Mitsubishi Eclipse Workshop Manual page 118

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13-54
FUEL
-
On-vehicle Inspection
of
MPI Components
INTAKE AIR TEMPERATURE SENSOR
Air
flow
sensor
(built
in
intake
air temperalure
o
()
c
|o
U'
'6
o
G
Temperature
o
CD
(D
o
J
CL
)
o
Temperature
Air
flor
sensor
connector
@ Equipment
side
conn€ctor
"\
e
I
C
o
ffiffiffi
C
o
OPERATION
o
The intake air temperature sensor converts the engine intake alr temperature into
a
voltage and inputs it
to the
engine control unit, which then corrects the
fuel injection
rate, etc. based on the input signal.
.
The 5V power in the engine
control unit
is
supplied via a resistor in the unit to the intake air temperature
sensor. Via the sensor
which
is a kind of resistor.
it
is
grounded
in the engine control
unit. The intake air
temperature sensor resistor has such characteristic
that its
resistance decreases as
the
intake air
temperature
rises.
o
The intake air temperature sensor terminal voltage increases
or
decreases as
the
sensor
resistance
increases or
decreases. Therefore,
the intake air temperature sensor terminal voltage
changes
with the
intake air temperature, decreasing as the temperature
rises.
TROUBI."ESHOONNG HINTS
The intake air temperature sensor senses the intake air temperature in the air cleaner so that it may indicate
a
temperature different from outside temperature depending on
engine operating
state.
T
T
f-f3
5V
@
ttlitgubishi
Motorc
Corporation
Apr.
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PWt E90r0