Glossary
A B C D
E F G H
I J K L M N O
P Q R S T U V W
X Y Z
A
Air/Fuel Ratio
The ratio of air to gasoline by weight in the fuel mixture drawn
into the engine
Atmospheric Pressure
The pressure on the Earth's surface caused by the of the air in the
atmosphere. At sea level, this pressure is 14.7 psi at 32 degrees Fahrenheit.
B
C CYL
Sensor
The Cylinder Sensor is used to detect the position of N0. 1
cylinder. The signal is used to trigger the sequential fuel
injection.
D
E
ECU
Electronic Control Unit. The functions of the ECU include;
- Starting control.
- Injector control.
- Electronic air control
- Ignition timing control
- Fuel pump control
- Fuel cut-off control
- Fail safe.
- Back up system.
Self diagnostics.
F
G
H
I
IMA Sensor
Idle Mixture Sensor maintains the correct air/fuel ratio at
idle.
J
K
L
M MAP
Sensor
This sensor converts Manifold Air Pressure readings into electrical
voltage signals and sends them to the ECU
N
O Oxegen
Sensor (O2 Sensor)
The Oxygen Sensor detects the oxygen content in the exhaust gas
and sends a signal to the ECU. The ECU uses this signal to control
the fuel injector duration, maintaining the stoichiometric air/fuel
ratio of 14.7:1
P
PA sensor
Atmospheric Pressure Sensor converts atmospheric pressure into
voltage signals. The ECU modifies basic injector duration to compensate
for changes in atmospheric pressure.
Q
R
S
T
TAS Sensor (or TPS Sensor)
Throttle Angle Sensor translates the postion of the throttle plate
to an electricla signal. The signal is near 0 at idle and increases
to just under 5 volts at WOT (Wide Open Throttle).
TA Sensor
Intake Air Temperature Sensor works like the TW sensor but has a
reduced thermal capacity for quicker responce.
TW Sensor
Coolant Temperature Sensor is used to measure the differences in
the coolant temperature.
U
V
VSS
Vehicle Speed Sensor is used by the ECU as well as the cruise
control and automatic transaxle control units.
W
WOT
Wide Open Throttle. When the gas pedal is fully depressed and
the throttle body plate is in the wide open position.
X
Y
Z
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