2000 CADILLAC CATERA coolant temperature

2-20 To Use the Engine Coolant Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical cord.
The electrical cord for the engine coolant heater is in
front of the air cleaner filter and under the headlamp
cover, on the passenger's side of the engine.
3. Plug it into a normal, grounded 110
-volt AC outlet.
CAUTION:
Plugging the cord into an ungrounded outlet
could cause an electrical shock. Also, the wrong
kind of extension cord could overheat and cause
a fire. You could be seriously injured. Plug the
cord into a properly grounded three
-prong
11 0
-volt AC outlet. If the cord won't reach,
use a heavy
-duty three-prong extension cord
rated for at least 15 amps.
4. Before starting the engine, be sure to unplug
and store the cord as it was before to keep it away
from moving engine parts. If you don't, it could
be damaged.
How long should you keep the coolant heater plugged
in? The answer depends on the outside temperature, the
kind of oil you have, and some other things. Instead
of trying to list everything here, we ask that you contact
your dealer in the area where you'll be parking your
vehicle. The dealer can give you the best advice for that
particular area.

2-71 Engine Coolant Temperature Warning Light
This light tells you that
the engine has overheated.
If this light comes on, you
should stop the vehicle and
turn the engine off as soon
as possible.
A warning chime should also sound if this light comes on.
As a check, the light should come on for a few seconds
when you start the engine. See ªEngine Overheatingº in
the Index.
Engine Coolant Temperature Gage
This gage shows the engine
coolant temperature. If the
gage pointer moves into
the red area, the engine is
too hot!This reading means the same thing as the warning
light
-- the engine coolant has overheated. You should
stop the car and turn the engine off as soon as possible.
See ªEngine Overheatingº in the Index.
Low Coolant Warning Light
This warning light should
come on for a few seconds
while you are starting the
engine. If the light doesn't
come on, have it repaired.
Your vehicle is equipped with a low coolant level sensor
(switch and float) that is designed to detect when your
vehicle's coolant level drops below the set limit. If the
low coolant level sensor (under the coolant surge tank)
detects that the level drops while the engine is running,
the low coolant indicator will light and remain lit until
the ignition switch is turned off. Check the coolant level
and add coolant as needed. The light should turn off as
soon as the coolant level is at its proper operating range.

3-4
In cold weather, when the system senses the need for
heat, airflow will be directed out of 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
the climate control system set for automatic operation,
the air will first flow out of the floor air outlets during
cool down. That is normal. This is to remove hot air
from the air outlets. As the air is cooled, the airflow
will move through the air conditioning outlets.
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.If you leave your vehicle, the system will remember
the control setting the next time you start your engine,
except for recirculation and rear defrost (heated backlite).
Each ignition cycle cancels recirculation.
Manual Operation
You may manually adjust the air delivery mode or
fan speed.
HEATER/DEFROST: This setting directs air to
the floor outlets and toward the windshield.
AC: This setting directs airflow through the middle
instrument panel outlets.
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 middle instrument
panel outlets while warm air is directed to the floor.
HEATER: This setting directs warm air
through the floor outlets. Some warm air is sent to
the windshield to minimize fogging.

3-5
DEFROST: Press this button to quickly remove
fog or frost from the windshield (the blower works in
high
-speed). This setting sends most of the airflow to the
windshield with only a small amount to the floor outlets.
FAN SPEEDS: Press the driver's side
TEMP/AUTO knob to set the fan speed for AUTO.
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
reach the highest position of the display. If you want the
blower fan at a low speed, press the down arrow button
until the lowest position is displayed.
ON/OFF: Press this button to turn the system off.
Press this button again to turn the system back on.
Turning the climate control system on in this way
will recall all previous manually set mode settings. If the system is turned on by pushing the driver's
TEMP/AUTO knob for automatic operation, all of the
previous manually set mode settings will be changed
back to the fully automatic mode.
AC: Press this button to turn the air conditioning on
and off. The system will cool and dehumidify the air
inside the vehicle. In the automatic operation mode,
the display will show AC OFF when the air conditioning
has been turned off.
RECIRCULATION: Press this button to limit the
amount of fresh air entering your vehicle. This is helpful
to limit odors entering your vehicle. In the automatic
operation 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.

6-20 How to Check Lubricant
If the level is below the bottom of the filler plug hole,
you'll need to add some lubricant. Add enough lubricant
to raise the level to the bottom of the filler plug hole.
What to Use
Refer to the Maintenance Schedule to determine what
kind of lubricant to use. See ªRecommended Fluids
and Lubricantsº in the Maintenance Schedule booklet.
Engine Coolant
The cooling system in your vehicle is filled with
DEX
-COOL engine coolant. This coolant is
designed to remain in your vehicle for 5 years or
150,000 miles (240 000 km), whichever occurs first,
if you add only DEX
-COOL extended life coolant.
The following explains your cooling system and how
to add coolant when it is low. If you have a problem
with engine overheating, see ªEngine Overheatingº
in the Index.
A 50/50 mixture of clean, drinkable water and
DEX
-COOL coolant will:

Give freezing protection down to
-34F (-37C).

Give boiling protection up to 265F (129C).

Protect against rust and corrosion.

Help keep the proper engine temperature.

Let the warning lights and gages work as
they should.