Mitsubishi Eclipse Workshop Manual page 706

55-6
HEATER,
AIR
coNDtrloNER
AND
VENTTLATTON -
Troubreshootins
AIR
CONDITIONER CONTROL
UNIT
CIRCUIT
Air
condrtioner
ccnlrol
unit
Description
of
Operation
(1)
A negative-characteristic thermistor is employed
O
for the air-thermo sensor and the air-inlet öensor
in order to
convert the ambient temperature at
the
sensor part
to
resistance.
The sensor power-supply voltage (bV) of
the
air
conditioner control unit is applied
to
each sen-
sor.
(2)
I[e_compressor operation
mode changes (from
OFF
to
ECONO
to
A/C...) each
timä the
air
conditioner switch
is
pressed. When
the
air
conditioner switch
is
pressed
in to the first step,
the mode is
changed
to the
ECONO mode {the
indicator illuminat-es.in orange, and the voltage
at
terminal
4
of
the air
conditioner
switöh
ffi:f;:"3:d
in
to the
second step, the
,.,..oo"
O
is
changed
to
the air
conditioner mode
(the
indicator illuminates in green), and the voltage at
ierminal
2 of the
air conditioner switch becoines
Bv.
Bv:
Battery voltage
I
I
i,
lgnition
switch
Blower
switch
Engine
coolant
temperature
switch
*Wire
harness
side
03aolc6
lFil *
d-l.fu
IEEL9
süAl
lt5t6T:liFiDEll
\uL't !t ru
Dual
pressure
switch
@
Air inlet
Air
outlet
sensor
sensor
--..-r
rh
r*J
?l
Magnetic
clutch
MPI control
unit
(3) The output (terminal
4) of
the air
conditioner
control unit is output when all of the following
conditions are
satisfied.
O
me
air conditioner
switch
is ON (ECONO or
A/C
mode).
@ fne
air-thermo sensor ambient temperature
(evaporator
outlet air
temperaturei is
4"c
(39'F)
or
higher.
@
ne
air-inlei sensor ambient
temperature
(evaporator intake
air
temperaturei is
a"c
(39"F) or
higher.
@
Mitsubishi Moto6
Corporation
Apr.
1991
PWUE9010