User Manual

Component Identifier (CID) – The CID is a number
that identifies the specific component of the
electronic control system that has experienced a
diagnostic code.
Coolant Temperature Sensor – The coolant
temperature sensor detects the engine coolant
temperature for all normal operating conditions and
for engine monitoring.
Customer Specified Parameters – A customer
specified parameter is a parameter that can be
changed in the ECM with the Electronic Service Tool.
A customer specified parameter's value is set by the
customer. These parameters are protected by
customer passwords.
Data Link – The Data Link is a serial communication
port that is used for communication with other
microprocessor-based devices.
Derate – Certain engine conditions will generate
event codes. Also, engine derates may be applied.
The map for the engine derate is programmed into
the ECM software. The derate can be one or more of
three types: reduction of rated power, reduction of
rated engine speed and reduction of rated machine
speed for OEM products.
Desired Engine Speed – The desired engine speed
is input to the electronic governor within the ECM.
The electronic governor uses the signal from the
throttle position sensor, the engine speed/timing
sensor, and other sensors in order to determine the
desired engine speed.
Diagnostic Trouble Code – A diagnostic trouble
code is sometimes referred to as a fault code. These
codes indicate an electronic system malfunction.
Diagnostic Lamp – A diagnostic lamp is sometimes
called the check engine light. The diagnostic lamp is
used to warn the operator of the presence of an
active diagnostic code. The diagnostic lamps are red
and orange. The lamp may not be included in all
applications.
Diesel Oxidation Catalyst – The Diesel Oxidation
Catalyst is also known as the (DOC). The DOC is a
device in the exhaust system that oxidizes certain
elements in the exhaust gases. These elements can
include carbon monoxide (CO), hydrocarbons and
the soluble organic fraction (SOF) of particulate
matter.
Diesel Particulate Filter – The Diesel Particulate
Filter (DPF) filters particulates from the exhaust
gases. When the particulates have built up on the
internal surfaces of a wall flow DPF, the temperature
of the exhaust gas is raised in order to burn off the
particulates. This regeneration process prevents the
DPF from becoming blocked. The regeneration
process therefore allows the DPF to continue to
operate efficiently. A through-flow DPF does not
require an active regeneration.
Digital Sensor Return – The common line (ground)
from the ECM is used as ground for the digital
sensors.
Digital Sensors – Digital sensors produce a pulse
width modulated signal. Digital sensors are supplied
with power from the ECM.
Digital Sensor Supply – The power supply for the
digital sensors is provided by the ECM.
Direct Current (DC) – Direct current is the type of
current that flows consistently in only one direction.
Duty Cycle – See “Pulse Width Modulation” .
Electronic Engine Control – The electronic engine
control is a complete electronic system. The
electronic engine control monitors the engine
operation under all conditions. The electronic engine
control also controls the engine operation under all
conditions.
Electronic Control Module (ECM) – The ECM is the
control computer of the engine. The ECM provides
power to the electronics. The ECM monitors data that
is input from the sensors of the engine. The ECM
acts as a governor in order to control the speed and
the power of the engine.
Electronic Service Tool – The electronic service
tool is used for diagnosing various electronic controls
and the electronic service tool is also used for
programming various electronic controls.
Engine Monitoring – Engine Monitoring is the part
of the electronic engine control that monitors the
sensors. This also warns the operator of detected
problems.
Engine Oil Pressure Switch – The engine oil
pressure switch measures engine oil pressure. The
switch sends an electronic signal to the ECM that is
dependent on the engine oil pressure.
Engine Speed/Timing Sensor – An engine speed/
timing sensor is a hall effect switch that provides a
digital signal to the ECM. The ECM interprets this
signal as the crankshaft position and the engine
speed. Two sensors are used to provide the speed
and timing signals to the ECM. The primary sensor is
associated with the crankshaft and the secondary
sensor is associated with the camshaft.
Estimated Dynamic Timing – Estimated dynamic
timing is the estimate of the actual injection timing
that is calculated by the ECM.
50 UENR0623-02
Engine Operation
This document has been printed from SPI2. NOT FOR RESALE