Troubleshooting

18 RENR2696-01
Troubleshooting Section
Each delay between each digit of the code will be
2 seconds.
After one active code has been identified there will
be a delay of 5 s
econds before the next active code
is flashed.
The sequence o
f flashing the active codes may be
restarted at any time by reactivating the cycling of
the keyswitch.
i01798103
Replacing the ECM
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened
component life.
The engine is
equipped with an Electronic Control
Module (ECM). The ECM contains no moving parts.
Follow the troubleshooting procedures in this manual
in order to b
e sure that replacing the ECM will correct
the problem. Verify that the suspect ECM is the
cause of the problem.
Note: Ensure that the ECM is receiving power
and that the ECM is properly grounded before
replacemen
t of the ECM is attempted. Refer to
Troubleshooting, “Electrical Power Supply Circuit -
Test” .
AtestECMcanbeusedinordertodetermineif
the ECM on the engine is faulty. Install a test ECM
in place of
the suspect ECM. Flash the personality
module into the test ECM. Program the parameters
for the test ECM. The parameters must match
the param
eters in the suspect ECM. Refer to the
following test steps for details. If the test ECM
resolves the problem, reconnect the suspect ECM.
Verify th
at the problem returns. If the problem returns,
replace the ECM.
Use the e
lectronic service tool to read the parameters
in the suspect ECM. Record the parameters in the
suspect ECM. The personality module can be flashed
into the
new ECM. After the ECM is installed on the
engine, the parameters must be programmed into
the new ECM.
Note: When a new ECM is not available, you may
need to remove a
n ECM from an engine that is not in
service. The ECM must have the same serial number
suffix. Ensure that the replacement ECM and the
Personality M
odule Interlock Code match the suspect
ECM. Be sure to record the parameters from the
replacement ECM. Use the “Copy Configuration ECM
Replacement
” function in the electronic service tool.
NOTICE
If the Personality Module and engine application are
not matched, engine damage may result.
Perform the following procedure in order to replace
the ECM.
1. Connect the electronic service tool to the service
tool connector.
2. Use the “Copy Configuration ECM Replacement”
function from the electronic service tool. If the
“Copy Configuration” is successful, proceed to
Step 4. If the “Copy Configuration” failed, proceed
to Step 3.
Note: You may want to record any Logged Faults
and Events for your records.
3. Record the parameters. Record all of the
parameters on the “Main Configuration” screen.
Also, record all of the parameters on the
“Throttle Configuration” screen and on the “Mode
Configuration” screen.
Note: If the parameters cannot be read, the
parameters must be obtained elsewhere. Some
parameters are stamped on the engine information
plate, but most parameters must be obtained from
the factory.
4. Remove the ECM.
a. Turn the keyswitch to the OFF position.
b. Turn the battery disconnect switch t o the OFF
position.
c. Slacken the 4 mm Allen head screw and
disconnect the ECM 70-pin (P1/J1) connectors.
d. Remove the mounting bolts from the ECM.
e. Disconnect the grounding strap from the ECM.
5. Install the replacement ECM.
a. Usetheoldmountinghardwaretoinstallthe
replacement ECM. The mounting hardware
should be free of damage.