lexus LS400 1998 Electrical Components / LEXUS 1998 LS400 OWNER'S MANUAL (OM50498U)

MAINTENANCE
216Parking brake
Check that the pedal has the proper travel and that, on a safe incline,
your vehicle is held securely with only the parking brake applied.
Automatic transmission ”Park” mechanism
On a safe incline, check that your vehicle is held securely with the
selector lever in ”P” position and all brakes released.
Engine compartment
Items listed below should be checked from time to time, e.g. each
time when refueling.
Washer fluid
Make sure there is sufficient fluid in the tank. See page 261 for
additional information.
Engine coolant level
Make sure the coolant level is between the Upper and Lower lines
on the seethrough reservoir when the engine is cold. See page 233
for additional information.
Battery
Your Lexus has a maintenance free battery. You do not have to add
distilled water. For longer life of the battery, however, see page 253
for additional information.
Brake fluid level
Make sure the brake fluid level is correct. See page 239 for
additional information.Engine oil level
Check the level on the dipstick with the engine turned off and the
vehicle parked on a level spot. See page 230 for additional
information.
Power steering fluid level
Check the level on the dipstick. The level should be in the ”HOT”
or ”COLD” range depending on the fluid temperature. See page 240
for additional information.
Exhaust system
Look for cracks, holes and loose supports. If you notice any change
in the sound of the exhaust or smell exhaust fumes, have the cause
located and corrected immediately. (See engine exhaust cautions in
Section 31.)

MAINTENANCE
217
DOES YOUR VEHICLE NEED
REPAIRING?
Be on the alert for changes in performance and sounds, and visual
tipoffs that indicate service is needed. Some important clues are:
Engine missing, stumbling, or pinging
Appreciable loss of power
Strange engine noises
A fluid leak under the vehicle (However, water dripping from the
air conditioning after use is normal.)
Change in exhaust sound (This may indicate a dangerous carbon
monoxide leak. Drive with the windows open and have the
exhaust system checked immediately.)
Flatlooking tires, excessive tire squeal when cornering, uneven
tire wear
Vehicle pulls to one side when driving straight on a level road
Strange noises related to suspension movement
Loss of brake effectiveness, spongy feeling brake pedal, pedal
almost touches floors, vehicle pulls to one side when braking
Engine coolant temperature continually higher than normal
If you notice any of these clues, take your vehicle to your Lexus
dealer as soon as possible. It probably needs adjustment or repair.
CAUTION
Do not continue driving with the vehicle unchecked. It could
result in serious vehicle damage and possibly personal injury.

SECTION 6 1
218
SERVICE PROCEDURES AND
SPECIFICATIONS
Introduction
Vehicle identification 219. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine compartment overview 220. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Doityourself service precautions 221. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts and tools 222. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INTRODUCTION
219
VEHICLE IDENTIFICATION
61L002
The vehicle identification number (VIN) is the legal identifier for
your vehicle. This number is on the left top of the instrument
panel and can be seen through the windshield from outside.
This is the primary identification number for your Lexus. It is used
in registering the ownership of your vehicle.
61L003
The vehicle identification number (VIN) is also on the Certification
Label.
61L0042
The engine number is stamped on the engine block as shown.

61L005-5
INTRODUCTION
220
ENGINE COMPARTMENT OVERVIEW
1 Brake fluid reservoir
2 Fuse box
3 Battery
4 Washer fluid tank
5 Engine oil level dipstick
6 Engine oil filler cap
7 Power steering fluid
reservoir
8 Engine coolant reservoir

INTRODUCTION
221
DOITYOURSELF SERVICE
PRECAUTIONS
If you perform maintenance yourself, be sure to follow the
correct procedure given in this Section.
You should be aware that improper or incomplete servicing may
result in operating problems.
Performing doityourself maintenance during the warranty period
may affect your warranty coverage. Read the separate Lexus
Warranty statement for details and suggestions.
This Section gives instructions only for those items that are
relatively easy for an owner to perform. As explained in Section 5,
there are still a number of items that must be performed by a qualified
technician with special tools.
For information on tools and parts for doityourself maintenance,
see ”Parts and tools”.
Utmost care should be taken when working on your vehicle to
prevent accidental injury. Here are a few precautions that you should
be especially careful to observe:
CAUTION
When the engine is running, keep hands, clothing, and tools
away from the moving fan and engine drive belt.
(Removing rings, watches, and ties is advisable.)
Right after driving, the engine compartment the engine,
radiator, exhaust manifold and power steering fluid
reservoir, etc. will be hot. So be careful not to touch them.
Oil and other fluids may also be hot.
Do not smoke, cause sparks or allow open flames around
fuel or the battery. Their fumes are flammable.
Be extremely cautious when working on the battery. It
contains poisonous and corrosive sulfuric acid.
Do not get under your vehicle with just the body jack
supporting it. Always use automotive jack stands or other
solid supports.
Be sure the ignition is off if you work near the electric
cooling fan or radiator grille. With the ignition on, the
electric cooling fan may automatically start to run if the air
conditioning is on and/or if the coolant temperature is high.
Use eye protection whenever you work on or under your
vehicle where you may be exposed to flying or falling
material, fluid spray, etc.
NOTICE

INTRODUCTION
222Remember that battery and ignition cables carry high
currents or voltages. Be careful of accidentally causing a
short circuit.
Before closing the engine hood, check to see that you have not
forgotten any tools, rags, etc.
Do not drive with the air cleaner removed, or excessive engine
wear could result. Also backfiring could cause a fire in the
engine compartment.
Do not overfill automatic transmission fluid, or the
transmission could be damaged.
Be careful not to scratch the glass surface with the wiper
frame.
PARTS AND TOOLS
Here is a list of parts and tools you will need to perform
doityourself maintenance. Remember all Lexus parts are
designed in metric sizes, so your tools must be metric.
Checking the engine oil level
Parts (if level is low):
Use API grade SH, ”EnergyConserving II” or SJ,
”EnergyConserving” multigrade engine oil or ILSAC
multigrade engine oil. For recommended oil viscosity, see page
232.
Tools:
Rag or paper towel
Funnel (only for adding oil)
Checking the engine coolant level
Parts (if level is low):
Ethyleneglycol coolant
Demineralized or distilled water
Tools:
Funnel (only for adding coolant)

INTRODUCTION
223
Checking brake fluid
Parts (if level is low):
FMVSS No. 116 DOT 3 or SAE J1703 brake fluid
Tools:
Funnel (only for adding fluid)
Checking power steering fluid
Parts (if level is low):
Automatic transmission fluid DEXRON
II or III
Tools:
Rag or paper towel
Funnel (only for adding fluid)
Checking battery condition
Nonmaintenance batteries
Tools:
Warm water
Baking soda
Grease
Conventional wrench (for terminal clamp bolts)
Maintenance type batteries
Parts (if level is low):
Distilled waterTools:
Warm water
Baking soda
Grease
Conventional wrench (for terminal clamp bolts)
Coin (for vent plugs)
Funnel (only for adding distilled water)
Checking and replacing the blade type fuses
Parts (if replacement is necessary):
Fuse with same amperage rating as original
Checking the cartridge type fuses
Parts (if replacement is necessary):
Genuine Lexus fuse or equivalent with same amperage rating as
original
Adding washer fluid
Parts:
Water
Washer fluid containing antifreeze (for winter use)
Tools:
Funnel

SECTION 6 2
224
SERVICE PROCEDURES AND
SPECIFICATIONS
Engine
Specifications 225. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel 227. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Facts about engine oil consumption 229. . . . . . . . . . . . . . . . . . . . . . . . . . .
Used engine oil 230. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the engine oil level 230. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the engine coolant level 233. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spark plugs 234. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

62L0051
Temperature range anticipated before next oil change
ENGINE
225
SPECIFICATIONS
GENERAL
Model
Type
Bore and stroke
Displacement
Valve clearance (engine cold)
Intake
Exhaust
Drive belt tension
1UZFE
8 cylinder V type, 4 cycle, gasoline
87.5 X 82.5 mm (3.44 X 3.25 in.)
3969 cm
3 (242.1 cu.in.)
0.15 0.25 mm (0.006 0.010 in.)
0.25 0.35 mm (0.010 0.014 in.)
Automatic adjustment
LUBRICATION SYSTEM
Oil capacity
Drain and refill
with filter
without filter
Oil grade

Recommended oil viscosity (SAE):
5.6 L (5.9 qt., 4.9 lmp.qt.)
5.3 L (5.6 qt., 4.7 lmp.qt.)
API SH, ”EnergyConserving II” or SJ, ”EnergyConserving”
multigrade engine oil or ILSAC multigrade engine oil