1998 CADILLAC SEVILLE check engine

Downloaded from www.Manualslib.com manuals search engine For the vertical adjustment, state inspection stations generally
will allow a reading of plus 0.76 degrees or
minus
0.76 degrees from the center of the bubble.
It is recommended that the upper limit not exceed plus
0.4 degrees from the center of the bubble. Other drivers
may flash their high beams at you
if your adjustment is
much above plus
0.4 degrees.
If you find that the headlamp aiming needs adjustment,
follow these steps:
Adjustment screws can be turned with an
E8 Torx@
socket or
T15 Torx screwdriver.
Ill 1. Locate the vertical
aiming screw
(B) that is
directly behind the
headlamp assembly.
2. Turn the vertical aiming screw until the bubble
inside the level
(A) is centered at zero (0).
3. Now check the horizontal
aim (C) and
adjust it as necessary.
The horizontal aiming
device is located on the
inboard side of each
lamp. Turn the horizontal
aiming screw
(D) until
the screw aligns with the
zero
(0).
4. Recheck the vertical aim level (A) to make sure it is
still correct after the horizontal aim adjustment.
Re-adjust as necessary.
6-38

Downloaded from www.Manualslib.com manuals search engine A CAUTION:
Poorly maintained and improperly used tires
are dangerous.
e
e
e
Overloading your tires can cause
overheating as
a result of too much friction.
You could have an air-out and a serious
accident. See “Loading Your Vehicle” in
the Index.
Underinflated tires pose the same danger as
overloaded tires. The resulting accident
could cause serious injury. Check all tires
frequently to maintain the recommended
pressure. Tire pressure should be checked
when your tires are cold.
Overinflated
tires are more likely to be
cut, punctured or broken by
a sudden
impact
-- such as when you hit a pothole.
Keep tires
at the recommended pressure.
CAUTION: (Continued)
I CAUTION: (Continued) I
0 Worn, old tires can cause accidents. If your
tread is badly worn, or if your tires have
been damaged, replace them.
See “Inflation
-- Tire Pressure” in this section
for inflation pressure adjustment for higher
speed driving.
Inflation -- Tire Pressure
The Tire-Loading Information label, which is located an
the rear edge of the driver’s door, shows the correct
inflation pressures
for your tires when they’re cold.
“Cold” means your vehicle has been sitting for at least
three hours or driven no more than
1 mile (1.6 km).
If you’ll be driving at high speeds (e.g., speeds of 100 mph
(160 km/h) or higher), where it is legal, set the cold
inflation pressure to the maximum inflation pressure
shown on the tire sidewall, or to
38 psi (265 Wa),
whichever is lower. See the example below. When you end
this high-speed driving, return to the cold inflation
pressure shown on the Tire-Loading Information label.
6-42

Downloaded from www.Manualslib.com manuals search engine Example:
You’ll find maximum load and inflation pressure
molded on the tire’s sidewall, in small letters, near the
rim flange. It will read something
like this: Maximum
load
690 kg (1521 lbs.) @ 300 kPa (44 psi) Max. Press.
For this example, you would set the inflation pressure
for high-speed driving at
38 psi (265 kPa).
NOTICE:
Don’t let anyone tell you that underinflation or
overinflation is
all right. It’s not. If your tires
don’t have enough
air (underinflation), you can
get the following:
4) Too much flexing
4) Too much heat
4) Tire overloading
Bad wear
Bad handling
a Bad fuel economy.
NOTICE: (Continued)
I NOTICE: (Continued)
If your tires have too much air (overinflation),
you can get the following:
Unusual wear
Bad handling
Rough ride
0 Needless damage from road hazards.
When
to Check
Check your tires once a month or more.
Don’t forget your compact spare tire. It should be at
60 psi (420 Pa).
How to Check
Use a good quality pocket-type gage to check tire
pressure. You can’t
tell if your tires are properly inflated
simply by looking at them. Radial tires may
look
properly inflated even when they’re underinflated.
Be sure to put the valve caps back on the valve stems.
They help prevent leaks by keeping out
dirt and moisture.
6-43

Downloaded from www.Manualslib.com manuals search engine Tire Inspection and Rotation
Tires should be rotated every 6,000 to S,O00 miles
(10 000 to 13 OOO km). Any time you notice unusual wear,
rotate
your tires as soon as possible and check wheel
alignment.
Also check for damaged tires or wheels. See
“When It’s Time for New Tires” and “Wheel
Replacement” later in
this section for more information.
The purpose of regular rotation is to achieve more
uniform wear for all tires on the vehicle. The first
rotation is the most important. See “Scheduled
Maintenance Services” in the Maintenance Schedule
booklet
for scheduled rotation intervals.
When rotating
your tires, always use the correct rotation
pattern shown here. Don’t include the compact spare tire in
your tire rotation.
After the tires have been rotated, adjust the front and
rear inflation pressures as shown on the Tire-Loading Information label. Make certain that all wheel nuts are
properly tightened. See “Wheel Nut Torque” in
the Index.
I
Rust or dirt on a wheel, or on the parts to which
it is fastened, can make wheel nuts become loose
after a time. The wheel could come
off and cause
an accident. When you change
a wheel, remove
any rust or dirt from places where the wheel
attaches to the vehicle. In an emergency, you can
use a cloth or
a paper towel to do this; but be
sure to use
a scraper or wire brush later, if you
need to, to get all the rust or dirt
off. (See
“Changing
a Flat Tire” in the Index.)
1
6-44

Downloaded from www.Manualslib.com manuals search engine When It’s Time for New Tires
One way to tell when it’s
time for new tires is to
check the treadwear
indicators, which will
appear when your tires have
only
1/16 inch (1.6 mm) or
less of tread remaining.
You need a new tire if any of the following statements
are true:
You can see the indicators at three or more places
around the tire.
You can see cord or fabric showing through the
tire’s rubber.
The tread or sidewall is cracked, cut or snagged deep
enough to show cord or fabric.
0 The tire has a bump, bulge or split.
0 The tire has a puncture, cut or other damage that
can’t be repaired well because of the size or location
of the damage.
Buying New Tires
To find out what kind and size of tires you need, look at
the Tire-Loading Information label.
The tires installed on your vehicle when it was new had
a Tire Performance Criteria Specification (TPC Spec)
number on each tire’s sidewall. When you get new tires,
get ones with that same TPC Spec number. That way
your vehicle will continue to have tires that are designed
to give proper endurance, handling, speed rating,
traction, ride and other things during normal service on
your vehicle. If your tires have an all-season tread
design, the TPC number will be followed by an
“MS”
(for mud and snow).
If you ever replace your tires with those not having a
TPC Spec number, make sure they are the same size,
load range, speed rating and construction type (bias,
bias-belted or radial) as your original tires.
6-45

Downloaded from www.Manualslib.com manuals search engine Care of Safety Belts
ep belts a :an and dry.
Cleaning the Outside of the
Windshield and Wiper Blades
Do not bleach or dye safety belts. If you do, it
may severely weaken them. In
a crash, they
might not be able to provide adequate protection.
Clean safety belts only with
mild soap and
lukewarm water.
Cleaning Glass Surfaces
Glass should be cleaned often. GM Glass Cleaner (GM
Part No. 1050427) or a liquid household glass cleaner
will remove normal tobacco smoke and dust films on
interior glass.
Don’t use abrasive cleaners on glass, because they may
cause scratches. Avoid placing decals on the inside rear
window, since they may have
to be scraped off later. If
abrasive cleaners are used on the inside
of the rear
window, an electric defogger element may be damaged.
Any temporary license should not be attached across the
defogger grid.
If the windshield is not clear after using the windshield
washer, or
if the wiper blade chatters when running, wax,
sap or other material may
be on the blade or windshield.
Clean the outside
of the windshield with GM
Windshield Cleaner, Bon Ami@ Powder (non-scratching
glass cleaning powder),
GM Part No. 105001 1. The
windshield is clean
if beads do not form when you rinse
it with water.
Grime fiom the windshield will stick to the wiper blades and affect their performance. Clean the blade by wiping
vigorously with a cloth soaked in full-strength windshield
washer solvent. Then rinse the blade with water.
Check the wiper blades and clean them as necessary;
replace blades that look worn.
Weatherstrips
Silicone grease on weatherstrips will make them last
longer, seal better, and not stick or squeak. Apply silicone
grease with
a clean cloth at least every six months. During
very cold, damp weather more fiequent application may be
required. (See “Recommended Fluids and Lubricants”
in
the Maintenance Schedule booklet.)

Downloaded from www.Manualslib.com manuals search engine Electrical System
Add-on a1 Equipment
NOTICE:
Don’t add anything electrical to your vehicle unless you check with your dealer first. Some
electrical equipment can damage your vehicle
and the damage wouldn’t be covered by your
warranty. Some add-on electrical equipment can
keep other components
from working as
they
should.
Your vehicle has an air bag system. Before attempting to
add anything electrical to your vehicle, see “Servicing
Your
Air Bag-Equipped Vehicle” in the Index.
Headlamp Wiring
The headlamp wiring has an individual fuse. An
electrical overload will cause the lamps to go on and off,
or in some cases to remain off. If this happens, have the
headlamp wiring checked right away.
Windshield Wiper Fuses
A circuit breaker protects the wiper motor. If the wiper
motor overheats due to heavy snow, the wipers will stop
until the motor cools and will then restart.
A Maxifuse@ powers the wiper motor. If the Maxifuse
blows, there is an electrical problem. Be sure to have
it fixed.
Power Windows and Other Power Options
Circuit breakers protect the power windows. When the
current load is
too heavy, the circuit breaker opens and
closes, protecting
the circuit until the problem is fixed or
goes away.
6-59

Downloaded from www.Manualslib.com manuals search engine Air Conditioning Refrigerants
hasn’t been routed through the seat cushion at all, it won’t be there to work for the next
passenger. The person sitting in that position
could be badly injured. After reinstalling the seat
cushion, always check to be sure that the
safety
belts are properly routed and are not twisted.
1.
2.
3.
4. Buckle the center passenger position safety belt, then
route the safety belts through the proper slots in the
seat cushion. Don’t let the safety belts get twisted.
Slide the rear of the cushion up and under the
seatback
so the rear-locating guides hook into the
wire loops on the back frame.
With the seat cushion lowered, push rearward and
then press down on the seat cushion until the spring
locks on both ends engage.
Check to make sure the safety belts are properly
routed and that no portion of any safety belt is trapped under the seat. Also make sure the seat
cushion is secured. Not all air conditioning refrigerants are the same.
If the air conditioning system in your vehicle needs
refrigerant, be sure the proper refrigerant is used.
If you’re not
sure, ask your dealer.
Normal Maintenance
Replacement Parts
Air Filter Element ............. AC Type A1208C
25096932
Fuel Filter Element
............ AC Type GF-627
25121942
Engine Oil Filter
................ AC Type PF-58 25014377
PCV Valve
. . ............ AC Type CV-774C
06487779
Spark Plugs
................. AC Type 41-950
5614236
Thermostat
.................... AC Type 13 1-66
3531407
Windshield Wiper Blade (Hook Type)
.............. .22 inches (56.5 cm)
6-68