2002 Lexus IS300 engine overheat

SWITCHES
31
CAUTION
Occupants must use caution when operating the seat
heater because they may experience minor burns even
at low temperatures. Use extra caution for;
Babies, small children, elderly persons, sick persons
or handicapped persons
 Persons who have delicate skin
 Persons who are exhausted
 Persons who have taken alcohol or drugs which
induce sleep (sleeping drug, cold remedy, etc.).
To prevent the seat from overheating, do not use the
seat heater with a blanket, cushion, or other insulating
objects which cover the seat.
NOTICE
Do not put unevenly weighted objects on the seat and do not stick sharp objects (needles, nails, etc.) intothe seat.
When cleaning the seats, do not use organicsubstances (paint thinner, benzine, alcohol,gasoline, etc.). They may damage the heater and seat
surface.
To prevent the battery from being discharged, turn the switches on when the engine is running.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
35
ENGINE COOLANT
TEMPERATURE GAUGE
SV13012

Normal range
The gauge indicates the engine coolant temperature when
the ignition switch is on. The engine operating
temperature will vary with changes in weather and engine
load.
If the needle points to the red zone or higher, stop your vehicle
and allow the engine to cool.
Your vehicle may overheat during severe operating conditions,
such as:
 Driving up a long hill on a hot day.
 Reducing speed or stopping after high speed driving.
 Idling for a long period with the air conditioning on in
stop±and±go traffic.
NOTICE
Do not remove the thermostat in the engine cooling
system as this may cause the engine to overheat. Thethermostat is designed to control the flow of coolantto keep the temperature of the engine within thespecified operating range.
Do not continue driving with an overheated engine.See ºIf your vehicle overheatsº on page 204.

STARTING AND DRIVING
164
THREE±WAY CATALYTICCONVERTER
SV31032
Three±way catalytic converters are emission control
devices installed in the exhaust system.
It looks somewhat like a muffler, but its purpose is to reduce
pollutants in the exhaust gas.
CAUTION
Keep people and combustible materials away from
the exhaust pipe while the engine is running. The
exhaust gas is very hot.
 Do not drive, idle or park your vehicle over anything
that might burn easily such as grass, leaves, paper or
rags.
NOTICE
A large amount of unburned gases flowing into the three±way catalytic converter may cause it to overheatand create a fire hazard. To prevent this and otherdamage, observe the following precautions:
Use only unleaded gasoline.
Do not drive with an extremely low fuel level; runningout of fuel could cause the engine to misfire, creatingan excessive load on the three±way catalyticconverter.
Do not allow the engine to run at idle speed for morethan 20 minutes.
Avoid racing the engine.
Do not push±start or pull±start your vehicle.
Do not turn off the ignition while the vehicle ismoving.
Keep your engine in good running order.Malfunctions in the engine electrical system,electronic ignition system or fuel system could cause
an extremely high three±way catalytic converter temperature.
If the engine becomes difficult to start or stallsfrequently, take your vehicle in for a check±up assoon as possible. Remember, your Lexus dealer
knows your vehicle and its three±way catalyticconverter system best.

STARTING AND DRIVING
169
If the weather is below freezing, let the engine warm up for a
few minutes before driving. Do not leave the vehicle while the
engine is warming up.
If the engine stalls ...
Simply restart it , using the correct procedure given in normal
starting.
If the engine will not start
See ºIf your vehicle will not startº on page 200.
NOTICE
Do not crank for more than 30 seconds at a time. This
may overheat the starter and wiring systems.
Do not race a cold engine.
If the engine becomes difficult to start or stallsfrequently, have the engine checked immediately.
AUTOMATIC TRANSMISSION
Your automatic transmission has a shift lock system to
minimize the possibility of incorrect operation. This
means you can only shift out of ºPº position when the
brake pedal is depressed with the ignition switch in ºONº
position. ( )
SV31020

STARTING AND DRIVING
176
(d) Using the º3º, º2º and ºLº positions
The º3º, º2º and ºLº positions are used for strong engine
braking as described previously.
With the selector lever in º3º, º2º or ºLº, you can start t\
he vehicle
in motion as with the lever in ºDº.
With the selector lever in º3º or º2º, the vehicle will star\
t in first
gear and automatically shift to the third or second gear.
With the selector lever in ºLº, the transmission is engaged in
the first gear.
NOTICE
Be careful not to over±rev the engine. Watch the tachometer to keep engine rpm from going into thered zone. The approximate maximum allowablespeed for each position is given below for yourreference:
º3º 124 km/h (78 mph)
. . . . . . . . . . . . . . . . . . .
º2º 81 km/h (51 mph)
. . . . . . . . . . . . . . . . . . .
ºLº 52 km/h (33 mph)
. . . . . . . . . . . . . . . . . . .
Do not continue hill climbing or hard towing for a long
time in the º3º, º2º or ºLº position. This may causesevere automatic transmission damage from
overheating. To prevent such damage, º4º positionshould be used in hill climbing or hard towing.
(e) Backing up
SV31025

1Brake pedal 2ºRº (Reverse) position
1. Bring the vehicle to a complete stop.
2. With the brake pedal held down with your foot, shift the
selector lever to the ºRº position.
NOTICE
Never shift into reverse while the vehicle is moving.

STARTING AND DRIVING
177
(f) Parking
SV31026

1Brake pedal 2Parking brake lever
3ºPº (Park) position
1. Bring the vehicle to a complete stop.
2. Pull the parking brake lever up fully to securely apply the
parking brake.
3. With the brake pedal held down with your foot, shift the
selector lever to the ºPº position.
CAUTION
Never attempt to move the selector lever into ºPº under
any circumstances while the vehicle is moving. Serious
mechanical damage and loss of vehicle control may
result.
(g) Good driving practice
If the transmission repeatedly shifts up and down between the
fourth and overdrive gears when climbing a gentle slope, shift
the selector lever to the ºMº position and select the forth gear
by pushing the transmission switch. Be sure to shift the
selector lever to the ºDº position after climbing the slope.
CAUTION
Always keep your foot on the brake pedal while stopped
with the engine running. This prevents the vehicle from
creeping.
NOTICE
Do not hold the vehicle on an upgrade with the accelerator pedal. This can cause the transmission tooverheat. Always use the brake pedal or parking brake.

DRIVING TIPS
193
TIPS FOR DRIVING IN VARIOUSCONDITIONS

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.

Do not leave your vehicle unattended while the
engine is running.

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 175.

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
wet. 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.

DRIVING TIPS
197


Avoid unnecessary stopping and braking. Maintain a
steady pace. Try to time the traf fic signals 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
premature 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 fuel 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 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.