warning LEXUS RX450h 2018 Repair Manual

1533-2. Opening, closing and locking the doors
3
Operation of each component
RX450h_RX450hL _U_OM48F85UWARNING ■
Operating the power back door
Observe the following precautions.
Failure to do so may cause parts of the body to be caught, resultin g in death or serious
injury. ●
Remove any heavy loads, such as snow an d ice, from the power back door before
opening it. Failure to do so may cause the power back door to suddenly shut again
after it is opened. ●
When opening or closing the power back d oor, thoroughly check to make sure the
surrounding area is safe. ●
If anyone is in the vicinity, make sure they are safe and let them know that the power
back door is about to open or close. ●
Use caution when opening or closing the power back door in windy weather as it may
move abruptly in strong wind.
●
Do not pull on the back door spindle ( → P. 156) to close the power back door, and
do not hang on the back door spindle.
Doing so may cause hands to be caught or the back door spindle to break, causing
an accident. ●
If a bicycle carrier or similar heavy object is attached to the power back door, it may
suddenly shut again after being opened, causing someone’s hands, arms, head or
neck to be caught and injured. When inst alling an accessory part to the power back
door, using a genuine Lexus part is recommended. ●
The power back door may suddenly shut if it is
not opened fully, while on a steep incline.
Make sure that the power back door is secure
before using the luggage compartment. ●
When closing the power back door, take
extra care to prevent your fingers, etc., from
being caught. ●
When closing the power back door, make
sure to press it lightly on its outer surface. If
the back door handle is used to fully close the
power back door, it may result in hands or
arms being caught.

154 3-2. Opening, closing and locking the doors
RX450h_RX450hL _U_OM48F85UWARNING ■
Back door closer
●
Use caution when using the back door closer as it still operates when the power back
door system is disabled. ■
Power back door
Observe the following precautions wh en operating the power back door.
Failure to do so may cause death or serious injury. ●
Check the safety of the surrounding area to make sure there are no obstacles or any-
thing that could cause any of yo ur belongings to get caught.●
If anyone is in the vicinity, make sure they are safe and let them know that the power
back door is about to open or close. ●
If the power back door system is disabled ( → P. 112) while the power back door is
operating, the power back door will stop operating. The power back door must then
be operated manually. Take extra care in th is situation, as the power back door may
open or close suddenly. ●
If the operating conditions of the power back door ( → P. 147) are no longer met, a
buzzer may sound and the power back door may stop opening or closing. The power
back door must then be operated manually. Ta ke extra care on an incline in this situa-
tion, as the power back door may move suddenly. ●
On an incline, the power back door may su ddenly shut after it opens. Make sure the
power back door is fully open and secure. ●
In the following situations, the power back door may detect an abnormality and auto-
matic operation may be stopped. In this case, the power back door must then be
operated manually. Take extra care in this situation, as the stopped power back door
may suddenly open or close, causing an accident.
• When the power back door contacts an obstacle
• When the 12-volt battery voltage suddenly drops, such as when the power switch
is turned to ON mode or the hybrid syst em is started during automatic operation●
In the event that the power back door is left
slightly open, the back door closer will auto-
matically close it to the fully closed position. It
takes several seconds before the back door
closer begins to operate. Be careful not to get
fingers caught or anything else in the power
back door, as this may cause bone fractures
or other serious injuries.

1553-2. Opening, closing and locking the doors
3
Operation of each component
RX450h_RX450hL _U_OM48F85UWARNING ●
If a bicycle carrier or similar heavy object is attached to the power back door, the
power back door may not operate, causin g a malfunction, or the power back door
may suddenly shut again after being open ed, causing someone’s hands, arms, head
or neck to be caught and injured. When installing an accessory part to the power
back door, using a genuine Lexus part is recommended. ■
Jam protection function
Observe the following precautions.
Failure to do so may cause death or serious injury. ●
Never use any part of your body to intentionally activate the jam protection function. ●
The jam protection function may not work if something gets caught just before the
power back door fully closes. Be careful no t to get fingers caught or anything else.●
The jam protection function may not work depending on the shape of the object that
is caught. Be careful not to catch fingers or anything else.

1593-2. Opening, closing and locking the doors
3
Operation of each component
RX450h_RX450hL _U_OM48F85U■
Alarms and warning messages
A combination of exterior and interior alar ms as well as warning messages shown on the
multi-information display are used to prevent theft of the vehicle and accidents resulting
from erroneous operation. Take appropriate measures in response to any warning mes-
sage on the multi-information display. ( → P. 667)
When only an alarm sounds, circumstances and correction procedures are as follows.
■
If a warning message is displayed indicating that there is a malfunction in the smart
access system with push-button start
→ P. 667 ■
Battery-saving function
The battery-saving function w ill be activated in order to pr event the electronic key bat-
tery and the 12-volt battery from being discha rged while the vehicle is not in operation
for a long time. ●
In the following situations, the smart acce ss system with push-button start may take
some time to unlock the doors.
• The electronic key has been le ft in an area of approximatel y 6 ft. (2 m) of the outside
of the vehicle for 10 minutes or longer.
• The smart access system with push-button st art has not been used for 5 days or lon-
ger. ●
If the smart access system with push-button start has not been used for 14 days or lon-
ger, the doors cannot be unlocked at any doors except the driver’s door. In this case,
take hold of the driver’s d oor handle, or use the wireless remote control or the mechan-
ical key, to unlock the doors. Alarm Situation Correction procedure
Exterior alarm
sounds once for 5
seconds An attempt was made to lock
the vehicle while a door was
open. Close all of the doors and
lock the doors again.
Interior alarm pings
repeatedly The power switch was turned to
ACCESSORY mode while the
driver’s door was open (The
driver’s door was opened when
the power switch was in
ACCESSORY mode). Turn the power switch off
and close the driver’s door.

166 3-2. Opening, closing and locking the doors
RX450h_RX450hL _U_OM48F85UWARNING ■
Caution regarding interference with electronic devices●
People with implantable cardiac pacema kers, cardiac resynchronization therapy-
pacemakers or implantable cardioverter de fibrillators should keep away from the
smart access system with push-button start antennas. ( → P. 158)
The radio waves may affect the operation of such devices. If necessary, the entry
function can be disabled. Ask your Lexus dealer for details, such as the frequency of
radio waves and timing of the emitted radio waves. Then, consult your doctor to see if
you should disable the entry function. ●
Users of any electrical medical device ot her than implantable cardiac pacemakers,
cardiac resynchronization th erapy-pacemakers or implantable cardioverter defibril-
lators should consult the manufacturer of the device for information about its opera-
tion under the influence of radio waves.
Radio waves could have unexpected effects on the operation of such medical
devices.
Ask your Lexus dealer for details on disabling the entry function.

167
3
Operation of each component
RX450h_RX450hL _U_OM48F85U 3-3. Adjusting the seats
Seat position adjustment switch
Seat cushion (front) angle adjust-
ment switch
Vertical height adjustment switch
Seatback angle adjustment switch
Lumbar support firmness adjust-
ment switch
Lumbar support height adjustment
switch (if equipped)
Seat cushion length adjustment
switch (if equipped) ■
Power easy access system
The driver’s seat (on some models) and stee ring wheel move in accordance with power
switch mode and the driver’s seat belt condition. ( → P. 181)Front seats Adjustment procedure 1
2
3
4
5
6
7
WARNING ■
When adjusting the seat position ●
Take care when adjusting the seat position to ensure that other passengers are not
injured by the moving seat. ●
Do not put your hands under the seat or near the moving parts to avoid injury.
Fingers or hands may become jammed in the se at mechanism.●
Make sure to leave enough space around the feet so they do not get stuck. ■
Seat adjustment
To reduce the risk of sliding under the lap be lt 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 shou lder belt, increasing the risk
of death or serious injury in the event of an accident.
Adjustments should not be made while drivin g as the seat may unexpectedly move and
cause the driver to lose control of the vehicle.

1793-3. Adjusting the seats
3
Operation of each component
RX450h_RX450hL _U_OM48F85UWARNING ■
When a rear seatback is folded
Observe the following precautions.
Failure to do so may result in death or serious injury.●
Do not fold down the rear seatbacks while driving. ●
Stop the vehicle on level grou nd, apply the parking brake and shift the shift lever to P.●
Do not allow anyone to sit on a folded re ar seatback or in th e luggage compartment
while driving. ●
Do not allow children to enter the luggage compartment. ■
When operating the rear seatback
Observe the following precautions.
Failure to do so may result in death or serious injury.●
Make sure that passengers are clear of the rear seatback before operating it.●
To prevent hands and other body parts from being caught, keep them away from the
gaps in the seats and the moving parts of the seats when operating a rear seatback.●
Power seat: Do not let children operate th e rear seatback. Othe r passengers may get
caught in the seat. ●
Power seat: Make sure that a ll passengers are clear of a seat before folding it. Do not
let passengers sit in the seat while it is being folded.■
Seat adjustment ●
Second-row seats: To reduce the risk of s liding under the lap belt during a collision,
do not recline the seat more than necessary.
If the seat is reclined excessively, the la p 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 de ath 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. ■
After adjusting the rear seats
Observe the following precautions.
Failure to do so may result in death or serious injury.●
Manual seats: Make sure that the rear se atback is securely locked in position by
lightly pushing it back and forth. ●
Check that the seat belts are not twisted or caught between or behind in the rear
seatback.

180 3-3. Adjusting the seats
RX450h_RX450hL _U_OM48F85UWARNING ■
Jam protection function (power seats)
Observe the following precautions.
Failure to do so may result in death or serious injury.●
Never use any part of your body to intentionally activate the jam protection function. ●
The jam protection function may not operate if something is caug ht just before the
fully folded position. Be careful so th at fingers, etc. do not get caught.●
The jam protection function may not operat e depending on the shape or position of
the obstruction. Be careful so that fingers, etc. do not get caught.■
Precautions for third-row seat (RX450hL)
When operating a third-row seat, make sure to press and hold the sw itch until the third-
row seat seatback is complete ly folded/upright. Do not use a third-row seat in a posi-
tion other than the completely upright position, as doing so may lead to death or seri-
ous injury in an accident. (If the switch is released while the seatback is still moving, a
buzzer will sound continuously until the seatback is complete ly folded/upright.)
NOTICE ■
Before folding a rear seat seatback ●
Second-row seats: Make sure to stow the center seat seat belt buckle and armrest
before folding the second-row seat seatbacks. ( → P. 558)●
Third-row seats: Make sure th at the third-row seats and trays are free of obstructions
before folding the seatbacks. Otherwise the seat or tray may be damaged. ■
When moving the second-row seat for third-row seat access (RX450hL)
Do not slide the second-row se at forward if an electronic device is connected to the
power outlet on the rear console. Otherwise, the second-row seat may contact the
electronic device, possibly resu lting in damage to the device.■
Before returning the third-row seat seatbacks to the upright position (RX450hL)
If the luggage cover is insta lled in the luggage compartmen t, make sure to remove it
before returning the third-row seat seatbacks. ( → P. 541) Otherwise, the luggage
cover may be damaged.

1853-3. Adjusting the seats
3
Operation of each component
RX450h_RX450hL _U_OM48F85U■
Cancelation procedure
Carry only the key you want to cance l and then close the driver’s door.
If 2 or more keys are in the vehicle, the driving position cannot be canceled
properly.
Turn the power switch to ON mode.
While pressing the “SET” button, pr ess and hold the door lock switch
(either lock or unlock) un til the buzzer sounds twice.If it button could not be canceled, the buzzer sounds continuously for approxi-
mately 3 seconds.■
Recalling the driving position using the memory recall function●
Different driving positions can be registered for each electronic key. Therefore, the
driving position that is recalled may be di fferent depending on the key being carried.●
If a door other than the driver’s door is unlocked with the smart access system with
push-button start, the driving position cannot be recalled. In this case, press the driving
position button which has been set. ■
Customization
Some functions can be customized. ( → P. 736)
WARNING ■
Seat adjustment caution
Take care during seat adjustment so that th e seat does not strike the rear passenger or
squeeze your body against the steering wheel. 1
2

188 3-3. Adjusting the seats
RX450h_RX450hL _U_OM48F85U■
Installing the head restraints 
Front and second-row seats 
Third-row seats
■
Adjusting the height of the head restraints
■
Adjusting the second-row center an d third-row seat head restraints
Always raise the head restraint one leve l from the stowed position when using.Align the head restrain t with the installation
holes and push it down to the lock position.
Press and hold the lock release button when
lowering the head restraint.
Align the head restrain t with the installation
holes and push it down to the lock position.
Press and hold the lock release button when
lowering the head restraint.
Make sure that the head restraints are adjusted
so that the center of the head restraint is closest
to the top of your ears.
WARNING ■
Head restraint precautions
Observe the following precautions regarding the head restraints.
Failure to do so may result in death or serious injury.●
Use the head restraints design ed for each respective seat.●
Adjust the head restraints to th e correct position at all times.●
After adjusting the head restraints, push down on them and make sure they are
locked in position. ●
Do not drive with the head restraints removed. Lock release button
Lock release
button