Operation and maintenance manual

46 SEBU8601-01
Operation Section
Engine Diagnostics
Engine Diagnostics
i02651093
Self-D iagn ost ics
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 the electronic service tool. Refer to
Troubleshooting , “Electronic Service Tools” for
further information.
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. Alternatively refer to
Troubleshooting , “Indicator Lamps” for further
information.
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.
i02651107
Diagnostic Lam p
A diagnostic lamp is used to indicate the existence of
an
active fault. Refer to Troubleshooting , “Indicator
Lamps” for more information. A fault diagnostic
code will remain active until the problem is repaired.
T
he diagnostic code may be retrieved by using the
electronic service tool. Refer to Troubleshooting ,
“Electronic Service Tools” for more information.
i04036139
Diagnostic Flas h Code
Retrieval
In order to read the diagnostic flash codes through
the diagnostic lamp, cycle the key switch from off to
on twice wit
hin 3 seconds.
The codes will be flashing in sequence. For example
if the flash c
ode equals 133, the diagnostic lamp will
flash once, pause, flash three times, pause, and flash
three times.
After the complete code has flashed, a 3 second
pause will take place before the next code will begin
to fl ash (if
another code is present).
Note: For more information refer to
Troubles
hootingmanual.