Isuzu 4HK-1, Manual, Page: 49 / 50

Clearing the ECM Memory
The engine will not operate properly
unless the ECM memory is cleared.
• Install the vehicle ECM harnesses
and then clear the ECM memory.
Clearing Memory
Clearing Memory is Completed
Clearing ECM Memory
Perform the following steps to clear memory if Vehicle (Construction
equipment/machine) is equipped with ECM. The engine will not operate properly
unless memory is cleared.
Turn the ignition key to ON.
Turn the Diag SW to ON.
Turn the Memory Clear SW to ON.
Wait 5 seconds.
Turn the Memory Clear SW to OFF.
Turn the Diag SW to OFF.
Turn the ignition key to OFF.
Wait 10 seconds. (Do not trun the ignition key to ON.)
Turn the ignition key to ON.
Turn the Diag SW to ON.
Check the engine. (1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
* If the vehicle etc. is not equipped with ECM, install the ECM on the vehicle and
clear the ECM memory.
EMPS
6-xxxxx Copyright © 2006 CNH America LLC All Rights Reserved
Process Menu
Process Menu
Next Exit
ECM Reflash
Injector Replacement
Replace ECM (same model)
Factory Setting
EMP
EMPS (Flash Tool)
Select the machine’s manufacturer and click OK.
OK
SUMITOMO
EMPS
Selecting the Manufacturer
Select SUMITOMO as the
manufacturer for all CNH applications.
Preliminary ELECTRONIC SERVICE TOOL (EST)
Engine Module Programming System (EMPS) - Summary
Selecting an EMPS Process
Select an EMPS operation from the
Process Menu.
• ECM Reflash - Select when the ECM
control program is suspected to have
damaged/corrupted files. This
selection reinstalls the same
operating software files on the ECM
as determined by current Serial
Number listed on the ECM.
• Injector Replacement - Select when
an injector(s) is/are replaced. This
operation provides injector QR Code
information to the ECM to optimize
engine fuel system performance. Refer
to diagram for injector QR Code
locations.
• Replace ECM (same model) -
Select
when the ECM is replaced.
• Factory Setting - Select when the
ECM control program is suspected to
have damaged/corrupted files.
Restores ECM to the factory settings
as determined by a specific Serial
Number.
Factory installed injector QR codes are shown
on the head cover label.
#1 55 00 00 B8 A3 D7 C9 B9 BB E7 A1 D4
#2 55 00 00 B8 A3 D7 C9 B9 BB E7 A1 D4
#3 55 00 00 B8 A3 D7 C9 B9 BB E7 A1 D4
#4 55 00 00 B8 A3 D7 C9 B9 BB E7 A1 D4
#5 55 00 00 B8 A3 D7 C9 B9 BB E7 A1 D4
#6 55 00 00 B8 A3 D7 C9 B9 BB E7 A1 D4
EngNo XXXXXX XXXX XXX
1
2 3
1 : Engine Serial Number
2 : Engine Model
3 : QR Code
Individual injector QR codes are
shown on the top of each injector.