1998 CADILLAC DEVILLE engine coolant

Downloaded from www.Manualslib.com manuals search engine down or the message is removed. If it does not cool
down, turn
off the engine and have it serviced before
driving it again. Severe engine damage can result from
an overheated engine. See “Engine Overheating”
in
the Index.
ENGINE HOT - NC OFF - 16: This message displays
when the engine coolant becomes hotter than the normal
operating temperature.
To avoid added strain on a hot
engine, the
air conditioning compressor is automatically
turned
off so that air conditioned air is not delivered. If
the coolant temperature returns to normal, you must
select AC to return
to a normal A/C compressor
operation. If this message continues to appear, have
the system repaired as soon as possible to avoid
compressor damage.
ENGINE MISFIRE, EASE OFF GAS PEDAL - 114:
An engine misfire has occurred. You’ll need to ease off
the gas pedal.
ENGINE OVERHEATED, STOP ENGINE - 42: This
message
will appear when the engine has overheated.
Stop and turn the engine
off immediately to avoid severe
engine damage. See “Engine Overheating” in the Index.
A multiple chime will also sound when this message
is displayed.
ENGINE POWER REDUCED - 41: This message
informs the driver that their vehicle is reducing engine
power because the transaxle is being placed in gear
under conditions that may cause damage to the vehicle
powertrain or vehicle acceleration.
FUEL LEVEL LOW - 11: This message serves as a
warning that the fuel level in the tank
is critically low.
Stop for fuel soon.
HEADLAMPS SUGGESTED - 23: If it’s dark enough
outside and the twilight sentinel control is
off, a
HEADLAMPS SUGGESTED message will display on
the Driver Information Center (DIC). This message
informs the driver that turning on the exterior lamps is
recommended even though the Daytime Running
Lamps (Dm) are still illuminated. It’s become dark
enough outside to require the headlamps andQr
exterior lamps.
ICE POSSIBLE - 13: This message appears when
the outside air temperature is cold enough to create icy
road conditions.

Downloaded from www.Manualslib.com manuals search engine To find your comfort zone, start with the 75 "F (24°C)
setting and allow about 30 minutes for the system to
regulate. Press the red or blue temperature buttons
to adjust the temperature if necessary. If you choose
60°F (16"C), the system will remain at that maximum
cooling setting and
will not regulate fan speed. If you
choose the temperature of
90°F (32" C), the system will
remain at that maximum heating setting and will not regulate fan speed. Choosing either maximum setting
will not cause the system to heat or cool any faster.
With the automatic setting, the air conditioning
compressor automatically cycles when needed to cool
the air. In cold weather, when the system senses the need for heat, the airflow will be directed out the floor
outlets.
As the interior temperature approaches a desired
setting, the blower speed will decrease.
To maintain
interior comfort, the airflow may move to the instrument
panel air outlets and floor outlets (bi-level mode). On
bright sunny days in cold weather, the airflow may come
out of the air conditioning outlets
(AC mode) to
maintain comfort and prevent stuffiness. If your vehicle is sitting
out on a hot day and you have
it set on
AUTO, the air will first flow out the floor air
outlets for a few seconds. That is normal.
This is to
expel hot air from the air outlets.
As the air is cooled,
the airflow will move through the air conditioning
outlets. If you start your vehicle with the
fan setting on
HI, it will
skip the air conditioning purge.
To avoid blowing cold
air in cold weather, the system will
delay turning on the fan until warm air is available. The
length of delay depends on the outside air temperature,
engine coolant temperature or the time since the engine
was last started.
As the coolant warrns up, the blower fan
speed
will gradually increase and air will flow from the
heater outlets, with some airflow to the windshield to
prevent fogging under most normal conditions.
If you leave your vehicle, the system will remember the
control setting the next time you start your engine,
except for recirculation and defrost. Each ignition cycle
cancels recirculation, whereas, DEFROST will change
to automatic operation when the ignition is shut off and
then turned back on.

Downloaded from www.Manualslib.com manuals search engine Manual Operation
0 RECIRCULATION: Press this button to limit the
amount of fresh
air entering your vehicle. This is helpful
when you
are trying to cool the air quickly or limit
odors entering your vehicle. In the AUTO mode, the
system will use recirculation as necessary to cool the
air. Pressing the recirculation button will change the
operation to a manual mode and the
air will recirculate
non-stop. Press this button again to turn off the
recirculation feature.
If you notice the windows fogging, press the
recirculation button to exit the recirculation mode.
OFF: Press this button to turn the system off. Fresh
air will continue to flow through the vehicle, and
the system will try to maintain the previously set
temperature. The outside temperature will show in
the display when the system
is off.
DEFOG: Press this button to divide the air between the
windshield and the heater outlets. This is useful when
fog appears on the windshield or side glass due to
sudden rain or snowy conditions.
AUTOECON: Press this button to switch between
AUTO and
ECON. The ECON setting attempts to keep
air at a selected temperature, however, it does not remove
humidity from the
air. Use this setting in cold or cool weather to save fuel. The AUTO setting is used when
it’s warm outside and you need
to cool the air in order to
maintain
a selected temperature and blower speed.
FAN SPEEDS: Press the button with the fan symbol
on it until AUTO is displayed on the screen. At this
setting, the fan speed is automatically controlled. If
it is
cold outside, the blower may not run in the maximum
high fan speed right away. The system checks the
temperature of the engine coolant to assure it is warm
enough to provide heat. When the engine coolant is
warm, the controller allows the fan to gradually increase
.
to a higher speed. This prevents cold air from blowing
into the passenger compartment.
If you want the blower
fan at a high speed, press the up arrow button until you
see HI on the display. If you want the fan speed to be
automatic, but you like the
fan speed to be higher than
the AUTO setting, press the fan symbol button until
HI
AUTO is shown on the display. If you want the blower
fan at a low speed, press the down arrow button until LO
is shown on the display. If you want the fan speed to run
lower than the AUTO setting, press the button until
AUTO
LO is shown on the display.
DEFROST Press this button to quickly remove
fog or frost from the windshield. This setting sends
most of the airflow to the windshield with only a
small amount to the floor outlets.
3-5

Downloaded from www.Manualslib.com manuals search engine Mode Button
Press this button to deliver air through the floor, middle
or windshield outlets. The system will stay in the
selected mode until the
MODE button is pushed again.
Press the up or down arrow to cycle through the
available modes.
Automatic Operation
When the system is set for automatic operation, sensors
will control the air delivery mode. Air will come from
the floor, middle or windshield outlets. The fan speed
will vary as the system maintains the selected
temperature setting.
Be careful not to put anything over the solar sensor
located in the middle of the instrument panel near the
windshield. This sensor is used by the automatic system
to regulate temperature.
To find your comfort zone, start with the 75°F (24°C)
setting and allow about
30 minutes for the system to
regulate. Turn the TEMP/AUTO knob to adjust the
temperature
if necessary. If you choose 60 "F (1 6 " C),
the system will remain at that maximum cooling
setting and will not regulate fan speed. If you choose the
temperature
of 90°F (32"C), the system will remain at
that maximum heating setting and will not regulate fan speed. Choosing either maximum setting will not cause
the system to heat or cool any faster. With the automatic setting, the air conditioning
compressor automatically cycles when needed to cool
the air. In cold weather, when the system senses the
need for heat, the airflow will be directed out the floor
outlets.
As the interior temperature approaches a desired
setting, the blower speed will decrease.
To maintain
interior comfort, the airflow may move to the instrument
panel
air outlets and floor outlets (bi-level mode). On
bright sunny days in cold weather, the airflow may come
out of the air conditioning outlets (AC mode) to
maintain comfort and prevent stuffiness.
If your vehicle is sitting out on a hot day and you have
it set on AUTO,
the air will first flow out the floor air
outlets for a few seconds. That is normal. This is to
expel hot air from the air outlets.
As the air is cooled,
the airflow will move through the air conditioning
outlets.
If you start your vehicle with the fan setting
on HI, it will skip the air conditioning purge.
To avoid blowing cold air in cold weather, the
system will delay turning on the fan until warm air is
available. The length of delay depends on the outside
air temperature, engine coolant temperature or the time
since the engine was last started. As the coolant warms
up, the blower fan speed will gradually increase and air will flow from the heater outlets, with some
airflow to the windshield to prevent fogging under
most normal conditions.
3-7

Downloaded from www.Manualslib.com manuals search engine If you leave your vehicle, the system will remember
the control setting the next time you start your engine,
except for recirculation and defrost. Each ignition cycle
cancels recirculation, whereas, DEFROST will change
to automatic operation when the ignition is shut
off and
then turned back on.
Manual Operation
You may manually adjust the air delivery mode or
fan speed.
H AC: This setting directs airflow through the middle
instrument panel outlets.
A.
A@
BI-LEVEL: This setting directs air into your
vehicle in two ways. Cool air
is directed to the upper
portion of your body through the four instrument panel
outlets while warmed air
is directed to the floor.
7. HEATEIUDEFROSE This setting directs air to
the floor outlets and toward the windshield.
l# HEATER: This setting directs warmed air
through the floor outlets. Some warm air is diverted to
the windshield to minimize fogging.
.
DEFROST: Press this button to quickly remove
fog or frost from the windshield. This setting sends most
of the airflow to the windshield with only a small
amount to the floor outlets.
FAN SPEEDS: Press the button with the fan
symbol on it until AUTO is displayed on the screen.
At this setting, the fan speed
is automatically controlled.
If it is cold outside, the blower may not run in the
maximum high
fan speed right away. The system
checks the temperature of the engine coolant to assure
it is warm enough to provide heat. When the engine
coolant is warm, the controller allows the fan to
gradually increase to a higher speed. This prevents
cold air from blowing into the passenger compartment.
If you want the blower fan at
a high speed, press the
up arrow button until you see
HI on the display. If you
want the fan speed to be automatic, but you like the fan
speed to be higher than the AUTO setting, press the fan
symbol button until HI AUTO
is shown on the display.
If you want the blower fan at a low speed, press the
down arrow button until
LO is shown on the display.
If you want the
fan speed to.run lower than the AUTO
setting, press the button until
LO AUTO is shown on
the display.
3-8

Downloaded from www.Manualslib.com manuals search engine Engine Overheating
You will find an ENGINE COOLANT HOT, IDLE
ENGINE message or an ENGINE
OVERHEATED
STOP, ENGINE message on the Driver Information
Center (DIC). You will
also hear a chime. There is also
an engine temperature warning light andor gage on the
instrument panel. See “Engine Coolant Temperature
Warning Light” or “Engine Coolant Temperature Gage”
in the Index.
Overheated Engine Protection
Operating Mode
NOTICE:
After driving in the overheated engine protection
operating mode, to avoid engine damage, allow
the engine to cool before attempting any repair.
The engine oil will be severely degraded. Repair
the cause of coolant loss, change the oil and reset
the oil life indicator. See “Engine Oil, When to
Change” in the Index.
Should an overheated engine condition exist and the
message ENGINE OVERHEATED STOP ENGINE is
displayed, an overheat protection mode which alternates
firing groups
of four cylinders helps prevent engine
damage.
In this mode, you will notice a loss in power
and engine performance. This operating mode allows
your vehicle to be driven to a safe place in
an
emergency; you may drive up to 50 miles (80 lun).
Towing a trailer in the overheat protection mode should
be avoided.
5-15

Downloaded from www.Manualslib.com manuals search engine If Steam Is Coming From Your Engine I
CAUTION:
Steam from an overheated engine can burn you
badly, even if you just open the hood. Stay away
from the engine if you see or hear steam coming
from it. Just turn
it off and get everyone away
from the vehicle until
it cools down. Wait until
there
is no sign of steam or coolant before you
open the hood.
If you keep driving when your engine is
overheated, the liquids in it can catch fire. You or
others could be badly burned. Stop your engine if
it overheats, and get out of the vehicle until the
engine is
cool.
5-16

Downloaded from www.Manualslib.com manuals search engine I NOTICE:
If your engine catches fire because you keep driving with no coolant, your vehicle can be
badly damaged. The costly repairs would not be
covered by your warranty. See “Overheated
Engine Protection Operating Mode” in the Index.
____~
If No Steam Is Coming From Your Engine
If you get the overheat warning but see or hear no
steam, the problem may not be too serious. Sometimes
the engine can get a little too hot when you:
Climb a long hill on a hot day.
Stop after high-speed driving.
0 Idle for long periods in traffic.
0 Tow a trailer.
If you get the overheat warning with no sign of steam,
try this for a minute or
so:
1. Turn off your air conditioner.
2. Dial temperature control to the highest heat setting
and open the windows, as necessary.
3. If you’re in a traffic jam, shift to NEUTRAL (N);
otherwise, shift to the highest gear while
driving
-- OVERDRIVE (GO) or THIRD (3).
If you no longer have the overheat warning, you
can drive. Just to be safe, drive slower for about
10 minutes. If the warning doesn’t come back on, you
can drive normally.
If the warning continues, pull over, stop, and park your
vehicle right away.
If there’s still no sign of steam, you can idle the engine
for two or three minutes while you’re parked, to see
if the warning stops. But then, if you still have the
warning,
turn off the engine and get everyone out of
the vehicle until it cools down. Also, see “Overheated
Engine Protection Operating Mode” listed previously in
this section.
You may decide not to lift the hood but
to get service
help right away.
5-17