freightliner M2 Plus 2023 Manual page 136

Engine Starting, Operation, and Shutdown
WARNING
When the STOP engine or CHECK engine lamp
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.
In SHUTDOWN mode, the red STOP engine lamp
illuminates when the problem is serious enough to
reduce power or speed. See
ramps down, then the engine shuts down if the
problem continues while in derate mode. The driver
has 30 or 60 seconds (depending on the critical fault
type) after the STOP engine lamp illuminates to
move the vehicle safely off the road. If the vehicle
cannot be moved to a safe location within that time,
turn the ignition switch to OFF for at least five
seconds, then restart the engine. Repeat this action
until the vehicle is safely off the road.
NOTE: In addition to the warning lamp, the
driver display screen presents a warning
message when the engine is in SHUTDOWN
mode. See Fig. 9.5. For vehicles with Detroit
engines only, the time remaining before
shutdown is displayed.
1
07/09/2009
1. Malfunction Indicator Lamp (MIL)
2. CHECK Engine Lamp
3. STOP Engine Lamp
Fig. 9.4, Engine Warning Lamps
Do not operate the vehicle further until the problem
causing the shutdown has been corrected.
Some vehicles may have a shutdown override
switch, which can be used to momentarily override
the shutdown sequence. This switch resets the
shutdown timer, restoring power to the level before
the derate. The switch must be pressed again after
five seconds to obtain a subsequent override. See
Fig. 9.6.
9.5
Fig. 9.4. Engine power
CHECK STOP
2 3
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09/9/2016
Fig. 9.5, Shutdown Alert
03/29/2016
Fig. 9.6, Shutdown Override Switch
NOTICE
When the derate process begins, immediately get
the vehicle serviced in order to prevent severe
damage to the engine.
Detroit engines may begin a warning and derate
process if water is detected in the fuel, or for high
engine coolant temperature. In WARNING and
DERATE mode, the CHECK engine, STOP engine,
or MIL lamp illuminates to indicate an engine
problem that requires service and the engine controls
begin a derate of engine output. Continuing to run
the engine while it is in derate mode may cause
severe damage to the engine.
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