power steering lexus LS400 1998 Engine / LEXUS 1998 LS400 OWNER'S MANUAL (OM50498U)

DRIVING TIPS
190Never turn off the engine to coast down hills. Your power
steering and brake booster will not function without the
engine running. Also, the emission control system operates
properly only when the engine is running.

IN CASE OF AN EMERGENCY
193
IF YOUR ENGINE STALLS WHILE
DRIVING
If your engine stalls while driving . . . .
1. Reduce your speed gradually, keeping a straight line. Move
cautiously off the road to a safe place.
2. Turn on your emergency flashers.
3. Try starting the engine again.
If the engine will not start, see ”If your vehicle will not start”.
CAUTION
If the engine is not running, the power assist for the brakes and
steering will not work, so steering and braking will be much
harder than usual.
IF YOUR VEHICLE WILL NOT
START
(a) Simple checks
Before making these checks, make sure you have followed the
correct starting procedure instructions in ”How to start the engine”
on page 159 and that you have sufficient fuel. Since your vehicle is
equipped with the engine immobiliser system, also check whether
the other keys will start the engine. If they work, your key may be
broken. Have the key checked at your Lexus dealer. If none of your
keys work, the system is possibly broken. Call your Lexus dealer.
See ”Keys” on page 8.If the engine is not turning over or is turning over too slowly
1. Check that the battery terminals are tight and clean.
2. If the battery terminals are O.K., switch on the interior light.
3. If the light is out, dim or goes out when the starter is cranked, the
battery is discharged. You may try jump starting. See ”(c) Jump
starting” for further instruction.
If the light is O.K., but the engine still will not start, it needs
adjustment or repair. Call a Lexus dealer, Roadside Assistance or
Customer Service Assistance. (See ”Foreword”.)
NOTICE
Do not pull or pushstart the vehicle. It may damage the
vehicle or cause a collision when the engine starts. Also the
threeway catalytic converter may overheat and become a fire
hazard.
If the engine turns over at its normal speed but will not start
1. The engine may be flooded because of repeated cranking. See
”(b) Starting a flooded engine” for further instructions.
2. If the engine still will not start, it needs adjustment or repair. Call
a Lexus dealer, Roadside Assistance or Customer Service
Assistance. (See ”Foreword”.)

IN CASE OF AN EMERGENCY
209
CAUTION
Use extreme caution when towing the vehicle. Avoid sudden
starts or erratic driving maneuvers which would place
excessive stress on the emergency towing eyelet and towing
cable or chain. The eyelet and towing cable or chain may
break and cause serious injury or damage.
NOTICE
Use only a cable or chain specifically intended for use in towing
vehicles. Securely fasten the cable or chain to the towing eyelet
provided.
Before towing, release the parking brake and put the transmission in
”N”. The ignition key must be in ”ACC” (engine off) or ”ON”
(engine running).
CAUTION
If the engine is not running, the power assist for the brakes and
steering will not work so steering and braking will be much
harder than usual.
IF YOU CANNOT SHIFT
AUTOMATIC TRANSMISSION
SELECTOR LEVER
40L025-3
If you cannot shift the selector lever, use the shift lock override
button as follows:
1
Turn the ignition key to ”LOCK” or ”ACC”. Make sure the
parking brake is applied. Pry up the cover with a flatbladed
screwdriver or equivalent.

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.)

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
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 3
236
SERVICE PROCEDURES AND
SPECIFICATIONS
Chassis
Specifications 237. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking brake fluid 239. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking power steering fluid 240. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking tire pressure 241. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rotating tires 242. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking and replacing tires 243. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing snow tires and chains 245. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing wheels 247. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Aluminum wheel precautions 247. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suspension and chassis 247. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CHASSIS
238 STEERING
Freeplay
Power steering fluid
Less than 30 mm (1.2 in.)
Automatic transmission fluid DEXRONII or III
TIRES AND WHEELS
Tire size
Tire inflation pressure
Recommended cold tire inflation pressure
Vehicle load up to four occupants
Vehicle loaded up to vehicle capacity weight
Wheel size
Wheel nut torque
P225/60R16 97V
Front 200 kPa (2.0 kgf/cm
2
or bar, 29 psi)
Rear 200 kPa (2.0 kgf/cm2 or bar, 29 psi)
Front 220 kPa (2.2 kgf/cm
2 or bar, 32 psi)
Rear 220 kPa (2.2 kgf/cm2 or bar, 32 psi)
For sustained high speeds above 160 km/h (100 mph), in
countries where such speeds are permitted by law, add 80 kPa (0.9
kgf/cm
2, 0.8 bar, 12 psi) to the front tires and rear tires, but never
exceed the maximum cold tire pressure molded on the tire
sidewall.
16 x 7 JJ
103 N·m (10.5 kgf·m, 76 ft·lbf.)

CHASSIS
240
CHECKING POWER STEERING
FLUID
63L0021
Check the fluid level on the dipstick. If necessary, add automatic
transmission fluid DEXRONII or III.
If the vehicle has been driven around 80 km/h (50 mph) for 20
minutes (a little more in frigid temperatures), the fluid is hot (60C
8 0C or 140F 175F). You may also check the level when the
fluid is cold (about room temperature, 10C 30C or 50F 85F)
if the engine has not been run for about five hours.
63L0031
1
If cold O.K. 2
If hot O.K. 3
Add fluid
1. Clean all dirt off the reservoir.
2. Remove the filler cap by turning it counterclockwise and wipe the
dipstick clean.
3. Reinstall the filler cap.
4. Remove the filler cap again and look at the fluid level. If the fluid
is cold, the level should be in the ”COLD” range on the dipstick.
Similarly, if it is hot, the fluid level should be in the ”HOT” range.
If the level is at the low side of either range, add automatic
transmission fluid DEXRON
II or III to bring the level within the
range.
5. After replacing the filler cap, visually check the steering box case,
vane pump and hose connections for leaks or damage.