12 KENR6908
Troubleshooting Section
i02822887
Replacing the ECM
NOTICE
Keep all parts clean from contaminants.
Contaminants m
ay cause rapid wear and shortened
component life.
The Electronic Control Module (ECM) contains no
moving parts. Replacement of the ECM can be
costly. Replacement can also be a time consuming
task. Follow the troubleshooting procedures in this
manual in order to ensure that replacing the ECM will
correct the fault. Verify that the suspect ECM is the
cause of the fault.
Note: Ensure that the ECM is receiving power and
that the ECM is properly wired to the negative battery
circuit before a replacement of the ECM is attempted.
Refer to Troubleshooting, “Electrical Power Supply
Circuit - Test”.
AtestECMcanbeusedtodetermineiftheECMis
faulty. Install a test ECM in place of the suspect ECM.
Flash program the correct flash file into the test ECM.
Program the parameters for normal operation of the
engine. The parameters must match the parameters
in the suspect ECM. Refer to the following test steps
for details. If the test ECM resolves the fault, connect
the suspect ECM. Verify that the fault returns. If the
fault returns, replace the suspect ECM.
Note: When a new ECM is not available, you may
need to remove an ECM from an engine that is not
in service. The interlock code for the replacement
ECM must match the interlock code for the suspect
ECM. Be sure to record the parameters from the
replacement ECM on the “Parameters Worksheet”.
Use the “Copy Configuration/ECM Replacement”
feature that is found under the “Service” menu on
the electronic service tool.
NOTICE
If the flash file and engine application are not matched,
engine damage may result.
Perform the following procedure in order to replace
the ECM:
1. Record the configuration data:
a. Connect the electronic service tool to the
diagnostic connector. Refer to Troubleshooting,
“Electronic Service Tools”.
b. Print the parameters from the “Configuration”
screen on the el
ectronic service tool. If a printer
is unavailable, record all of the parameters.
Make a note of any logged diagnostic codes
and logged eve
nt codes for your records.
c. Use the “Copy Configuration/ECM
Replacement
” feature that is found under the
“Service” menu on the electronic service tool.
Select “Load from ECM” in order to copy the
configuratio
ndatafromthesuspectECM.
Note: If the “Copy Configuration” process fails and
the paramete
rs were not obtained in Step 1.b, the
parameters must be obtained elsewhere. Some of the
parameters are stamped on the engine information
plate. Most
of the parameters must be obtained from
the factory.
2. Remove the E
CM:
a. Turn the keyswitch to the OFF position.
b. Disconnect the P1 and P2 connectors from the
ECM.
c. Disconnect the ECM ground strap.
d. Remove the m
ounting bolts from the ECM.
3. Install the replacement ECM:
a. Usetheoldmountinghardwaretoinstallthe
replacement ECM.
b. Connect the ECM ground strap.
c. Connect th
e P1 and P2 connectors. Tighten
the ECM connector (allen head screw) to
the proper torque. Refer to Troubleshooting,
“Electric
al Connectors - Inspect” for the correct
torque value.
4. Configure t
he replacement ECM:
a. Flash program the flash file into the ECM. Refer
to Troubl
eshooting, “Flash Programming” for
the correct procedure.
b. Use the el
ectronic service tool to match the
engine application and the interlock code if
the replacement ECM was used for a different
applica
tion.
c. If the “Copy Configura tion” process from
Step 1.c
was successful, return to the “Cop y
Configuration/ECM Replacement” screen on
the electronic service tool and select “Program
ECM”.
This document has been printed from SPI². Not for Resale
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