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1742-1. Driving procedures
LX570_OM_OM60L21U_(U) NOTICE■
If you get a flat tire while driving
A flat or damaged tire may cause the following situations. Hold the steering wheel
firmly and gradually press the brak e pedal to slow down the vehicle.●
It may be difficult to control your vehicle. ●
The vehicle will make abnormal sounds. ●
The vehicle will behave abnormally.
Replace a flat tire with a new one. ( P. 8 5 4 )■
When encountering flooded roads
Do not drive on a road that has flooded after heavy rain etc. Doing so may cause the
following serious damage to the vehicle. ●
Engine stalling ●
Short in electrical components ●
Engine damage caused by water immersion
In the event that you drive on a flooded road and the vehicle is flooded, be sure to
have your Lexus dealer check the following.●
Brake function ●
Changes in quantity and quality of oil an d fluid used for the engine, transmission,
transfer, differentials, etc. ●
Lubricant condition for the propeller shaft, bearings and suspension joints (where
possible) and the function of all joints, bearings, etc.
Page 325 of 956

3252-4. Using other driving systems
2
When driving
LX570_OM_OM60L21U_(U) ■
In the following cases the 4-Wheel AHC will not operate ●
The brake pedal has been depressed for a few seconds or longer while the vehi-
cle is stopped. ●
Vehicle height control has not been frequently used. ●
The suspension fluid temperature is lower than -22°F (-30°C). ●
There is ice on the suspension. ●
Driving on bumpy roads which may cause the suspension to fully elongate. ●
If the steering wheel is abruptly turned more than 3/4 of a revolution with the
center differential lock system activated.■
Cold weather operation
It may take longer for the vehicle height to change if the suspension fluid tempera-
ture drops below 5°F (-15°C).
The 4-Wheel AHC does not operate when the suspension fluid temperature drops
below -22°F (-30°C). ●
In this case, even if the height select switch is pressed, the vehicle height will not
change. Once the vehicle has been driven for a short time and the suspension
fluid has been warmed to within normal operating limits, the 4-Wheel AHC will
begin operating and the vehicle height wi ll automatically change to the selected
mode. ●
When the suspension fluid is around -22°F (-30°C), the vehicle height may not
be able to be raised, even if the 4-Wheel AHC is operating. In this case, pull the
height select switch to “ ” then push to “ ” after driving for a short time longer
to select the desired vehicle height.■
Parking and stopping tips ●
If you immediately stop the engine after off-road driving, the vehicle height may
gradually lower. When parking, make su re there is nothing under the vehicle
that may come in contact with the underbody. The vehicle will return to the set
height when the engine is started. ●
The vehicle height may change as the temperature changes when the engine is
stopped. The vehicle will return to the set height when the engine is started.
Page 741 of 956
7394-2. Maintenance
4
Maintenance and care
LX570_OM_OM60L21U_(U) General maintenance
Engine compartment Items Check points
Battery • Maintenance-free ( P. 7 5 8 )
Brake fluid • At the correct level? ( P. 7 5 5 )
Engine coolant • At the correct level? ( P. 7 5 3 )
Engine oil • At the correct level? ( P. 74 9 )
Exhaust system • No fumes or strange sounds?
Power steering fluid • At the correct level? ( P. 7 5 7 )
Radiator/condenser/hoses • Not blocked with foreign matter?
( P. 7 5 4 )
Wa s h e r f l u i d • At the correct level? ( P. 76 1 )Listed below are the general maintenance items that should be performed
at the intervals specified in the “Warranty and Services Guide” or
“Owner’s Manual Supplement”. It is recommended that any problem you
notice should be brought to the attent ion of your Lexus dealer or qualified
service shop for advice.
Page 745 of 956
7434
Maintenance and care
LX570_OM_OM60L21U_(U) 4-3. Do-it-yourself maintenance
Do-it-yourself service precautions If you perform maintenance yourself, be sure to follow the correct proce-
dures given in these sections.
Items Pa r t s a n d t o o l s
Battery condition ( P. 7 5 8 ) •Warm water
• Baking soda
•Grease
• Conventional wrench
(for terminal clamp bolts)
Brake fluid level ( P. 7 5 5 ) • FMVSS No.116 DOT 3 or SAE
J1703 brake fluid
•Rag or paper towel
• Funnel (used only for adding brake
fluid)
Engine coolant level ( P. 7 5 3 ) • “Toyota Super Long Life Coolant”
or similar high quality ethylene gly-
col based non-silicate, non-amine,
non-nitrite and non-borate coolant
with long-life hybrid organic acid
technology.
For the U.S.A.:
“Toyota Super Long Life Coolant”
is pre-mixed with 50% coolant and
50% deionized water.
For Canada:
“Toyota Super Long Life Coolant”
is pre-mixed with 55% coolant and
45% deionized water.
• Funnel (used only for adding cool-
ant)
Page 749 of 956
7474-3. Do-it-yourself maintenance
4
Maintenance and care
LX570_OM_OM60L21U_(U) Engine compartment
Power steering fluid reservoir
( P. 7 5 7 )
Engine oil level dipstick
( P. 74 9 )
Engine oil filler cap
( P. 750)
Brake fluid reservoir
( P. 755) Fuse box ( P. 7 8 2 )
Washer fluid tank ( P. 76 1 )
Battery ( P. 7 5 8 )
Cooling fans
Condenser ( P. 7 5 4 )
Radiator ( P. 7 5 4 )
Engine coolant reservoir
( P. 753)
Page 757 of 956
7554-3. Do-it-yourself maintenance
4
Maintenance and care
LX570_OM_OM60L21U_(U) Brake fluid
■ Checking fluid level
The brake fluid level should be
between the “MAX” and “MIN”
lines on the tank.
MAX
MIN
Make sure to check the fluid type and prepare the necessary items.
■ Adding fluid
■ Refilling brake fluid
Turn the “ENGINE START STOP” switch OFF.
Depress the brake pedal more than 40 times.
Remove the reservoir cap by ha nd. Add brake fluid up to the
“MAX” line.If you do not follow the procedure above, the reservoir may overflow.Fluid type FMVSS No.116 DOT 3 or SAE J1703 brake fluid
Items Clean funnel
■
Brake fluid can absorb moisture from the air
Excess moisture in the fluid can cause a dangerous loss of braking efficiency. Use
only newly opened brake fluid. STEP 1
STEP 2
STEP 3
Page 758 of 956
7564-3. Do-it-yourself maintenance
LX570_OM_OM60L21U_(U) CAUTION■
When filling the reservoir
Take care because brake fluid can harm your hands or eyes and damage painted
surfaces. If fluid gets in your eyes, flush your eyes with clean water immediately. If
you still experience discomfort, see a doctor.
NOTICE■
If the fluid level is low
It is normal for the brake fluid level to go down slightly as the brake pads wear or
when the fluid level in the accumulator is high.
If the reservoir needs frequent refilli ng, it may indicate a serious problem.
Page 821 of 956

5
When trouble arises
8195-1. Essential information
LX570_OM_OM60L21U_(U) If you think something is wrong If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
■ Visible symptoms
● Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)
● Flat-looking tires or uneven tire wear
● Engine coolant temper ature gauge needle continually points
higher than normal
● Engine oil pressure gauge continually points lower than normal.
● Voltmeter continually points higher or lower than normal.
■ Audible symptoms
● Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the engine
■ Operational symptoms
● Engine missing, stumbling or running rough
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, sp ongy feeling, pedal almost touches
the floor