Engine Diagnostics - Perkins 2806A-E18TA Operation And Maintenance Manual

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Operation Section

Engine Diagnostics

Engine Diagnostics
Self-Diagnostics
Perkins Electronic Engines can 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 Perkins
Electronic Service Tool (EST).
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.
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.
Fault Logging
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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been rectified or the fault is no longer active.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.
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
there is a low oil pressure condition, engine power
will be limited 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
i06217559 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.
Operation of the engine and performance of the
engine can be limited as a result of the active
diagnostic code that is generated. Acceleration rates
may be lower. Refer to the Troubleshooting Guide for
more information on the relationship between these
active diagnostic codes and engine performance.
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