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ECCS Relay
Supplies power to the ECCS.
ECT
Electronic Controlled
Transmission.
ECU
See Electronic Control Unit.
EFE
See Early Fuel Evaporation.
EFI
See Electronic Fuel Injection.
EFI Main Relay
Supplies power to the engine
control computer.
EGR
See Exhaust Gas Recirculation.
EGR Bimetallic
Vacuum
Switching Valve
(EGR-BVSV)
Allows EGR operation above a
predetermined temperature.
EGR Control
Solenoid Valve
The ECU signals The EGR
Control Solenoid Valve to
enable or disable the
recirculation of exhaust gases.
EGR Control valve
Controls the flow of exhaust
gas back to the intake manifold.
Helps to reduce poisonous NOx
emissions.
EGR Temperature
Sensor (EGR-TS)
The EGR Temperature sensor
uses a Thermistor to measure
the temperature of the exhaust
gas passing through the EGR
valve.
EGR Vacuum
Modulator
(EGR-VM)
Allows EGR operation at heavy
throttle by balancing vacuum
and atmospheric pressure and
regulating exhaust back
pressure.
EGR Vacuum
Switching Valve
(EGR-VSV)
Provides vacuum to appropriate
system or device.
EGR Valve Lift
Sensor or EGR Lift
Sensor
Senses lift of EGR valve stem
(the amount of valve opening).
This signal is used by the ECU
to calculate EGR flow at any
time.
EGR-BVSV
See EGR Bimetallic Vacuum
Switching Valve.
EGR-TS
See EGR Temperature Sensor.
EGR-VM
See EGR Vacuum Modulator.
EGR-VSV
See EGR Vacuum Switching
Valve.
EGTS
See Exhaust Gas Temperature
Sensor.
ELD
See Electric Load Detector.
Electric
(Electrical) Load
Detector (ELD)
This sensor notifies the ECU of
any change in load upon the
electrical system of the vehicle.
The ECU will increase idle
speed to prevent engine stalling
due to heavy demands on the
alternator.
Electromagnetic
Interference (EMI)
Undesired signals interfering
with a needed signal. For
example: static on a radio
brought about by lightning
flashes or closeness to high
voltage power lines.
Electronic
(Electric) Air
Control Valve
(EACV)
Adjusts Idle speed by adjusting
the amount of air bypassing the
throttle plate.
Electronic Air
Bleed Control
Valve (EABCV)
Used on carbureted vehicles.
Operated by the ECU to control
the Air/Fuel mixture.
Electronic
Controlled
Carburetor (ECC)
This carburetor system uses a
computer to get information
from various sensors. The
computer then adjusts the
operation of the carburetor to
reduce emissions.
Electronic
Concentrated
Control System
(ECCS)
A computerized system that
controls the Fuel, Ignition and
Emission systems based on
information supplied by various
sensors.
Electronic Control
Unit (ECU)
A computerized unit that
controls engine operation, and
other systems, based on signals
received from sensors.
Electronic Fuel
Injection (EFI)
Any system where a computer
controls fuel delivery to an
engine by using fuel injectors.
Electronic Spark
Advance (ESA)
The ECU controls spark
advance based on information
from various sensors. No
mechanical or vacuum advance
mechanisms are used.
EMI
See Electromagnetic
Interference.
Engine
Temperature
Sensor
See Coolant Temperature
Sensor.
Summary of Contents for Code Scanner CP9025
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