CHEVROLET CORVETTE 1993 4.G Owners Manual

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1. 140
Automutic Ekctronic
Climate Control (OPTION)
With this system, you can control the
ventilation, heating
and air conditioning
in your vehicle, or you can use the
automatic setting.
Your vehicle also has
the flow-through ventilation system
described later
in this section.
The digital screen displays the outside
temperature, the inside temperature
setting, and the fan speed.
If the inside
temperature is changed,
or if the system
is changed from
OFF to any mode, the
inside temperature setting will be
displayed for several seconds before the
outside temperature is again displayed.
The
air conditioner compressor operates
in all air conditioning positions, and in
(@ (Defrost) when the outside
temperature is above freezing.
When
the air conditioner is on, you may
sometimes notice slight changes in your
vehicle's engine speed and power. This
is normal, because the Automatic
EIectronic Climate Control system
is
designed to cycle the compressor on
and off to keep the desired cooling and
to
help your vehicle's fuel economy.
TEMP SET: This control sets the
interior temperature you want. Press
V to lower the inside temperature
setting; press
A to raise the setting.
The temperature
you set will be
displayed on the digital screen.
Once you set the temperature you want,
the system will try to maintain this temperature,
whether
you are using the
heating
or the cooling controls.
However, if you set the temperature for
60°F (16°C) or 90°F (3Z°C), the fan will
stay on 3p udess you select a
different speed.
Your Automatic Electronic Climate
Control system
has three sensors. The
sun load sensor on top of the dashboard
detects increased interior temperature
caused by sunlight.
To keep you
comfortable, it reduces the interior
temperature
by as much as 5°F (3°C)
below the setting on the digital screen.
The outside air temperature sensor,
located on the right
side of the upper
radiator support
in the grille opening,
reads the outside temperature.
This is
what you usually see on the display.

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The outside ternperatufe sensor reading
is filtered (to minimize false readings)
as follows:
If- the outside temperature decreases,
the -&splayed temperature
will update
immediately.
I€- the outside temperature increases
(such as when stopped in traffic), the
displayed temperature will not update
until one
of the following eonditiom
is met:
Vehicle speed is above 25 mph
Vehicle speed 'is above 45 mph
Updates will occur continuously as long
as the vehicle speed remains above
25 mph (40 Wh).
zf the ignition is turned off for more
than three hours, the current outside air
tempepature when the vehicle is restarted
will be stored in the system immediately.
The third sensor
is the in-vehicle
tempefature sensor, located
in-the
center air outlet on the passenger side.
If you block or cover either interior
sensor, the sensor
will give your system
a false reading.
(40 ,nn/h) for at least 3 minutes, or
(72 krn/h) for 1% minutes.
AUTO (Automatic): This system
autmnatically
adjusts to the
temperature range you select.
rt stays
at. this temperature
with the least
possible noise level
and it will select
the best mode (Heater,
Air
Conditioning or Bi-Level) and fm
speed to keep you comfortable. The
fan blower
will vary its speed
automatically unless you ovenide
it
with theVqrAbutton,
1 .I Set the temperature you want with
2. Press AUTO. An indicator light will
3. Press A (Vent) to allow outside. air
the
TEMP SET switch.
glow above
this.hutton.
to
flaw into the vehicle.
d

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Automutic Electrunic
Climate Cuntvul (C0nt.j
Use These Settings to Set Your Fan
Speed
V (Lqw.Ean): 'This. setting overrides.
the automatic fan speed. To decrease
fan speed, press the
V button and
hold until
you see the fan speed you
want.
AUTO # (Automatic Fan): when
you use this setting, the controller
chooses the fan speed based on the
input signals.
In the AUTO mode
during hot weather (after the vehicle
has not been running for a period of
time) the-fan speed will be
low when
the vehicle is initially
started. This
I42
initial low fan speed is used to purge
the vehicle of hot interior air. In the
AUTO 3f mode during cold weather,
the
fan speed will be delayed. in the
heat
mode until the engine coolant
reaches
an adequate temperature to
provide heat.
A (High .Fan) : This setting overrides
the automatic fan speed. To increase
fan speed, press the A button and
hold until you see the fan speed you
want. There is no €an blower delay.
Fan speeds wil1 range from 1 (lowest
setting)
to 10 (highest setting). When
any fan speed is selected, it will appear
on the digital screen briefly and the
ot~tside temperature will also appear.
Air Conditioning System
If a light above a button flashes when
you turn
on the ignition, it may indicate
an electrical problem with your air
conditioning system. The flashing will
continue for one minute, then go but. It
means you should have your system
checked
and serviced if needed.
It may
also mean the rekigerant level is
too low in your air conditioner system.
The. light will still flash after rebigerant
is added. This means your system will
not cool the air until it is reset.

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To Reset Your System:
1. Turn your ignition.lrey to Off or
Lock.
2. Pull the Courtesy Lights Fuse and
Radio Fuse .out of the- main fuse
panel for
one minute.
3. Put-the fuses back in and start your
vehicle. Your system shuuld be
working.
If you still have a problem,
see your deder,
.For
fuse location, see the Index under
Fuses E. CircuitBreakers and Fuse
.Panel.
Directional Controls
When the €allowing buttons are pressed,
an indicator light.
will glow above .the
button and the fan speed will go to
AUTO 3f unless you select a dBerent
speed. When the system is'changed
€rum
OFF tu any mode, the inside
temperature setting is displayed for
several seconds before the .outside
temperature is again displayed.
& (Maximum A/C): Use for
maximum cooling
or quick cool-down
on very hot days..
This setting will not
operate when outside temperatures are
below
40°F (5°C) I
-2 (Bi-Level): This setting lets air
inte the vehicle only through the
.heater and air conditioner outlets and
brings.the temperature
to the range
you choose. It controls the fan blower
speed by using t-he input signals.
Bi-Level al.so
defogs the side windows,
You can. override the,fan blower speed
by using
the V and A buttons.
a(Vent): In this setting, the
compressor
will not. mn. The-system
will adju-st
to the temperature you
choose, but it cannot cool the vehicle
to a temperature colder than the
outside air temperature, This setting

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Comfort Controls & Audio Systems
Directional Controls (CONT.)
also controls the fan speed
-automaticallyy, unless the fan is
overridden
by the 7 or A button.
'YJJ(Heater): In this setting, all air
coming into the vehicle. is forced to the
floor. The fan blower motor will vary
in speed unless yowpress the Vur A
button. The in-car temperature will
adjust to the setting you choose. The
air conditioning compressor will not.
run in the manual heater mode.
If .your vehicle has an
engine block
heater
and you.use .it during cold
weather,
UoF (-18°C) or lower, your
heating system will .more quickly
provide heat became the engine coolant
is already warmed. See the
Index under
Engine Bluck Heater.
44
(Defrost): With this setting,
mast
of the air is forced. through the
windshield defroster vents. The
cornpressor
runs by using all the input
signals. The fan blower also .goes to a
fixed
high speed with no delay. After
start-up you can override the High fan
blower speed by pushing or AUTO.
DEFOG: Press the and (@'
buttons at the same time to operate the
defog mode. This directs warmed air
through the windshield defroster
vents,
and through the heater ducts.
OFF: Press to turn off the system.
Rear Window Defogger
(COUPE AND HARDTOP CONVERTlBLE)
a (Rear Window Defogger) :Press
this button to warm the defogger grid
on the rear window and
warm the
power mirrors. The indicator light will
glow while the rear window defogger is
operating.
If you have a convertible,
you. will have the 4 (Power Mirror
Defogger) button .on your climate
control system. This button
is for
heated mirrors only. The -rear window
defogger
will turn:off automatically after.
about
10 minutes. of use, You can also-
turn the defogger
off by turning off the
ignition
or by pressing the @ button
again.

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The rear window defogger and power
window defogger .ody aperate when the
Do pot attach a temparary vehicke
license across the defogger grid on the,
rear window.
' engine is ru~g.
Flow-Throuflh Ventilation System
Your corvette's flow-through
ventilation system supplies outside air
into
the vehicle when it is moving.
Outside air will also enter the vehicle
when the heater or the air conditioning
fan is mag.
Ventilation Tips
Kkp the hood and €rant air inlet free
-of ice, snow, or any other obstruction
(such as leaves). The heater and.
defroster dl work far better,
reducing the chance of fogging the
inside of you windows.
When you enter a vehicle in cold
weather, turn the blower fan to the
highest speed f6r.a few moments
before driving off. This helps clear the
intake ducts of 'snow and moisture,
.and reduces the chance of fogging the
inside a€ your windows.
seats clear of objects. This- helps air to
circulate t.hroughout your vehicle. See
the Ind& under Engim? Exhaust.
Keep the air path u,nder the frwt .

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The following .pages describe the audio
systems available for your Corvette, and
how to get the best performance from
them.. Please read about ,the system in
your vehicle.
'I I46
CAUTION I
A
Hearing damage from loud
noise is almost undetectable
until it is too late. Your hearing can
adapt to. higher volumes of sound.
Sound that s-eems normal.can-be
loud and
harmful to your hearing.
Take precautions by adjusting the
volume control
on your radio to-a.
safe sound
level before yaur hearing
adapts to it.
To help avoid hearing loss OK
damage:
1. Adjust the volume control to the
lowest setting.
2. Increase volume slowly until you
hear comfortably and clearly.

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Accessory Wiring Plug (CONTJ
This Wiring Plug has Three Separate
Wires:
The orange wire connects to the
battery.
The pink wire connects to the ignition
(power
is only available in the Run
position).
ground.
The black wire connects to the
When.using $he.accessory wiring
Don't splice wires -directly into
the
accessory plug wire. If done
incmrectly, splicing might cause
damage.to pur electrical system.
The maximum bad dany ' , .
electric,al,equipment..shauld.not
exceed I15 amps, . .
.Be sure to turn off any electricai
equipment when-not-in
use..
Leaving electrical equipment on
€or extended periods ..can drain
your battery.
electrical equipment
you're using
requires frequent connecting and disconnecting. This may
cause
excessive wear on the accessory
plug
and damage your eiectricai
system.
.plug:
Do not use this plug if the
Y3074
ietting the Clock
ietting the cloclc is easy.
, With the radio on or off and the
ignition on, press
SET. The SET
indicator light will glow for five
seconds.
!. You must begin to set the clock to
the correct hour and minute during
those five seconds. Set the clock
by
pressing the TUNE button. TUNE 7
will set the hour. TUNE A sets the
minute.

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IMjFM Stereo wjth Cassette
'layer
qOL/PROG/RCL Turns the unit on
md off when the ignition is on.
Idjusts volume up or down.
BAIJFADE: Turn the inside control
mob to adjust the sound from the left
:o the right speakers.
rum the control ring to adjust the
bund
from the front to the rear
;peakem.
Radio Controls:
The digital display indicates infomation
on time or radio stationfrequency, the
AM or FM radio band, whether the
station is
in stereo, and other radio
functions.
AMEM: Press this button to select
either the
AM or FM radio band. The
band
you select will be displayed on
the digital screen. The frequency of the
station
will be displayed, and if the
station is in stereo, the
ST indicator
will also be displayed.
RCL (Recall): Press to change
between the clock or the radio station
frequency displayed on the digital
screen.
AUTO: Press this button, then press
TUNE to tune to the next station on
the AM or FM band.
An indicator light above
a preset station
button
will glow when the seek mode
stops at that station.