Engine Diagnostics
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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 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.
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Diagnostic Lamp
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. The
diagnostic code may be retrieved by using the
electronic service tool. Refer to Troubleshooting ,
“Electronic Service Tools” for more information.
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Diagnostic Flash Code
Retrieval
““Diagnostic”” Lamp
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 three 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.
Any additional flash codes will follow after a pause.
These codes will be displayed in the same manner.
Flash Code 551 indicates that No Detected Faults
have occurred since the ignition keyswitch has been
turned to the ON position.
For further information, assistance for repairs, or
troubleshooting, refer to the Service Manual or
consult your Perkins distributor.
Table3 lists the flash codes and the table also gives a
brief description of the flash codes.
Note: Table3 indicates the potential effect on engine
performance with “ACTIVE” flash codes.
Some codes record events. Also, some codes may
also indicate that a mechanical system needs
attention. Troubleshooting is not required for code
“551” . Code 001 will not display a flash code. Some
codes will limit the operation or the performance of
the engine.
Table3 indicates the potential effect on the engine
performance with active flash codes. Table 3 also
forms a list of Electronic diagnostic codes and
descriptions.
38
SEBU8731-04
Operation Section
Engine Diagnostics
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