe clip Including the inside of the injector, the holes and gaps 2. Remove the sleeve nut (1) of the injection pipe that are the fuel paths for the fuel system have an from the injector.
extremely precise finish. Therefore, because there is the possibility of damage if foreign material becomes NOTE: mixed in, cover the cap after removing parts, etc. to Do not reuse the injection pipe.
prevent the entry of foreign material.
Removal
1. Remove the cylinder head cover.
Refer to "Cylinder Head Cover"in Section 1B.
Engine Mechanical.

3. Remove the injector.
NOTE: Do not reuse the clip, injector gasket and O-ring.

NOTE:
·The injector ID code identifies the injectors.Do not remove the injector ID codes from the injectors.
.Absolutely never touch the injector solenoids because that can hinder their performance or cause damage.
·Store the removed injector with the cylinder number on it.




· When you replace the injector, use a black pen, etc, to erase the ID code of the replaced cylinder number on the injector ID code label(6) attached to the engine cover(5).

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Legend
1.First cylinder injector ID code
2.Second cylinder injector ID code
3.Third cylinder injector ID code
4.Fourth cylinder injector ID code
5.Engine cover
6.Injector ID code label


Installation
1.Install the O-ring to the injector.
NOTE:
.Apply engine oil to the O-ring when instaling and take care not to damage it.
·Do not reuse the O-ring.
2.Install the injector gasket to the cylinder head.
NOTE:
·Clean any foreign material or dit from the cylinder head and injector before assembling the injector gasket.
·Do not forcibly push the injector gasket into the injector as it will be pushed until it hits the end of the injector during clamp tightening.
·Do not reuse the clip and injector gasket.

3.Install the injector clamp as indicated in the diagram.
·Apply engine oil to the threaded portion and seat surface of the injector clamp bolt.

Legend
1. Injector
2. Injector clamp bolt
3. Injector clamp NOTE: Do not reuse the clip, gasket or O-ring.
4. Install and temporarily tighten the injector, injector clamp, and clamp bolt to the cylinder head.
5. Install the injection pipe.



· Apply engine oil to the injector side sleeve nutthreaded portion of the injection pipe and the O-
ring of the injector.
6. Lightly tighten the sleeve nut with a hand so that it is attached airtight.
7. Tighten the injector clamp bolt at the specified torque.
Tightening torque:26 N-m(2.7 kg-m/20 Ib-ft)
8. Tighten the injection pipe clip at the specified torque.
Tightening torque:8 N-m (0.8 kg-m/69 lb-in)

Legend
1. Injector
2. Clip
9. Tighten the sleeve nut of the injection pipe at the specified torque.
Tightening torque: Injector side:30 N-m(3.1kgm/22 lb-t) Common rail side:25N-m(2.5kg-m/18 Ib-ft)

Legend
1.Clump bolt2.Sleeve nut
10.Record all numbers of each cylinder on the harness connector housing.The correct order for the fuel injector ID codes of the following illustration is as follows:
5E 05 00 FB 00 F7 08 F5 19 FF0449


SUZU -IDSS Diagnostic woftware 

Legend
1. Fuel injector ID code
2. Fuel injector
11. Install the cylinder head cover.
Refer to "Cylinder Head Cover"in Section 1B.
Engine Mechanical.
Programming Fuel Injector ID Codes
1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.


identification>appropriate engine model>
Programming>Injector Programming.
4. In order to get programming approval, the on screen displays a message to user. Get programming approval from the TIS 2000 using the following procedure: a. Connect a scan tool to the terminal that installed TIS 2000 with the latest software and the hardware key is plugged into port.
b. Turn ON the scan tool and keep at title screen.
c. Launch the TIS application.
d. Select the Security Access at the main screen.
e. Highlight the"Tech 2"on the Diagnostic Tool Selection screen and click "Next".
f. Click "Close"on the Security Access Enabled screen.
g. Turn OFF the scan tool.
h. Disconnect the scan tool from the terminal.5. Disconnect the scan tool from the terminal.
6. Tum ON the ignition, with the engine OFF.
7. Select Diagnostics >appropriate vehicle identification>appropriate engine model>
Programming>Injector Programming.
8. Verify the fuel injector ID code on the screen and follow the on screen messages. If not programmed or incorrect fuel injector ID code, input 24 digits of each fuel injector ID code.
9. After complete the programming, turm OFF the ignition for 30 seconds.
10. Start the engine and let idle.
11. Inspect for a proper engine running condition and for no DTC's. Refer to Diagnostic System Check-
Engine Controls if needed.

(a)26N-m(2.7kg-m/20 lbft)
(b)30N-m(3.1kg-m/22 Ib-ft)
(c)25N-m(2.5kg-m/18Ib-ft)
(d)8N-m(0.8kg-m/69lb-in)