Isuzu 2008MY N Series User Manual

1A-372 Engine Control System (4HK1)
Repair Instructions
Engine Control Module (ECM)
Replacement
Description
The following A - E steps provide an overview
procedure to replace and reprogram an ECM. Each A -
E steps is explained further in this section.
A-1. Uploading Fuel Injector ID Code (Except Euro
4 Specification)
The current fuel injector ID code data can be uploaded
with a scan tool. If the old ECM cannot be
communicated with a scan tool, go to Retrieving the
Fuel Injector ID Code Data with a Non-communicating
ECM.
1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. Select Diagnostics > appropriate vehicle
identification > 4HK1 > Programming > Injector ID
Code < Upload ID Code.
4. After compete the uploading, turn OFF the scan
tool.
5. Turn OFF the ignition.
A-2. Recoding Fuel Injector ID Code
Each fuel injector is designated with 24 hexadecimal
characters (0 - 9 or A - F) that MUST be programmed
into the ECM for correct engine fueling for each specific
cylinder. These characters can be retrieved in one of
following places:
Retrieving the Fuel Injector ID Code Data from the
ECM
The current fuel injector ID code data can be
determined with a scan tool. If the ECM does not
communicate with a scan tool, go to the next
procedure.
1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. Select Diagnostics > appropriate vehicle
identification > 4HK1 > Additional Functions >
Display Injector Codes.
4. Record 24 digits of each fuel injector ID code.
5. After complete the recording, turn OFF the scan
tool.
6. Turn OFF the ignition.
Retrieving the Fuel Injector ID Code Data with a
Non-communicating ECM
If a scan tool does not communicate, the fuel injector ID
codes must be recorded from the factory affixed label
on the cylinder head cover or each fuel injector ID
plate.
Recording from the label on cylinder head cover
Notice: Only perform this procedure if the fuel injectors
are not being replaced in the past.
1. Record all numbers of each cylinder on the label.
Legend
1. Cylinder #1 fuel injector ID code
2. Cylinder #2 fuel injector ID code
3. Cylinder #3 fuel injector ID code
4. Cylinder #4 fuel injector ID code
5. Injector ID code label
A-1. Upload the fuel injector ID codes from the old
ECM (Except Euro 4 specification).
A-2. Record the fuel injector ID codes manually from
the old ECM.
B. Replace the old ECM with the new ECM.
C. Program the latest software and calibrations
into the new ECM using the Service
Programming System (SPS).
D-1. Program the uploaded fuel injector ID codes
and program the vehicle identification number
(VIN) into the ECM (Except Euro 4
specification).
D-2. Program the recorded fuel injector ID codes
and the VIN into the ECM using a scan tool
programming function.
E. Perform the fuel supply pump relearn
procedure by allowing the engine to idle in Park
or Neutral until normal operating temperature is
achieved.
LNW81ASH000101
1
2
3
4
5
4HK1
64
64
64
64
FB
0B
CB
21
00
08
1A
17
00
10
00
16
0A
2B
2F
2B
00
28
3C
3A
04
1E
29
2D
F4
26
3D
4A
F0
17
FF
14
00
16
27
25
01
31
5A
65
94
7C
F0
66
SAMPLE
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Isuzu 2008MY N Series Specifications

General

Brand	Isuzu
Model	2008MY N Series
Category	Control Systems
Language	English