brake Lexus GX460 2014 Using the air conditioning system and defogger / LEXUS 2014 GX460 (OM60K80U) Repair Manual

GX460_OM_OM60K80U_(U)
3674-6. Driving tips
4
Driving
Accelerate the vehicle slowly, keep a safe distance between you and the vehicle
ahead, and drive at a reduced speed suitable to road conditions.
Park the vehicle and move the shift lever to P without setting the parking brake.
The parking brake may freeze up, preventing it from being released. If necessary,
block the wheels to prevent in advertent sliding or creeping.
Use the correct tire chain size when mounting the snow chains.
Chain size is regulated for each tire size. Side chain
(0.20 in. [5 mm] in diameter)
Cross chain
(0.25 in. [6.3 mm] in diameter)
Regulations regarding the use of tire chains vary depending on location and type
of road. Always check local regulations before installing chains.
■Tire chain installation
Observe the following precautions wh en installing and removing chains:
●Install and remove tire chains in a safe location.
●Install tire chains on the rear tires. Do not install tire chains on the front tires.
●Install tire chains on rear tires as tightly as possible. Retighten chains after driving 1 /4 -
1 /2 mile (0.5 - 1.0 km).
●Install tire chains following the instru ctions provided with the tire chains.
When driving the vehicle
When parking the vehicle
Selecting tire chains
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2
Regulations on the use of tire chains

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GX460_OM_OM60K80U_(U)4-6. Driving tips
CAUTION
■Off-road driving precautions
Always observe the following precautions to minimize the risk of death, serious injury
or damage to your vehicle:
●Drive carefully when off the road. Do not ta
ke unnecessary risks by driving in danger-
ous places.
●Do not grip the steering wheel spokes when driving off-road. A bad bump could jerk
the wheel and injure your hands. Keep both hands and especially your thumbs on the
outside of the rim.
●Always check your brakes for effectivenes s immediately after driving in sand, mud,
water or snow.
●After driving through tall grass, mud, rock, sand, rivers, etc., check that there is no
grass, bush, paper, rags, stone, sand, etc. adhering or trapped on the underbody.
Clear off any such matter from the underbody. If the vehicle is used with these materi-
als trapped or adhering to the underb ody, a breakdown or fire could occur.
●When driving off-road or in rugged terrai n, do not drive at excessive speeds, jump,
make sharp turns, strike objects, etc. This may cause loss of control or vehicle rollover
causing death or serious injury. You are also risking expensive damage to your vehi-
cle’s suspension and chassis.

GX460_OM_OM60K80U_(U)
3734-6. Driving tips
4
Driving
NOTICE
■To prevent the water damage
Take all necessary safety measures to ensure that water damage to the engine or other
components does not occur.
●Water entering the engine air intake will cause severe engine damage.
●Water entering the automatic transmission will cause deterioration in shift quality,
locking up of your transmission accompan ied by vibration, and ultimately damage.
●Water can wash the grease from wheel be arings, causing rusting and premature fail-
ure, and may also enter the differentials, tr ansmission and transfer case, reducing the
gear oil’s lubricating qualities.
■When you drive through water
If driving through water, such as when crossing shallow streams, first check the depth of
the water and the bottom of the riverbed for firmness. Drive slowly and avoid deep
water.
■Inspection after off-road driving
●Sand and mud that has accumulated in brake drums and around brake discs may
affect braking efficiency and may damage brake system components.
●Always perform a maintenance inspection after each day of off-road driving that has
taken you through rough terr ain, sand, mud, or water. For scheduled maintenance
information, refer to the “Warranty and Services Guide”, “Owner’s Manual Supple-
ment” or “Scheduled Maintenance”.

414
GX460_OM_OM60K80U_(U)5-4. Using the other interior features
■Luggage compartment (120 V AC)
The power outlet can be used for 120 V AC accessories that run on less than
100 W.
■The power outlet can be used when
12 V DC: The engine switch is in
ACCESSORY or IGNITION ON mode.
120 V AC: The engine switch is in IGNITION ON mode.
■The protection circuit may be activated to cut the power supply if any of the following
conditions apply (120 V AC):
●Use of electrical appliances exceeding 100 W is attempted.
A sound may be heard when the protection circuit is activated. This is normal and does
not indicate a malfunction.
●The total power usage by all electrical features (headlights, air conditioning, etc.) has
exceeded the total vehicle maximum for an extended period of time.
■If the protection circuit is activated and th e power supply is cut, conduct the following
procedure (120 V AC):
Park the vehicle in a safe place, and then securely apply the parking brake.
Make sure that the power consumption of th e electric appliance is within the maxi-
mum capacity of the power outlet and the appliance is not broken.
Turn the engine switch to IGNITION ON mode again.
When the cabin temperature is high, open the windows to cool the temperature down.
Once it reaches the normal temperature, turn the engine switch to IGNITION ON
mode again.
If the power supply does not resume even after the above procedure has been per-
formed, have the vehicle inspected by your Lexus dealer.
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443
GX460_OM_OM60K80U_(U)6-2. Maintenance
6
Maintenance and care
General maintenance
Listed below are the general maintenance items that should be performed at
the intervals specified in the “Warranty and Service Guide” or “Owner’s
Manual Supplement”. It is recommende
d that any problem you notice should
be brought to the attention of your Lexu s dealer or qualified service shop for
advice.
Engine compartment
ItemsCheck points
BatteryCheck the connections. ( P. 4 6 0 )
Brake fluidIs the brake fluid at the correct level? ( P. 4 5 7 )
Engine coolantIs the engine coolant at the correct level? ( P. 4 5 5 )
Engine oilIs the engine oil at the correct level? ( P. 4 5 3 )
Exhaust systemThere should not be any fumes or strange sounds.
Power steering fluidIs the power steering fluid at the correct level?
( P. 4 5 9 )
Radiator/condenserThe radiator and condenser should be free from
foreign objects. ( P. 4 5 7 )
Wa s h e r f l u i dIs there sufficient washer fluid? ( P. 4 6 3 )

444
GX460_OM_OM60K80U_(U)6-2. Maintenance
Vehicle interior
ItemsCheck points
Accelerator pedal• The accelerator pedal should move smoothly
(without uneven pedal effort or catching).
Automatic transmission
“Park” mechanism• When parked on a slope and the shift lever is in P, isthe vehicle securely stopped?
Brake pedal
• Does the brake pedal move smoothly?
• Does the brake pedal have appropriate clearance
from the floor? ( P. 5 6 1 )
• Does the brake pedal have the correct amount of
free play? ( P. 5 6 1 )
Brakes
• The vehicle should not pull to one side when the
brakes are applied.
• The brakes should work effectively.
• The brake pedal should not feel spongy.
• The brake pedal should not get too close to the floor when the brakes are applied.
Head restraints• Do the head restraints move smoothly and lock
securely?
Indicators/buzzers• Do the indicators and buzzers function properly?
Lights• Do all the lights come on?
• Are the headlights aimed correctly? ( P. 484)
Parking brake• Does the parking brake pedal move smoothly?
• When parked on a slope and the parking brake is on,
is the vehicle securely stopped?
Seat belts•Do the seat belt s operate smoothly?
• The seat belts should not be damaged.
Seats• Do the seat controls operate properly?
Steering wheel
• Does the steering wheel rotate smoothly?
• Does the steering wheel have the correct amount of free play?
• There should not be an y strange sounds coming
from the steering wheel.

447
GX460_OM_OM60K80U_(U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Do-it-yourself service precautions
If you perform maintenance yourself, be sure to follow the correct procedures
as given in these sections.
ItemsPa r t s a n d t o o l s
Battery condition
(
 P. 4 6 0 )•Warm water• Baking soda•Grease
• Conventional wrench (for terminal clamp bolts)
Brake fluid level
( P. 4 5 7 )
• 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. 4 5 5 )
• “Toyota Super Long Life Coolant” or similar high quality eth-
ylene glycol based non-silicate, non-amine, non-nitrite and
non-borate coolant with long-life hybrid organic acid tech-
nology.
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 coolant)
Engine oil level
( P. 4 5 3 )
• “Toyota Genuine Motor Oil” or equivalent
•Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses
( P. 4 8 1 )• Fuse with same amperage rating as original

451
GX460_OM_OM60K80U_(U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Engine compartment
Power steering fluid reservoir
(P. 4 5 9 )
Engine oil level dipstick (P. 4 5 3 )
Engine oil filler cap ( P. 4 5 4 )
Brake fluid reservoir ( P. 4 5 7 )
Fuse box ( P. 4 8 1 ) Battery
( P. 4 6 0 )
Radiator ( P. 4 5 7 )
Condenser ( P. 4 5 7 )
Cooling fans
Engine coolant reservoir (P. 4 5 5 )
Wa s h e r f l u i d t a n k ( P. 4 6 3 )1
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GX460_OM_OM60K80U_(U)
4576-3. Do-it-yourself maintenance
6
Maintenance and care
Check the radiator and condenser and clear any foreign objects.
If either of the above parts is extremely dirty or you are not sure of their condi-
tion, have your vehicle checked by your Lexus dealer.
■Checking fluid level
The brake fluid level should be
between the “MAX” and “MIN” lines
on the tank.
■Adding fluid
Make sure to check the fluid type and prepare the necessary item.
Radiator and condenser
CAUTION
■When the engine is hot
Do not touch the radiator or condenser as they may be hot and cause serious injuries,
such as burns.
Brake fluid
Fluid typeFMVSS No.116 DOT 3 or SAE J1703 brake fluid
ItemsClean funnel

458
GX460_OM_OM60K80U_(U)6-3. Do-it-yourself maintenance
■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.
CAUTION
■When filling the reservoir
Take care because brake fluid can harm yo
ur hands or eyes and damage painted sur-
faces. If fluid gets on your eyes, flush the affected area with clean water immediately. If
you still experience discomfort, see a doctor.
NOTICE
■If the fluid level is low or high
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 refilling, it may
indicate a serious problem.