Engine Diagnostics - Perkins 4008-30 Operation And Maintenance Manual

SEBU9077-02

Engine Diagnostics

Self-Diagnostics
For Engines with Electronic
Control Modules Only
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.
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Diagnostic Lamp
For Engines with Electronic
Control Modules Only
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
For Engines with Electronic
Control Modules Only
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been rectified or the fault is no longer active.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, and coolant temperature.
Engine Operation with Active
Diagnostic Codes
For Engine with Electronic Control
Modules Only
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.
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Operation Section
Engine Diagnostics
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