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

102
GX460_OM_OM60K80U_(U)3-2. Opening, closing and locking the doors and trunk
CAUTION
■Operating the back door
Observe the following precautions.
Failure to do so may cause parts of the body to be caught, resulting in death or serious
injury.
●When opening or closing the back door, thoroughly check to make sure the sur-
rounding area is safe.
●If anyone is in the vicinity, make sure they are safe and let them know that the back
door is about to open or close.
●Use caution when opening or closing the ba
ck door in windy weather as it may move
abruptly in strong wind.
●Do not pull on the back door damper stay to close the back door, and do not hang on
the back door damper stay.
Doing so may cause hands to be caught or the back door damper stay to break, caus-
ing an accident.
●If a bicycle carrier or similar heavy object is attached to the back door, it may sud-
denly shut again after being opened, causing someone’s hands, head or neck to be
caught and injured. When installing an accessory part to the back door, using a genu-
ine Lexus part is recommended.
●The back door may close if the back door
stopper is not locked (specifically, when using
the luggage compartment with the back door
kept open at your desired position). It is more
difficult to open or close the back door on an
incline than on a level surface, so beware of
the back door unexpectedly opening or clos-
ing by itself. Make sure that the back door
stopper is locked and secure before using the
luggage compartment.
●When closing the back door, take extra care
to prevent your fingers etc. from being
caught. Also pay attention to your personal
belongings such as bags and ties.
●When closing the back door, make sure to
press it lightly on its ou ter surface. If the back
door handle is used to fully close the back
door, it may result in hands or arms being
caught.

106
GX460_OM_OM60K80U_(U)3-2. Opening, closing and locking the doors and trunk
CAUTION
■Operating the glass hatch
Observe the following precautions.
Failure to do so may cause parts of the body to be caught, resulting in death or serious
injury.
●Remove any heavy loads, such as snow and ice, from the glass hatch before opening
it. Failure to do so may cause the glass hatc
h suddenly shut again after it is opened.
●When opening or closing the glass hatch, thoroughly check to make sure the sur-
rounding area is safe.
●If anyone is in the vicinity, make sure they are safe and let them know that the glass
hatch is about to open or close.
●Use caution when opening or closing the glass hatch in windy weather as it may move
abruptly in strong wind.
●Do not pull on the glass hatch damper stay to close the glass hatch, and do not hang
on the glass hatch damper stay.
Doing so may cause hands to be caught or the glass hatch damper stay to break,
causing an accident.
●Do not attach any accessories other than genuine Lexus parts to the glass hatch.
Such additional weight on the glass hatch may cause the glass hatch to suddenly shut
again after it is opened, result ing in death or serious injury.
●The glass hatch may close if it is not opened
fully. It is more difficult to open or close the
glass hatch on an incline than on a level sur-
face, so beware of the glass hatch unexpect-
edly opening or closing by itself. Make sure
that the glass hatch is fully open and secure
before using the luggage compartment. Also
pay attention to your personal belongings
such as bags and ties.
●When closing the glass hatch, take extra care
to prevent your fingers etc. from being
caught. Also pay attention to your personal
belongings such as bags and ties.
●When closing the glass hatch, make sure to
press it lightly on its outer surface.

GX460_OM_OM60K80U_(U)
1273-3. Adjusting the seats
3
Operation of each component
CAUTION
■When folding the seatbacks down
Observe the following precautions. Failure to do so may result in death or serious
injury.
●Do not fold the seatbacks down while driving.
●Stop the vehicle on level ground, set the parking brake and shift the shift lever to P.
●Do not allow anyone to sit on a folded seatback or in the luggage compartment while
driving.
●Do not allow children to enter the luggage compartment.
■Seat adjustment
Observe the following precautions. Failure to do so may result in death or serious
injury.
●To reduce the risk of sliding under the lap belt during a collision, do not recline the
seat more than necessary.
If the seat is too reclined, the lap belt may slide past the hips and apply restraint forces
directly to the abdomen, or your neck may contact the shoulder belt, increasing the
risk of death or serious injury in the event of an accident.
Adjustments should not be made while dr iving as the seat may unexpectedly move
and cause the driver to lose control of the vehicle.
●Be careful not to get hands or feet pinc hed between the rear console box and the
second seat when folding down the rear seatback.
■When stowing the third seats
Observe the following precautions. Failure to do so may result in death or serious
injury.
●Check that there is no luggage and that there are no other people around the seat
before stowing operation.
●Do not insert hands or feet into the moving parts of the seat.
●Do not allow children to operate the seat.
■After returning the seatbacks to the upright position
Observe the following precautions. Failure to do so may result in death or serious
injury.
●Make sure the seatback is securely locked by pushing it forward and rearward on the
top.
●Check that the seat belts are not twisted or caught in the seatback.
NOTICE
■When returning the third seat (vehicles with a luggage cover)
If the luggage cover is installed in the luggage compartment, make sure you remove it
before returning the third seat. ( P. 404) The luggage cover may be damaged by the
seat.

154
GX460_OM_OM60K80U_(U)4-1. Before driving
CAUTION
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When the vehicle is stopped
●Do not race the engine.
If the vehicle is in any gear other than P or N, the vehicle may accelerate suddenly
and unexpectedly, causing an accident.
●In order to prevent accidents due to the vehicle rolling away, always keep depressing
the brake pedal while the engine is running, and apply the parking brake as neces-
sary.
●If the vehicle is stopped on an incline, in order to prevent accidents caused by the
vehicle rolling forward or backward, always depress the brake pedal and securely
apply the parking brake as needed.
●Avoid revving or racing the engine. Running the engine at high speed while the vehi-
cle is stopped may cause the exhaust system to overheat, which could result in a fire if
combustible material is nearby.
■When the vehicle is parked
●Do not leave glasses, cigarette lighters, sp
ray cans, or soft drink cans in the vehicle
when it is in the sun.
Doing so may result in the following:
• Gas may leak from a cigarette lighter or spray can, and may lead to a fire.
• The temperature inside the vehicle may cause the plastic lenses and plastic mate- rial of glasses to deform or crack.
• Soft drink cans may fracture, causing the contents to spray over the interior of the
vehicle, and may also cause a short circuit in the vehicle’s electrical components.
●Do not leave cigarette lighters in the vehicle. If a cigarette lighter is in a place such as
the glove box or on the floor, it may be lit accidentally when luggage is loaded or the
seat is adjusted, causing a fire.
●Do not attach adhesive discs to the windsh ield or windows. Do not place containers
such as air fresheners on the instrument panel or dashboard. Adhesive discs or con-
tainers may act as lenses, causing a fire in the vehicle.
●Do not leave a door or window open if the curved glass is coated with a metallized
film such as a silver-colored one. Reflected sunlight may cause the glass to act as a
lens, causing a fire.
●Always apply the parking brake, shift the shift lever to P, stop the engine and lock the
vehicle.
Do not leave the vehicle unattend ed while the engine is running.
●Do not touch the exhaust pipes while the engine is running or immediately after turn-
ing the engine off.
Doing so may cause burns.

GX460_OM_OM60K80U_(U)
1554-1. Before driving
4
Driving
CAUTION
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When taking a nap in the vehicle
Always turn the engine off. Otherwise, if you accidentally move the shift lever or
depress the accelerator pedal, this could cause an accident or fire due to engine over-
heating. Additionally, if the vehicle is parked in a poorly ventilated area, exhaust gases
may collect and enter the vehicle, leadin g to death or a serious health hazard.
■When braking
●When the brakes are wet, drive more cautiously.
Braking distance increases when the brakes are wet, and this may cause one side of
the vehicle to brake differently than the other side. Also, the parking brake may not
securely hold the vehicle.
●If the power brake assist function does not operate, do not follow other vehicles
closely and avoid hills or sharp turns that re quire braking. In this case, braking is still
possible, but the brake pedal should be depressed more firmly than usual. Also, the
braking distance will increase. Have your brakes fixed immediately.
●Do not pump the brake pedal if the engine stalls.
Each push on the brake pedal uses up the reserve for the power-assisted brakes.
●The brake system consists of 2 individual hydraulic systems: If one of the systems fails,
the other will still operate. In this case, the brake pedal should be depressed more
firmly than usual and the bra king distance will increase.
Have your brakes fixed immediately.
■If the vehicle becomes stuck
Do not spin the wheels excessively when any of the tires is up in the air, or the vehicle is
stuck in sand, mud, etc. This may damage th e driveline components or propel the vehi-
cle forward or backward, causing an accident.

GX460_OM_OM60K80U_(U)
1594-1. Before driving
4
Driving
CAUTION
■Things that must not be carried in the luggage compartment
The following things may cause a fire if loaded in the luggage compartment:
●Receptacles containing gasoline
●Aerosol cans
■Storage precautions
Observe the following precautions.
Failure to do so may prevent the pedals from being depressed properly, may block the
driver’s vision, or may result in items hittin g the driver or passengers, possibly causing
an accident.
●Stow cargo and luggage in the luggage compartment whenever possible.
●Do not stack cargo and luggage in the luggage compartment higher than the seat-
backs.
●Do not place cargo or luggage in or on the following locations.
• At the feet of the driver
• On the front passenger or rear seats (when stacking items)
• On the luggage cover (if equipped)
• On the instrument panel
•On the dashboard
●Secure all items in th e occupant compartment.
●When you fold down the rear seats, long items should not be placed directly behind
the front seats.
●Never allow anyone to ride in the luggage compartment. It is not designed for pas-
sengers. They should ride in their seats wi th their seat belts properly fastened. Other-
wise, they are much more likely to suffer de ath or serious bodily injury, in the event of
sudden braking, sudden swerving or an accident.

160
GX460_OM_OM60K80U_(U)4-1. Before driving
CAUTION
■Capacity and distribution
●Do not exceed the maximum axle weight ra
ting or the total vehicle weight rating.
●Even if the total load of occupant’s weight and the cargo load is less than the total load
capacity, do not apply the load unevenly. Improper loading may cause deterioration
of steering or braking control which may cause death or serious injury.
■Roof luggage carrier precautions (if equipped)
To use the roof rails as a roof luggage carrier, you must fit the roof rails with two or more
genuine Lexus cross rails or their equivalent.
Follow the manufacturer’s instructions and pr ecautions when installing the cross rails or
their equivalent.
When you load cargo on the roof lu ggage carrier, observe the following:
●Place the cargo so that its weight is distributed evenly between the front and rear
axles.
●If loading long or wide cargo, never exce ed the vehicle overall length or width.
(  P. 5 5 4 )
●Before driving, make sure the cargo is securely fastened on the roof luggage carrier.
●Loading cargo on the roof luggage carrier will make the center of gravity of the vehi-
cle higher. Avoid high speeds, sudden starts, sharp turns, sudden braking or abrupt
maneuvers, otherwise it may result in loss of control or vehicle rollover due to failure
to operate this vehicle correctly and result in death or serious injury.
●If driving for a long distance, on rough roads, or at high speeds, stop the vehicle now
and then during the trip to make sure the cargo remains in its place.
●Do not exceed 176 lb. (80 kg) cargo weight on the roof luggage carrier.
NOTICE
■When loading cargo on the roof luggage carrier (if equipped)
Be careful not to scratch the surface of the moon roof.

GX460_OM_OM60K80U_(U)
1754-1. Before driving
4
Driving
■Matching trailer ball height to trailer coupler height
■Before towing
Check that the following conditions are met:
●Ensure that your vehicle’s tires are properly inflated. ( P. 5 6 2 )
●Trailer tires are inflated according to the trailer manufacturer’s recommendation.
●All trailer lights work as required by law.
●All lights work each time you connect them.
●The trailer ball is set at the proper height for the coupler on the trailer.
●The trailer is level when it is hitched.
Do not drive if the trailer is not level, and check for improper to ngue weight, overload-
ing, worn suspension, or other possible causes.
●The trailer cargo is securely loaded.
●The rear view mirrors conform to all applicable federal, state/provincial or local regula-
tions. If they do not, install rear view mirrors appropriate for towing purposes.
No matter which class of tow hitch applies, for a
more safe trailer hookup, the trailer ball setup
must be the proper height for the coupler on the
trailer.
Trailer ball
Coupler
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GX460_OM_OM60K80U_(U)
1794-1. Before driving
4
Driving
CAUTION
■Hitch
Trailer hitch assemblies have different weight capacities established by the hitch manu-
facturer. Even though the vehicle may be physically capable of towing a higher weight,
the operator must determine the maximum weig ht rating of the particular hitch assem-
bly and never exceed the maximum weight rating specified for the trailer-hitch.
Exceeding the maximum weight rating set by the trailer-hitch manufacturer can cause
an accident resulting in death or serious personal injuries.
■When towing a trailer
Lexus recommends trailers with brakes that conform to any applicable federal and
state/provincial regulations.
●If the gross trailer weight exceeds unbraked TWR, trailer brakes are required. Lexus
recommends trailers with brakes that conform to all applicable federal and state/pro-
vincial regulations.
●Never tap into your vehicle’s hydraulic system, as this will lower the vehicle’s braking
effectiveness.
●Never tow a trailer without using a safety ch ain securely attached to both the trailer
and the vehicle. If damage occurs to the coupling unit or hitch ball, there is danger of
the trailer wandering into another lane.
NOTICE
■When installing a trailer hitch
Use only the position recommended by your Lexus dealer. Do not install the trailer
hitch on the bumper; this may cause body damage.
■Do not directly splice trailer lights
Do not directly splice trailer lights. Dire ctly splicing trailer lights may damage your
vehicle’s electrical system and cause a malfunction.

200
GX460_OM_OM60K80U_(U)4-3. Operating the lights and wipers
Fog light switch
Ty p e A
Turns the fog lights off
Turns the fog lights on
: If equipped
The fog lights secure excellent visibility in difficult driving conditions, such as
in rain and fog.
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