1994 CADILLAC DEVILLE engine overheat

Downloaded from www.Manualslib.com manuals search engine FUEL LEVEL VERY LOW - 11
This message serves as a warning that the fuel level in your tank is
critically low.
It means you should stop for fuel immediately.
7 SERVICE NC SYSTEM A/C COMPRESSOR OFF - 14
This message appears when the electronic sensors that control the A/C
and heating system are no longer working. You may notice a drop in
Climate Control system serviced if this message appears.
- heating and A/C efficiency when this message appears. Have your
STARTING DISABLED DUE TO THEFT SYSTEM REMOVE
IGNITION KEY - 33
This message will a ear when the Personalized Automotive Security
System (PASS-Key
gp 11) senses that an improper ignition key is being used
to
try to start the vehicle. Check the ignition key for damage. If it is
damaged,
it may need to be replaced. If you see no damage, clean the
pellet contacts with a soft cloth or napkin. Remove the ignition key and
The Instrument Panel Cluster will then run a timer and change the
messages to “WAIT
2 MINUTES ”, “WAIT 1 MINUTE”, and then
“START CAR”. When the
“START CAR’ message is displayed, try again
to start the engine.
- wait for the Driver Information Center to display “WAIT 3 MINUTES ”.
SERVICE NOW - REFER TO OWNERS MANUAL - 02
This message appears if you have a problem with the Powertrain Control
Module (PCM).
To correct this problem have your vehicle serviced at
your Cadillac dealership.
-
SERVICE RIDE CONTROL - 84
This message is displayed to indicate that the Suspension System is not
your Cadillac dealership at your earliest convenience.
I_ operating properly. To correct this problem have your vehicle serviced at
STOP ENGINE ENGINE OVERHEATED - 42
--- This message will appear when your engine has overheated. Stop and
turn your engine
off immediately to avoid severe engine damage. See
“Engine Overheating” in the Index.

Downloaded from www.Manualslib.com manuals search engine Driving On Grades
Reduce speed and shift to a lower gear before you start down a long or
steep downgrade. If you don’t shift down, you might have to use your
brakes
so much that they would get hot and no longer work well.
On a long uphill grade, shift down and reduce your speed to around 45
mph (70 km/h) or less to reduce the possibility of engine and transaxle
overheating.
If your trailer weighs more than 1,000 pounds (450 Kg) and you have an
automatic transaxle with Overdrive, you may want to drive in “3” instead
of Overdrive.
Parking on Hills
You really should not park your vehicle, with a trailer attached, on a hill.
If something goes wrong, your rig could start to move. People can be
injured, and both your vehicle and the trailer can be damaged.
But
if you ever have to park your rig on a hill, here’s how to do it:
Apply your regular brakes, but do not shift into “P” (Park).
0 Have someone place chocks under the trailer wheels.
When the wheel chocks are in place, release the regular brakes until
Reapply the regular brakes. Then shift into “P” (Park) firmly and
the
chocks absorb the load.
apply your parking brakes.
Release the regular brakes.
When You Are Ready to Leave Afier Parking on a Hill
1. Apply your regular brakes and hold the pedal down while you:
Start your engine;
Shift into a gear; and
Be sure the parking brake has released.
2. Let up on the brake pedal.
212
r
r
.-
r- -

Downloaded from www.Manualslib.com manuals search engine 3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the chocks.
Engine Cooling When Trailering
Your cooling system may temporarily overheat during severe operating
conditions such as;
Climbing grades steeper than 4% at ambient temperatures above
90” Fahrenheit (32’Celsius) with a loaded vehicle and trailer.
Stopping after high-speed driving.
Idling for long periods in stop and go traffic.
If “ENGINE
HOT A/C COMPRESSOR OFF” message appears on the
Driver Information Center, do not be alarmed. This is a normal function
designed to reduce the load on the engine and cooling system you can
continue to drive your vehicle.
If “ENGINE COOLANT
HOT” message appears on the Driver
Information Center, pull off to the side of
the road as soon as it is safe to
do so. When the vehicle is at a complete stop, shift the transmission
selector to
P (Park) and allow the engine to idle. Do not turn off the
engine or increase engine speed above a normal idle. Within
two or three
minutes the system should cool sufficiently to allow
A/C operation to
resume. At that
time resume driving at a reduced speed. Return to
normal driving after
10 minutes if the “ENGINE COOLANT HOT”
message
is not displayed.
Maintenance when Trailer Towing
Your vehicle will need service more often when you’re pulling a trailer.
See
the Maintenance Schedule for more on this. Things that are
especially important
in trailer operation are automatic transaxle fluid
(don’t overfill), engine oil, belts, cooling system, and brake wear. Each of
these is covered
in this manual, and the Index will help you find them
quickly. If you’re trailering, it’s a good idea to review these sections
before
you start your trip.
Check periodically
to see that all hitch nuts and bolts are tight.
213

Downloaded from www.Manualslib.com manuals search engine Don't have your vehicle towed on the front wheels, unless you must. If
the vehicle must be towed on the front wheels, don't go more than 55
mph (88 km/h) or farther than 500 miles (804 km) or your transaxle will
be damaged. If these limits must be exceeded, then the front wheels have
to be supported on a dolly.
NOTICE:
Do not attach winch cables or "J" hooks to suspension
components when using car carrier equipment. Always use
T-hooks inserted in the T-hook slots.
ENGINE OKE..EATING
The Driver Information Center will display either" ENGINE COOLANT
HOT IDLE ENGINE' or
"STOP ENGINE ENGINE
OVERHEATING". If
you have a Canadian or Export vehicle you will
also find a warning light about a hot engine on the instrument cluster.
225

Downloaded from www.Manualslib.com manuals search engine #‘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.
Idle for long periods in traffic.
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. Turn on your heater to full hot at the highest fan speed and open the
3. Dial temperature control to the highest heat setting and open the
window as necessary.
window, as necessary.
4. Try to keep your engine under load (in a drive gear where the engine
If you no longer have the overheat warning, you can drive. Just to be safe,
drive slower for about ten minutes. If the warning doesn’t come back on,
you can drive normally.
runs
slower).
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.
You may decide not to lift the hood, but get service help right away.
227

Downloaded from www.Manualslib.com manuals search engine The coolant level should be at or above the FULL COLD marking on the
coolant recovery tank.
If it isn’t, you may have a coolant leak somewhere
in the cooling system.
NOTICE:
Engine damage from running your engine without coolant isn’t
covered by your warranty.
If there seems to be no leak, check to see if the electric engine fans are
running.
If the engine is overheating, both fans should be running. If they
aren’t, your vehicle needs service.
229

Downloaded from www.Manualslib.com manuals search engine When the correct fluid level is obtained, push the dipstick back in all -
the way.
ENGINE COOLANT 7
The following explains your cooling system and how to add coolant when (. I
it is low. If you have a problem with engine overheating, see “Engine
Overheating” in the Index.
The proper coolant for your Cadillac will:
0 Give freezing protection down to -34°F (-37OC) .
0 Give boiling protection up to 262 F (128 C) .
0 Prote-ct against rust and corrosion.
Help keep the proper engine temperature.
Let the warning-lights work as they shoula.
What to Use
Use a mixture of one-half clean water (preferably distilled) and one-half
antifreeze that meets
“GM specification 1825-M,” which won’t damage
aluminum parts. You can also use
a recycled coolant conforming to GM
Specification
1825-M with a complete coolant flush and refill. Use GM
Engine Coolant Supplement (sealer) with any complete coolant change.
If you use this mixture, you don’t need to add anything else.
r
c
270

Downloaded from www.Manualslib.com manuals search engine .A CAUTION:
. Adding only plain water to your cooling system can be
’ . dangerous. Plain water, or some-other liquid like alcohol, can
boil before the proper coolant .mix ,will. Your vehicle’s coolant
warning
system is set-for the proper coolant mix. With plain
water or the
wrong mix, your engine could get too hot but you
.wouldn’t get the overheat warning. Your engine could catch fire
and you
OF others could be burned. Use a 50/50 mix of clean
water and
a proper antifreeze.
NOTICE:
If you use an improper coolant mix, your engine could overheat
and be badly damaged. Therepair cost wouldn’t be covered
by
your warranty. Too much water in the mix can freeze and crack
the engine, radiator, heater .coreand other parts.
Adding Coolant
The Coolant Recovery Tank is located on the right side of your vehicle.
To Check Coolant
When your -engine is cold, the coolant level should be at the FULL
COLD mark or a little higher. When your engine is warm, the level
should be up to
FULL HOT mark or a little higher.
To Add Coolant
If you need more coolant, add the proper mix at the coolant recoverv
tank.
271