Engine Protection—Warning
and Shutdown
WARNING
When the red STOP engine or engine protection
light illuminates, most engines are programmed
to shut down automatically within 30 seconds.
The driver must immediately move the vehicle to
a safe location at the side of the road to prevent
causing a hazardous situation that could cause
bodily injury, property damage, or severe damage
to the engine.
The driver should be familiar with the vehicle warning
system, in order to bring the vehicle to a safe stop if
the engine malfunctions. If the driver doesn’t under-
stand how the warning system works, an engine
shutdown could occur, causing a safety hazard.
If the engine coolant temperature, the coolant level,
the engine oil pressure, or exhaust aftertreatment
system (on some engines, the engine oil tempera-
ture, or the intake air temperature) reach preset lev-
els, the engine will begin a warning and shutdown
process. See the engine manufacturer’s operation
manual for specific details for your vehicle. See
Chapter 11 in this manual, for the warning and shut-
down modes associated with the exhaust aftertreat-
ment system.
Electronic engine protection is programable as an
option, and can be specified as the following; DER-
ATE, and SHUTDOWN mode (factory default),
WARNING mode, or OFF mode.
In the DERATE and SHUTDOWN mode, the red
stop-engine light will illuminate when the problem is
serious enough to reduce the power or speed. The
engine power will ramp down, then shut down, if the
problem continues. The driver has 30 seconds after
the stop-engine light illuminates, to move the vehicle
safely off the road. If the vehicle cannot be moved to
a safe location within that time, the engine can be
restarted by turning the ignition switch to the OFF
position for at least 5 seconds, then back ON. This
action can be repeated until the vehicle is safely off
the road. See
Fig. 10.1.
Some vehicles may have a shutdown-override
switch, which may be used to override the shutdown
sequence. This switch resets the shutdown timer,
restoring power to the the level before the derate
was initiated. The switch must be pressed again after
5 seconds to obtain a subsequent override. It can be
used to move the vehicle to a safe stopping area. Do
not operate the vehicle until the problem has been
corrected. See
Fig. 10.2.
If the engine protection parameters are set to
WARNING, it warns the driver; the amber, check-
engine light will flash, and a buzzer will sound. The
engine electronics log the event for diagnostic pur-
poses. The check-engine light will go out if the prob-
lem stops.
If the engine protection parameters are set to OFF
mode, the individual sensor indicator lights will illumi-
nate if a problem exists, but no shutdown action will
be started, and the event will not be recorded.
Engine Idle Limiting
Idle Shutdown Timer
This feature is an optional 1-to-100 minute idle shut-
down system. Its purpose is to conserve fuel by
eliminating excessive idling, and allowing a turbo-
charger cool-down period. To activate the shutdown,
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123
CHECK
STOP
1. Malfunction Indicator Lamp (MIL)
2. Check-Engine Light
3. Stop-Engine Light
Fig. 10.1, Engine Warning Lights
08/13/2009
f611040
Fig. 10.2, Shutdown Override Switch
Optional Engine Systems
10.1
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