1996 CADILLAC DEVILLE overheating

Downloaded from www.Manualslib.com manuals search engine THIRD (3): This position is also used for noma1
driving however,
it offers more power and lower fuel
economy than
OVERDRIVE (0).
Here are examples for using THIRD (3) instead of
OVERDRIVE (@):
0 When driving on hilly, winding roads.
0 When towing a trailer, so there is less shifting
between
gears.
0 When going down a steep hill.
SECOND (2): This position gives you more power. You
can use SECOND (2) on hills. It can help control your
speed
as you go down steep mountain roads, but then
you would also want
to use your brakes off and on.
I NOTICE:
~ ~~ ~~~ ~ ~~~~
Don’t shift into SECOND (2) unless you are going
slower than
65 rnph (105 kdh), or you can
damage your engine.
FIRST (1): This position gives you even more power
than
SECOND (2). You can use it on very steep hills,
or
in deep snow or mud. (If the shift lever is put in
FIRST (l), the transaxle won’t shift into first gear
until the vehicle is going slowly enough.)
I NOTICE:
~~
If your front wheels can’t rotate, don’t try to
drive. This might happen
if you were stuck in
very deep sand or mud or were up against a solid
object,
You could damage your transaxle.
Also, if you stop when going uphill, don’t hold
your vehicle there with only the accelerator
pedal. This could cause overheating and damage
the transaxle. Use your brakes
to hold your
vehicle in position on a hill.
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-4
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Downloaded from www.Manualslib.com manuals search engine The traction control system warning light may come on for the following reasons:
If there’s a brake system problem that is specifically
related to traction control, the traction control system
will
turn off and the warning light will come on.
engine-related problem, the system will
turn off and
the warning light will come
on.
If the traction control system is affected by .an
If the traction control system warning light comes on
and stays on for an extended period of time when the
system is turned
on, your vehicle needs service.
Engine Temperature Warning Light
This red light tells you that
your engine has overheated.
You should stop the car
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 your engine. In the section “Problems on
the Road,” this
manual explains what to do. See “Engine
Overheating” in the Index.
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*’ -.
2-68

Downloaded from www.Manualslib.com manuals search engine CHECK COOLANT LEVEL - 02: This message will
appear when there is a low level
of engine coolant. Have
the cooling system serviced by a Cadillac technician as
soon
as possible.
CHECK FUEL GAGE - 39: This message will appear
when the fuel supply is less than four gallons (15.2
L)
and the display is turned off.
CHECK OIL LEVEL - 36: For correct operation of
the low oil sensing system, your vehicle should be on a
level surface.
A false CHECK OIL LEVEL message
may appear
if the vehicle is parked on grades. The oil
level sensing system does not check for actual oil level
if the engine has been off for a short period of time, and
the oil level is never sensed while the engine is running.
If the CHECK OIL LEVEL message appears, and your
vehicle has been parked on level ground with the engine
off for at least 30 minutes, the oil level should be
checked
by observing the oil dipstick. Prior to checking
the oil level be sure the engine has been off for five
minutes and your vehicle is on a level surface. Then
check the dipstick and add oil
if necessary. See “Engine
Oil”
in the Index.
CHECK WASHER FLUID - 25: This message will
appear for several seconds indicating that
you need
washer solvent.
CRUISE ENGAGED - 43: This message will appear
for a few seconds
when you select a speed at which
to cruise.
DOOR OPEN - 141: The passenger’s door is open or
ajar when this message appears. The vehicle’s engine
must be running and the transaxle not
in.PARK (P) for
this message to display.
A chime will also sound when
the vehicle’s speed is greater than
5 mph
(8.1 km/h).
DRIVER DOOR OPEN - 140: This message
will display when the vehicle is being shifted out
of
PARK (P) with the engine running to signal that
the driver’s door is open or ajar.
A chime will also
sound when the vehicle’s speed is greater than
5 mph
(8.1 W).
ENGINE COOLANT HOT-IDLE ENGINE - 44:
This message will appear when the engine coolant
temperature
is over 248°F (126°C). To avoid added
strain on a hot engine, turn off the climate control
system. Stop and allow your vehicle to idle until
it cools
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.
2-78

Downloaded from www.Manualslib.com manuals search engine c
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c
STARTING DISABLED DUE TO THEFT SYSTEM
REMOVE IGNITION KEY
- 33: This message will
appear when the Personalized Automotive Security
System (PASS-Key
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 wait for the
DTC to display WAIT 3 MINUTES.
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.
STOP ENGINE ENGINE OVERHEATED - 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.
this message appears while the engine is running, stop
the engine and do not operate it until the cause
of low
oil pressure is corrected. Severe damage to
the engine
can result.
STOP ENGINE LOW OIL PRESSURE - 35: If
THEFT SYSTEM PROBLEMlCAR MAY NOT
RESTART
- 34: This message means there is a problem
in the Personalized Automotive Security System
(PASS-Key 11).
A fault has been detected in the system
which means that
the PASS-Key I1 system is disabled
and is not protecting
the vehicle. The vehicle usually
restarts however, you may want to take your vehicle to a
proper service center before turning off the engine.
TOP SPEED FUEL CUT-OFF - 111: This message
will appear when the PCM senses that the maximum
speed for your Cadillac has been reached. The speed
of
your vehicle will decrease several mph as the fuel
supply is cutoff. This allows your vehicle to stay in a
stable operating range.
TRACTION READY - 91: This message informs the
driver that the traction control system is available. This occurs when the traction on/off button in the glove box
has been returned to
an on position (pressing the button
once turns the traction control system off; pressing the
button again turns the system back on).
TRACTION OFF - 89: This message will be displayed
after
the traction control has been turned off.
TRANS FLUID RESET - 48: With the engine not
running and the ignition on, press and hold the
OFF and
rear defog buttons until the TRANS FLUID RESET
meGage appears on the DIC (between 5 and 20 seconds).
2-81 c

Downloaded from www.Manualslib.com manuals search engine lhrn Signals When Towing a nailer
When you tow a trailer, your vehicle may need a
different
turn signal flasher and extra wiring. Check
with your Cadillac dealer. The green
arrows on your
instrument panel will flash whenever you signal a
turn
or lane change. Properly hooked up, the trailer lamps
will
also flash, telling other drivers you’re about to turn,
change lanes or stop.
When towing a trailer, the green arrows on your
instrument panel will flash for turns even
if the bulbs on
the trailer
are burned out. Thus, you may think drivers
behind you are seeing your signal when they are not. It’s
important to check occasionally to be sure the trailer
bulbs are still working.
Driving On Grades
Reduce speed and shift to a lower gear before you start
down a long or steep downgrade.
I€ 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 b/h) or less to reduce the
possibility
of engine and transaxle overheating.
If your vehicle weighs more
than 1,OOO lbs. (450 kg),
you may want to drive in
THIRD (3) instead of
OVERDRIVE (@).
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Downloaded from www.Manualslib.com manuals search engine Engine Overheating
You will find an ENGINE COOLANT HOT-IDLE
ENGINE message
or a STOP ENGINE ENGINE
OVERHEATED message on the DIC. There is also an
engine temperature warning light
on the instrument
panel. See “Engine Temperature Warning Light” in the
Index.
Overheated Engine Protection Operating
Mode
Y
Should a low coolant condition exist and the message
STOP ENGINE
ENGINE OVERHEATED is displayed,
an overheat protection mode which alternates firing
groups
of four cylinders helps prevent engine damage.
This operating mode
allows your vehicle to be driven
to a safe place in
an emergency; you may drive up to
50 miles (80 km). Towing a trailer in the overheat
protection mode should be avoided.
I 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 may be
severely degraded. Change the
oil and reset the
oil life indicator. See “Engine Oil, When to
~ Change” in the Index.
P

Downloaded from www.Manualslib.com manuals search engine I NOTICE:
Engine damage if you keep running your engine
without coolant isn’t covered
by your warranty.
See “Overheated Engine Protection Operating
Mode” in the Index.
If there seems to
be no leak, with the engine on, 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.
How to Add Coolant to the Coolant Surge
Tank
If you haven? found a problem yet, but the coolant level
isn’t at
the proper level (2.5 inches (60 mm) below the
base
of the fill neck), add a 50/50 mixture of clean
water (preferably distilled) and DEX-COOL TM
antifreeze at the coolant surge tank, but be sure the
cooling system, including
the coolant surge tank
pressure cap, is cool before you do it. (See “Engine Coolant”
in the Index for more information.)
I A CAUTION:
Steam and scalding liquids from a hot cooling
system
can blow out and burn you badly. They are
under pressure, and if you turn the coolant surge
tank pressure cap -- even a little -- they can come
out at
high speed. Never turn the cap when the
cooling system, including the coolant surge tank
pressure cap,
is hot. Wait for the cooling system
and coolantsurge tank pressure cap to cool if you
ever
have to turn the pressure cap.
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Downloaded from www.Manualslib.com manuals search engine Engine Coolant
The cooling system in your vehicle is filled with new
DEX-COOL (orange-colored, silicate-free) engine
coolant. This coolant is designed to remain in your vehicle for
5 years or 100,000 miles (166 0o0 km),
whichever occurs first.
The following explains your cooling system and how
to
add coolant when it is low. If you have a problem with
engine overheating, see “Engine Overheating” in
the Index.
A 50/50 mixture of water and the proper coolant for
your Cadillac will:
Give freezing protection down to -34°F (-37 O C).
Give boiling protection up to 265 “F (129 “C).
Protect against rust and corrosion.
0 Help keep the proper engine temperature.
Let the warning lights and gages work as they should.
NOTICE:
When adding coolant it is important that you use
DEX-COOL TM (orange-colored, silicate-free)
coolant meeting
GM Specification 6277M.
If silicated coolant is added to the system,
premature engine, heater core or radiator
corrosion may result. In addition, the engine
coolant
will require change sooner -- at
30,000 miles (50 000 km) or 24 months,
whichever occurs first.
What
to Use
Use a mixture of one-half clean water (preferably
distilled) and one-half
DEX-COOL (orange-colored,
silicate-free) antifreeze that meets
GM Specification
6277M, which won’t damage aluminum parts. Use
GM Engine Coolant Supplement (sealer) (GM Part
No. 3634621) with any complete coolant change. If you
use this mixture, you don’t need
to add anything else.
A special procedure is required for adding sealer; see the
Cadillac service manual.
(To order a service manual, see
“Service and Owner Publications”
in the Index.)
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