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Actron Code Scanner CP9025 User Manual page 82

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Supplies power to the ECCS.
Electronic Controlled
Transmission.
See Electronic Control Unit.
See Early Fuel Evaporation.
See Electronic Fuel Injection.
Supplies power to the engine
control computer.
See Exhaust Gas Recirculation.
Allows EGR operation above a
predetermined temperature.
The ECU signals The EGR
Control Solenoid Valve to
enable or disable the
recirculation of exhaust gases.
Controls the flow of exhaust
gas back to the intake manifold.
Helps to reduce poisonous NOx
emissions.
The EGR Temperature sensor
uses a Thermistor to measure
the temperature of the exhaust
gas passing through the EGR
valve.
Allows EGR operation at heavy
throttle by balancing vacuum
and atmospheric pressure and
regulating exhaust back
pressure.
82
Provides vacuum to appropriate
system or device.
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.
See EGR Bimetallic Vacuum
Switching Valve.
See EGR Temperature Sensor.
See EGR Vacuum Modulator.
See EGR Vacuum Switching
Valve.
See Exhaust Gas Temperature
Sensor.
See Electric Load Detector.
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.
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.
Adjusts Idle speed by adjusting
the amount of air bypassing the
throttle plate.
Used on carbureted vehicles.
Operated by the ECU to control
the Air/Fuel mixture.
This carburetor system uses a
computer to get information
from various sensors. The
computer then adjusts the
operation of the carburetor to
reduce emissions.
A computerized system that
controls the Fuel, Ignition and
Emission systems based on
information supplied by various
sensors.
A computerized unit that
controls engine operation, and
other systems, based on signals
received from sensors.
Any system where a computer
controls fuel delivery to an
engine by using fuel injectors.
The ECU controls spark
advance based on information
from various sensors. No
mechanical or vacuum advance
mechanisms are used.
See Electromagnetic
Interference.
See Coolant Temperature
Sensor.

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