Troubleshooting

34 RENR2696-01
Troubleshooting Section
System Configuration
Parameters
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System Configuration
Parameters
System Configuration Parameters affect the
emissions of the engine or the power of the engine.
System configuration parameters are programmed
at the factory. Normally, system configuration
parameters would never need to be changed
through the life of the engine. System configuration
parameters must be reprogrammed if an ECM is
replaced. Unless the engine rating has changed,
system configuration parameters do not need to
be reprogrammed when the Personality Module is
replaced. The correct values for these parameters
are stamped on the engine information ratings plate.
The engine information ratings plate is located on
the valve cover or on the air intake manifold. Factory
passwords are required to change these parameters.
The following information is a description of the
system configuration parameters.
“Full Load Setting”
“Full Load Setting” is a number that represents
the adjustment to the fuel system that was made
atthefactoryinordertofinetunethefuelsystem.
The correct value for this parameter is stamped
on the engine information ratings plate. If the
ECM is replaced, the “full load setting” must
be reprogrammed in order to prevent a 253-02
diagnostic code from becoming active.
“Full Torque Setting”
“Full Torque Setting” is similar to “Full Load Setting”.
If the ECM is replaced, the full torque setting must
be reprogrammed in order to prevent a 253-02
diagnostic code from becoming active.
Rating Interlock
The Rating Interlock is a code that prevents the use
of an incorrect power rating and/or emission rating
for a specific engine. Each horsepower rating and
each emission certification has a different code to all
other horsepower ratings and emission certifications.
When an ECM is replaced this rating interlock code
must match the c
odethatisstoredintheECM.Ifthe
rating interlock code does not match the code that is
stored in the ECM, both of the following situations
will exist:
•
The engine will not run.
•
The diagnostic code 253-02 (Incorrect ECM
Software) will be active.
Note: The flash programming of a new rating
interlock replaces the old rating interlock.
This code does not need to be programmed when
the replacement ECM is from the same engine rating.
If the ECM is from a different engine rating, then
the following components may need to be changed:
pistons, fue
l injectors, and other components.
The engine information ratings plate must also be
changed in order to reflect the new rating.
Some vehicle systems such as the cooling system
or the transmission may also require changes when
the engine i
s rerated. Please contact the local OEM
dealer for further information.
“Engine Serial Number”
WhenanewEC
M is delivered, the engine serial
number in the ECM is not programmed. The “Engine
Serial Number” should be programmed to match the
engine ser
ial number that is stamped on the engine
information plate.
“ECM Software Release Date”
This para
meter is defined by the rating interlock
and this parameter is not programmable. The “ECM
SoftwareReleaseDate”isusedtoprovidethe
version o
f the software. The Customer parameters
and the software change levels can be monitored by
this date. The date is provided in the month and the
year (NOV
99). NOV is the month (November). 99
is the year (1999).