Troubleshooting Section
Introduction
i06926304
General Information
Important Safety Information
Do not perform any procedures in this
Troubleshooting Guide until you have read the
Operation and Maintenance Manual and you
understand this information. Use only proper tools
and observe all precautions that pertain to the use of
those tools. Failure to follow these procedures can
result in personal injury. Also, the following
procedures must be observed.
Work safely. Most accidents that involve product
operation, maintenance, and repair are caused by
failure to observe basic safety rules or precautions.
An accident can often be avoided by recognizing
potentially hazardous situations before an accident
occurs.
A person must be alert to potential hazards. This
person should also have the necessary training,
skills, and tools to perform these functions properly.
Safety precautions and warnings are provided in this
publication and on the product. If these hazard
warnings are not heeded, bodily injury or death could
occur to you or to other persons. Perkins cannot
anticipate every possible circumstance that might
involve a potential hazard.
Therefore, the warnings in this publication and the
warnings that are on the product are not all inclusive.
Overview
These engines are equipped with an electronic
control system. The system consists of a computer,
sensors, and software. The system performs these
functions:
• Control of the engine
• Control of the Selective Catalyst Reduction (SCR)
system
• Control of particulate emissions via the Clean
Emission Module (CEM)
• Applications control system interface
• Fault detection and reporting
Electronic Control System
The Electronic Control Module (ECM) is a computer
that controls the operation of the engine.
The ECM contains a flash file. The flash file is the
software for the ECM. The flash file contains the
operating maps. The operating maps define the
following characteristics of the engine:
• Horsepower
• Torque curves
• Engine speed (rpm)
Refer to Troubleshooting, “System Overview” for
additional information on the electronic control
system.
Application Interface
The ECM interfaces with the machine via software
and an electrical connector on the ECM. The
software can be configured.
The application control system provides inputs to the
electrical connector on the ECM to indicate the status
of switches. Correctly configure the ECM to interpret
the inputs.
The ECM provides outputs for the application control
system via the electrical connector to control lamps,
solenoids, and other devices. Correctly configure the
ECM in order for the outputs to match the
configuration of the application control system.
Clean Emissions Module (CEM)
The CEM contains these components:
Diesel Particulate Filter (DPF) (if equipped) – A
DPF may be installed in the exhaust system. The
DPF collects soot and ash from the engine exhaust.
Diesel Oxidation Catalyst (DOC) – A DOC is
installed in the exhaust system. The DOC oxidizes
hydrocarbons (HC), carbon monoxide (CO), odor
causing compounds, and soluble organic fractions
(SOF).
Selective Catalyst Reduction (SCR) System – The
SCR system is used to reduce NOx emissions from
the engine. The SCR system is installed after the
CEM in the exhaust.
Software – Software in the ECM monitors the DPF (if
equipped). The software also controls the amount of
Diesel Exhaust Fluid (DEF) being injected into the
exhaust stream.
UENR4469-36
5
Introduction
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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