588 10 TERMINOLOGY
EVRT® electronic controlled turbocharger –
International’s version of a Variable Geometry
Turbocharger (VGT).
EZ-Tech® inerface cable – The EZ-Tech® inerface
cable connects to the EST to commu nicate with the
Electronic Controlled M odule (ECM).
Fault detection and management – An alternate
control strategy that reduces adverse effects that can
be caused by a sys tem failure. If a sensor fails, the
ECM substitutes a good sensor signal or assumed
sensor value in its place. A lit a mber or red instrument
panel lamp signals that the vehicle needs service.
Filter restrictio n – A blockag e, usually fro m
contaminants, that prevents the flow of fluid through
a filter.
Flash code – See Diagnostic Trouble Code (DTC).
Fuel inlet restriction – A blockage, usually from
contaminants, that prevents the flow of fluid through
the fuel inlet line.
Fuel pressure – The force that the fuel exerts on the
fuel system as it is pumped through the fuel system.
Fuel strainer – Aprefilter in the fuel system that
keeps larger contaminants from entering the fuel
system.
Fully equipped engine – A fully equipped engine
is an engine equipped with only those accessories
necessary to perform its intended service. A fully
equipped engine does not include components
that are used to power auxiliary systems. If these
components are integral with the engine or for any
reason are included on the test engine, the power
absorbed may be determined and add to the net
brake p ower. (SAE J1995 JUN90)
Fusible link (fuse link) – A fu sible link is a spec ial
section of low tension cable designed to open the
circuit when subjected to an extreme current overload.
(SAE J1156 APR86)
Gradeability – The maximum percent grade which
the vehicle can transverse for a specified time at a
specified speed. T he gradeability lim it is th e grade
upon which t he vehicle can just m ov e forward. (SAE
J227a)
Gross brake horsepower – The power of a complete
basic engine, with air cleaner, without fan, and
alternator and air compressor not charging.
Hall effect – Th e development of a transverse electric
potential gradient in a current-carrying conductor or
semiconductor when a magnetic field is applie d.
Hall effect sensor – Generates a digital on or off
signal that indicates speed or position.
High speed digital inputs – Inputs to the ECM from
a sensor that generates varying frequencies (engine
speed and vehicle speed sensors).
Horsepower (hp) – Horsepower is the unit of work
done in a given period of time, equal to 33,000 pounds
multiplied by one foot per minute. 1 hp = 33,000 lb x
1ft/1min.
Hydrocarbons – Unburned or partially burned fuel
molecules.
Idle speed – Low idle is the m inimum engine speed.
High idle is the maximum governed engine speed with
no load.
Idle Vali dation Switch (IVS) – An On/Off switch
that senses when the a ccelerator pedal is in the
idle position. There is also a cold idle advance that
increases low idle speed for a short period to aid in
engine warm-up in cold temperatures.
Injector Drive Module (IDM) power relay – An IDM
controlled re lay that supplie s power to the IDM.
Indicated horsepower – The theoretical power
transmitted to the pistons by gas in the cylinders.
Injection Co n tro l Pre ss u r e (ICP) – High lube
oil pressure generated by a h igh-pressure
pump/pressure regulator used to hydraulically
actuate the fuel injectors and the optional Diamond
Logic® engine brake.
Injection Pressure Regulato r (IPR) – APulseWidth
Modulated (PWM) regulator valve, controlled by the
ECM, that regulates injection control pressure.
Injection Co n tro l Pre ssure (ICP) sensor – A
variable capacitance sensor that senses injection
control pressure.
Intake Air Temperature (IAT) sensor – Athermistor
sensor that senses intake air temperature.
Intake manifold – A plenum through which the air
mixture flows from the charged air cooler piping to the
intake passages of the c ylinder head.
Internatio n al NGV Tool Utilized for Next
Generation Electronics (INTUNE) – The
EGES-270-1
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
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