The battery disconnect switch and the engine start
switch perform different functions. The entire
electrical system is disabled when you turn the
battery disconnect switch to the OFF position. The
battery remains connected to the electrical system
when you turn the engine start switch to the OFF
position.
Turn the battery disconnect switch to the OFF
position and remove the key when you service the
electrical system or any other engine components.
Turn the battery disconnect switch to the OFF
position and remove the disconnect switch key after
you operate the engine. This will prevent the battery
from being discharged. The following problems can
cause battery discharge:
• short circuits
• current draw via some components
• vandalism
i07201665
Selective
Catalytic
Reduction
Warning
System
The
selective
catalytic
reduction
(SCR)
system
is
a
system
used
to
reduce
NOx
emissions
from
the
engine.
Diesel
exhaust
fluid
(DEF)
is
pumped
from
the
DEF
tank
and
is
sprayed
into
the
exhaust
stream.
The
DEF
reacts
with
the
SCR
catalyst
to
reduce
NOx
and
leaves
a
nitrogen
and
water
vapor.
The
engine
and
emissions
control
system
shall
be
operated,
used,
and
maintained
in
accordance
with
the
instructions
provided
to
the
end
user
to
maintain
the
emissions
performance
of
the
engine
within
the
requirements
applicable
to
the
engine's
category.
No
deliberate
tampering
with
or
misuse
of
the
engine
emissions
control
system
should
take
place.
In
particular
regarding
deactivating
or
not
maintaining
the
SCR
system.
NOTICE
Stopping the engine immediately after the engine has
been working under load can result in overheating of
SCR components.
Refer to the Operation and Maintenance Manual,
“Engine Stopping” procedure to allow the engine to
cool. Refer to the Operation and Maintenance Man-
ual, “Engine Stopping” procedure to prevent exces-
sive temperatures in the turbocharger housing and
the DEF injector.
NOTICE
Allow at least 2 minutes after shutting down the en-
gine before you turn the battery disconnect switch to
OFF. Disconnecting the battery power too soon will
prevent purging of the DEF lines after the engine is
shut down.
Definitions
Observe the following definitions.
Self-correct
– Fault condition no longer exists. An
active fault code will no longer be active.
Notification
– Action taken by the system to alert the
operator of pending Inducement.
Inducement
– Engine derates, vehicle speed limits,
or other actions intended to prompt the operator to
repair or maintain the emission control system.
Inducement Categories
– The Inducements are
separated into categories. DEF Levels have
inducement fault codes separate from the other
inducement categories. DEF level inducements are
based on the DEF level, the other inducement
categories are based on escalating time. The
escalating time inducements will always have an
associated fault code along with the inducement fault
code. The associated fault is the root cause. The
escalating time inducement fault code is just an
indicator of what level of inducement the engine is in.
The escalating time inducement fault code also
indicates how much time remains until the next level
of inducement. There are three inducement
categories (two for European Union) that will trigger
an escalating time inducement fault code.
Note:
The associated codes for each of the
escalating time categories can be found in the
Troubleshooting Guide under SCR Warning System
Problem.
First occurrence
– When an escalating time
inducement fault code becomes active for the first
time.
Repeat occurrence
– When any escalating time
inducement fault code becomes active again within
40 hours of the first occurrence. Engine must run for
40 hours without tripping any escalating time
inducement fault before returning get back to first
occurrence times.
Safe Harbor Mode (Worldwide)
– Safe Harbor
Mode is a 20 minute engine run time period. During
the
Safe Harbor Mode
the engine can be operated
with full power after reaching a level 3 inducement.
Once in level 3 inducement, the operator can perform
a key cycle and the engine will enter Safe Harbor
Mode. Safe Harbor Mode can only be implemented
once. Safe Harbor Mode is not allowed for DEF level
inducements with Worldwide configuration.
40
M0087475-03
Operation Section
Selective Catalytic Reduction Warning System