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.
i04907245
Diagnostic
Flash
Code
Retrieval
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.
2.
The shutdown warning lamp will flash once.
3.
A flashing YELLOW lamp indicates a 3-digit
diagnostic 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.
4.
After the diagnostic codes have been displayed,
the shutdown lamp will flash twice and the
indicator lamp will start to flash the logged
diagnostic codes.
5.
After the logged diagnostic codes have been
displayed, the shutdown lamp will flash three times
in order to indication that the code sequences
have finished.
Note:
If there are no diagnostic codes or logged
diagnostic codes, the system will flash the code 551.
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.
M0125147
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