Engine Diagnostics
i05194988
Self-Diagnostics
Perkins
Electronic
Engines
have
the
capability
to
perform
a
self-diagnostics
test.
When
the
system
detects
an
active
problem,
a
diagnostic
lamp
is
activated.
Diagnostic
codes
will
be
stored
in
permanent
memory
in
the
Electronic
Control
Module
(ECM).
The
diagnostic
codes
can
be
retrieved
by
using
Perkins
electronic
service
tools.
Some
installations
have
electronic
displays
that
provide
direct
readouts
of
the
engine
diagnostic
codes.
Refer
to
the
manual
that
is
provided
by
the
OEM
for
more
information
on
retrieving
engine
diagnostic
codes.
Active
codes
represent
problems
that
currently
exist.
These
problems
should
be
investigated
first.
Logged
codes
represent
the
following
items:
• Intermittent problems
• Recorded events
• Performance history
The problems may have been repaired since the
logging of the code. These codes do not indicate that
a repair is needed. The codes are guides or signals
when a situation exists. Codes may be helpful to
troubleshoot problems.
When the problems have been corrected, the
corresponding logged fault codes should be cleared.
i03554520
Diagnostic
Lamp
A
diagnostic
lamp
is
used
to
indicate
the
existence
of
an
active
fault.
A
fault
diagnostic
code
will
remain
active
until
the
problem
is
repaired.
The
diagnostic
code
may
be
retrieved
by
using
the
electronic
service
tool.
i05421238
Diagnostic
Flash
Code
Retrieval
Use
the
“
DIAGNOSTIC
”
lamp
or
an
electronic
service
tool
to
determine
the
diagnostic
flash
code.
Use the following procedure to retrieve the flash
codes if the engine is equipped with a
“
DIAGNOSTIC
”
lamp:
1.
Move the keyswitch from the on/off two times
within 3 seconds.
A flashing YELLOW lamp indicates a 3-digit code for
the engine. The sequence of flashes represents the
system diagnostic message. Count the first
sequence of flashes in order to determine the first
digit of the flash code. After a two second pause, the
second sequence of flashes will identify the second
digit of the flash code. After the second pause, the
third sequence of flashes will identify the flash code.
For more information refer to Troubleshooting.
i05406659
Fault
Logging
The
system
provides
the
capability
of
Fault
Logging.
When
the
Electronic
Control
Module
(ECM)
generates
an
active
diagnostic
code,
the
code
will
be
logged
in
the
memory
of
the
ECM.
The
codes
that
have
been
logged
by
the
ECM
can
be
identified
by
the
electronic
service
tool.
The
active
codes
that
have
been
logged
will
be
cleared
when
the
fault
has
been
rectified
or
the
fault
is
no
longer
active.
The
following
logged
faults
cannot
be
cleared
from
the
memory
of
the
ECM
without
using
a
factory
password:
Overspeed,
low
engine
oil
pressure,
high
engine
coolant
temperature,
and
aftertreatment
codes.
i03554534
Engine
Operation
with
Active
Diagnostic
Codes
If
a
diagnostic
lamp
illuminates
during
normal
engine
operation,
the
system
has
identified
a
situation
that
is
not
within
the
specification.
Use
electronic
service
tools
to
check
the
active
diagnostic
codes.
Note:
If
the
customer
has
selected
“
DERATE
”
and
if
there
is
a
low
oil
pressure
condition,
the
Electronic
Control
Module
(ECM)
will
limit
the
engine
power
until
the
problem
is
corrected.
If
the
oil
pressure
is
within
the
normal
range,
the
engine
may
be
operated
at
the
rated
speed
and
load.
However,
maintenance
should
be
performed
as
soon
as
possible.
The
active
diagnostic
code
should
be
investigated.
The
cause
of
the
problem
should
be
corrected
as
soon
as
possible.
If
the
cause
of
the
active
diagnostic
code
is
repaired
and
there
is
only
one
active
diagnostic
code,
the
diagnostic
lamp
will
turn
off.
SEBU9063-07
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