brake lexus LS400 1999 Electrical Components / LEXUS 1999 LS400 (OM50514U) Service Manual

DRIVING TIPS
323
BREAK±IN PERIOD
Drive gently and avoid high speeds.
You need not follow a break±in schedule with your new
Lexus. But following a few simple tips for the first 1600
km (1000 miles) can add to the future economy and long
life of your vehicle:
Do not drive over 88 km/h (55 mph).
 Avoid overrevving. Maintain engine speed between
2000 and 4000 rpm.
 Avoid full±throttle starts.
 Try to avoid hard stops during the first 300 km (200
miles).
 Do not drive for a long time at any single speed, either
fast or slow.
 Do not tow a trailer during the first 800 km (500 miles).
OPERATION IN FOREIGN
COUNTRIES
If you plan to drive your Lexus in another country ...
First, comply with the vehicle registration laws.
Second, confirm the availability of the correct fuel
(unleaded and minimum octane rating).
TIPS FOR DRIVING IN VARIOUS CONDITIONS
Always slow down in gusty crosswinds. This will
allow you much better control.
 Drive slowly onto curbs and, if possible, at a right
angle. Avoid driving onto high, sharp±edged objects
and other road hazards. Failure to do so can lead to
severe tire damage resulting in tire bursts.
 When parking on a hill, turn the front wheels until they
touch the curb so that the vehicle will not roll. Apply
the parking brake, and place the transmission in ºPº.
If necessary, block the wheels.
 Washing your vehicle or driving through deep water
may get the brakes wet. To see whether they are wet,
check that there is no traffic near you and then press
the pedal lightly. If you do not feel a normal braking
force, the brakes are probably wet. To dry them, drive
the vehicle cautiously while lightly pressing the brake
pedal with the parking brake applied. If they still do
not work safely, pull to the side of the road and call a
Lexus dealer for assistance.
CAUTION
 Before driving off, make sure the parking brake is
fully released and that the parking brake reminder
light is off.

DRIVING TIPS
324
Do not rest your foot on the brake pedal while
driving. It can cause dangerous overheating,
needless wear, and poor fuel economy.
 To drive down a long or steep hill, reduce your
speed and downshift. Remember, if you ride
the brakes excessively, they may overheat and
not work properly. See page 288.
 Be careful when accelerating, upshifting,
downshifting or braking on a slippery surface.
The abrupt change in engine speed, such as
sudden acceleration or engine braking, could
cause the vehicle to spin or skid.
 Do not drive in excess of the speed limit. Even
if the legal speed limit permits it, do not drive
over 140 km/h (85 mph) unless your vehicle has
high±speed capability tires. Driving over 140
km/h (85 mph) may result in tire failure, loss of
control and possible injury. Be sure to consult
a tire dealer to determine whether the tires on
your vehicle are high±speed capability tires or
not before driving at such speeds.
 Do not continue normal driving when the
brakes are w et. If they are wet, your vehicle will
require a longer stopping distance, and it may
pull to one side when the brakes are applied.
Also, the parking brake will not hold the vehicle
securely.WINTER DRIVING TIPS
Make sure you have a proper freeze protection of
engine coolant.
Your coolant must contain ethylene±glycol type coolant
for a proper corrosion protection of aluminum
components. Use ºToyota Long Life Coolantº or
equivalent. See ºChecking the engine coolant levelº on
page 409 for instructions.
NOTICE
Do not use alcohol type antifreeze or plain water
alone.
When it is extremely cold, we recommend to use 60%
solution for your Lexus, to provide protection down to
about ±50 C (±58 F). Do not use more than 70%
solution for better coolant performance.
Check the condition of the battery and cables.
Cold temperatures reduce the capacity of any battery, so
it must be in top shape to provide enough power for
winter starting. Page 443 tells you how to visually
inspect the battery. Your Lexus dealer and most service
stations will be pleased to check the battery charge
level.
Make sure the engine oil viscosity is suitable for the
cold weather.

DRIVING TIPS
325
See page 408 for recommended viscosity. Leaving a
heavy summer oil in your vehicle during winter months
may cause harder starting. If you are not sure about
which oil to use, call your Lexus dealer ± they will be
pleased to help.
Check the electronic ignition system for loose
connections or obvious damage.
Keep the door locks from freezing.
Squirt lock de±icer or glycerine into the locks to keep
them from freezing.
Use a washer fluid containing an antifreeze solution.
This product is available at your Lexus dealer and most
auto parts stores. Follow the manufacturer's directions
for how much to mix with water.
NOTICE
Do not use engine antifreeze or any other
substitute because it may damage your vehicle'spaint.
Do not use your parking brake when there is a
possibility it could freeze.
When parking, put the transmission into ºPº and block
the front wheels. Do not use the parking brake, or snow
or water accumulated in and around the parking brake
mechanism may freeze the parking brake, making it hard to release.
Keep ice and snow from accumulating under the
fenders.
Ice and snow built up under your fenders can make
steering difficult. During bad winter driving, stop and
check under the fenders occasionally.

DRIVING TIPS
331
Brakes and safety chains
Lexus recommends trailers with brakes that
conform to any applicable federal and
state/provincial regulations.
 A safety chain must always be used between the
towing vehicle and the trailer. Leave sufficient
slack in the chain for turns. The chain should
cross under the trailer tongue to prevent the
tongue from dropping to the ground in case it
becomes damaged or separated. For correct
safety chain procedures, follow the hitch or trailer
manufacturer's recommendations.
CAUTION
 If the total trailer weight exceeds 450 kg (1000 lb.),
trailer brakes are required.
 Never tap into your vehicle's hydraulic system as it
will lower its braking effectiveness.
 Never tow a trailer without using a safety chain
securely attached to both the trailer and the vehicle.
If damage occurs to the coupling unit or hitch ball,
there is possible danger of the trailer wandering over
into another lane.

DRIVING TIPS
334
Avoid jerky steering and sharp turns. The trailer could
hit your vehicle in a tight turn. Slow down before
making a turn to avoid the need of sudden braking.
 Remember that when making a turn, the trailer
wheels will be closer than the vehicle wheels to the
inside of the turn. Therefore, compensate for this by
making a larger than normal turning radius with your
vehicle.
 Crosswinds and rough roads will adversely affect
handling of your vehicle and trailer, causing sway.
Pay attention to the rear from time to time to prepare
yourself for being passed by large trucks or buses,
which may cause your vehicle and trailer to sway. If
swaying happens, firmly grip the steering wheel and
reduce speed immediately but gradually. Never
increase speed. If it is necessary to reduce speed,
brake slowly. Steer straight ahead. If you make no
extreme correction with the steering or brakes, your
vehicle and trailer will stabilize.
 Be careful when passing other vehicles. Passing
requires considerable distance. After passing a
vehicle, do not forget the l ength of your trailer and be
sure you have plenty of room before changing lanes.
 In order to maintain efficient engine braking and
electrical charging performance, do not use
overdrive. Transmission must be in the º4º position. 
Because of the added load of the trailer, your vehicle's
engine may overheat on hot days (at temperatures
over 30C [85F]) when going up a long or steep
grade with a trailer. If the engine coolant temperature
gauge indicates overheating, immediately turn off the
air conditioning (if in use), pull your vehicle off the
road and stop in a safe spot. See ºIf your vehicle
overheatsº on page 347 of this manual.
 Always place wheel blocks under both the vehicle
and trailer wheels when parking. Apply the parking
brake firmly. Put the transmission in ºPº. Avoid
parking on a slope with a trailer, but if it cannot be
avoided, do so only after performing the following:
1. Apply the brakes and keep them applied.
2. Have someone place wheel blocks under both the
vehicle and trailer wheels.
3. When the wheel blocks are in place, release your
brakes slowly until the blocks absorb the load.
4. Apply the parking brake firmly.
5. Shift into ºPº and turn off the engine.

DRIVING TIPS
335
When restarting out after parking on a slope:
1. With
the transmission in ºPº position, start the engine.
Be sure to keep the brake pedal depressed.
2. Shift into the º3º, º2º, ºLº or ºRº position.
3. Release the parking brake and brake pedal and
slowly pull or back away from the wheel blocks. Stop
and apply your brakes.
4. Have someone retrieve the blocks.
CAUTION
 Do not exceed 72 km/h (45 mph) or the posted towing
speed limit, whichever is lower. Because instability
(swaying) of a towing vehicle±trailer combination
usually increases as the speed increases, exceeding
72 km/h (45 mph) may cause loss of control.
 Slow down and downshift before descending steep
or long downhill grades. Do not make sudden
downshifts.
 Avoid holding the brake pedal down too long or too
frequently. This could cause the brakes to overheat
and result in reduced braking efficiency.

DRIVING TIPS
337

Avoid unnecessary stopping and braking.
Maintain a steady pace. Try to time the traffic si gnals
so you only need to stop as little as possible or take
advantage of through streets to avoid traffic lights.
Keep a proper distance from other vehicles to avoid
sudden braking. This will also reduce wear on your
brakes.
 Avoid heavy traffic or traffic jams whenever
possible.
 Do not rest your foot on the brake pedal. This
causes needless wear, overheating and poor fuel
economy.
 Maintain a moderate speed on highways. The
faster you drive, the greater the fuel consumption. By
reducing your speed, you will cut down on fuel
consumption.
 Keep the front wheels in proper alignment. Avoid
hitting the curb and slow down on rough roads.
Improper alignment not only causes faster tire wear
but also puts an extra load on the engine, which, in
turn, wastes fuel.
 Keep the bottom of your vehicle free from mud,
etc. This not only lessens weight but also helps
prevent corrosion.
 Keep your vehicle tuned±up and in top shape. A
dirty air cleaner, improper valve clearance, dirty
plugs, dirty oil and grease, brakes not adjusted, etc.
all lower engine performance and contribute to poor

DRIVING TIPS
338fuel economy. For longer life of all parts and lower
operating costs, keep all maintenance work on
schedule, and if you often drive under severe
conditions, see that your vehicle receives more
frequent maintenance. (For scheduled maintenance
information, please refer to the separate ºOwner's
Manual Supplement/Maintenance Scheduleº.)
CAUTION
Never 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
341
IF YOUR ENGINE STALLSWHILE 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 ºIf your vehicle will not
startº.
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.

IN CASE OF AN EMERGENCY
348
When the engine overheats
Pull safely off the road, stop the vehicle and turn on your
emergency flashers. Put the transmission in ºPº and
apply the parking brake.
A: If steam is coming from your engine:
Turn off the engine. Leave the hood closed until there
is no sign of steam or coolant. Your engine could have
been seriously damaged already. Call your Lexus
dealer for assistance.
CAUTION
To help avoid personal injury, keep the hood closed until
there is no steam. Escaping steam or coolant is sign of
very high pressure.