Operation and Maintenance Manual

32 SEBU8180-01
Operation Section
Features and Controls
Theenginecanbe programmed to the following
modes:
“Warning”
Sensors and Electrical
Components
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The “Warning” lamp and the warning signal (orange
lamp) turn “ON” and the warning signal is activated
continuously in order to alert the operator that one or
more of the engine parameters is not within normal
operating range.
“Warning/Derate”
The “Diagnostic” lamp turns “ON” and the warning
signal (red lamp) is activated. After the warning, the
engine power will be derated. The warning lamp will
begin to flash when the derating occurs.
SMCS Code: 1900; 7400
Sensor Locations
Illustration 26 shows the typical locations of the
sensors and the ECM on the engine. Specific engines
may appear different from the illustration due to
differences in applications.
The engine will be derated if the engine exceeds
preset operational limits. The engine derate is
achieved by restricting the amount of fuel that is
available for each injection. The amount of this
reduction of fuel is dependent on the severity of the
fault that has caused the engine derate, typically up
to a limit of 50%. This reduction in fuel results in a
predetermined reduction in engine power.
“Warning/Derate/Shutdown”
The “Diagnostic” lamp turns “ON” and the warning
signal (red lamp) is activated. After the warning,
the engine power will be derated. The engine will
continue at the rpm of the set derate until a shutdown
of the engine occurs. The engine can be restarted
after a shutdown for use in an emergency.
Ashutdown of the engine may occur in as little
as 20 seconds. The engine can be restarted after
ashutdownforuseinanemergency.However,
the cause of the initial shutdown may still exist.
The engine may shut down again in as little as 20
seconds.
If there is a signal for low oil pressure or for coolant
temperature, there will be a two second delay in
order to verify the condition.
For each of the programmed modes, refer to
Troubleshooting Guide, “Indicator Lamps” for more
information on Indicator Lamps.
For more information or assistance for repairs,
consult your Caterpillar dealer.