battery LEXUS RX450h 2018 Workshop Manual

5256-2. Using the air conditioning system and defogger
RX450h_RX450hL _U_OM48F85U 6
Interior features
Heated steering wheel ∗
/seat heaters ∗
/seat ventila-
tors ∗
∗ : If equippedHeated steering wheel and seat heaters heat the side grips of the steering
wheel and seats, respectively. Seat ventilators maintain good airflow by blow-
ing air from the seats. WARNING ●
Care should be taken to prevent injury if anyone in the following categories comes in
contact with the steering wheel and seats when the heater is on:
• Babies, small children, the elderly, the sick and the ph ysically challenged
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sleeping drugs, cold
remedies, etc.) ●
Observe the following precautions to prevent minor burns or overheating:
• Do not cover the seat with a blanket or cushion when using the seat heater.
• Do not use seat heater more than necessary.
NOTICE ●
Do not put heavy objects that have an unev en surface on the seat and do not stick
sharp objects (needles, nails, etc.) into the seat. ●
To prevent 12-volt battery discharge, do not use the functions when the hybrid system
is off.

5316-3. Using the interior lights
6
Interior features
RX450h_RX450hL _U_OM48F85U●
Illuminated entry system: The lights automatically turn on/off according to power switch
mode, the presence of the electronic key, whether the doors are locked/unlocked, and
whether the doors are opened/closed. ●
If the interior lights remain on when the power switch is turned off, the lights will go off
automatically after 20 minutes. ●
In the following cases, the interior lights and front personal lights may not respond as
normal.
• When water, dirt, etc., have adhered to the lens surface
• When operated with a wet hand
• When wearing gloves, etc. ●
Some functions can be customized ( → P. 736)
NOTICE ●
Never remove the lens for the front interior light and fron t personal lights. Otherwise,
the lights will be damaged. If the lens need to remove, contact your Lexus dealer.●
To prevent 12-volt battery discharge, do not leave the lights on longer than necessary
when the hybrid system is off.

547
RX450h_RX450hL _U_OM48F85U 6
Interior features 6-5. Using the other interior features
To set the visor in the forward posi-
tion, flip it down.
To set the visor in the side position,
flip down, unhook, and swing it to the
side.
To use the side extender, place the
visor in the side position, then slide it
backward.
Slide the cover to open. The light turns on when the cover is
opened.
If the vanity lights remain on when the power sw itch is turned off, the light will go off auto-
matically after 20 minutes.Other interior features Sun visors 1
2
3
Vanity mirrors
NOTICE
To prevent 12-volt battery discharge, do not leave the vanity lights on for extended peri-
ods while the hybrid system is off.

548 6-5. Using the other interior features
RX450h_RX450hL _U_OM48F85U 
Vehicles with a Lexus Display Audio system
The clock can be adjusted by pressing
the buttons.
Pressing and holding will move the
clock hands backward.
Pressing and holding will move the
clock hands forward. 
Vehicles with a navigation system
The GPS clock's time is automatically
adjusted by utilizing GPS time informa-
tion. For details, refer to “NAVIGATION
SYSTEM OWNER’S MANUAL”.
A portable device, such as a smartphone or mobile battery, can be charged by
just placing it on the charging area, prov ided the device is compatible with the Qi
wireless charging standard created by the Wireless Power Consortium.
The wireless charger cannot be used with a portable device that is larger than
the charging area. Additionally, dependin g on the portable device, the wireless
charger may not operate properly. Refer to the operation manual of the portable
device. ■
The “Qi” symbol
The “Qi” symbol is a trademark of the Wireless Power Consortium.Clock 1
2
Wireless charger (if equipped)

554 6-5. Using the other interior features
RX450h_RX450hL _U_OM48F85UNOTICE ■
Conditions in which the wireless charger may not operate correctly
In the following situations, the wire less charger may not operate correctly:●
When a portable device is fully charged ●
When there is a foreign object between the charging area and portable device●
When a portable device becomes hot while charging●
When a portable device is placed on the wireless area with its charging surface fac-
ing up ●
When a portable device is not centered on the charging area ●
When the vehicle is near a TV tower, electric power plant, gas station, radio station,
large display, airport or other facility that generates stro ng radio waves or electrical
noise ●
When the portable device is in contact with, or is covered by any of the following
metallic objects:
• Cards to which aluminum foil is attached
• Cigarette boxes that ha ve aluminum foil inside
• Metallic wallets or bags
•Coins
•Metal hand warmers
• Media such as CDs and DVDs ●
When wireless keys (that emit radio waves) other than those of your vehicle are being
used nearby.
If in situations other than above the wirele ss charger does not operate properly or the
operation indicator light is blinking, the wireless charge r may be malfunctioning. Con-
tact your Lexus dealer. ■
To prevent failure or damage to data ●
Do not bring magnetic cards, such as a cr edit card, or magnetic recording media,
close to the wireless charger while charging. Otherwise, data may be erased due to
the influence of magnetism.
Additionally, do not bring pr ecision instruments such as wrist watches, close to the
wireless charger, as such objects may malfunction. ●
Do not leave portable devices in the cab in. The temperature inside the cabin may
become high when parked in the sun, and cause damage to the device. ■
To prevent 12-volt battery discharge
Do not use the wireless charger for a long pe riod of time with the hybrid system is
stopped.

556 6-5. Using the other interior features
RX450h_RX450hL _U_OM48F85U●
The power outlets can be used when the power switch is in ACCESSORY or ON
mode. 
In the luggage compartment
(RX450hL)
Open the lid. ●
The shape of the console box rim allows power
cables to be passed through when the console
box lid is closed.
NOTICE ●
To avoid damaging the power outlets, insta ll the cap or close the lid when the power
outlets is not in use.
Foreign objects or liquids that enter the power outlets may cause a short circuit. ●
To prevent 12-volt battery discharge, do not use the power outlets longer than neces-
sary when the hybrid system is off.

5656-5. Using the other interior features
6
Interior features
RX450h_RX450hL _U_OM48F85UPress and hold the 2 outside buttons for
10 seconds until the HomeLink ®

indi-
cator light changes from continuously
lit (orange) to rapidly flashing (green). If you sell your vehicle, be sure to erase
the programs stored in the HomeLink ®
memory. ■
Codes stored in the HomeLink ®
memory●
The registered codes are not erased even if the battery cabl e is disconnected.●
If learning failed when registerin g a different code to a HomeLink ®
button that already
has a code registered to it, the alread y registered code will not be erased.■
Before programming ●
Install a new battery in the transmitter. ●
The battery side of the transmitter must be pointed away from the HomeLink ®
.■
Certification for the garage door opener 
For vehicles sold in the U.S.A.Erasing the entire HomeLink ®
memory (all three codes)

5696-5. Using the other interior features
6
Interior features
RX450h_RX450hL _U_OM48F85U■
Circling calibration
Stop the vehicle in a place where it is safe to drive in a circle.
Press and hold the button for 9
seconds. “C” appears on the compass display.
Drive the vehicle at 5 mph (8 km/h)
or less in a circle until a direction is
displayed. If there is not enough space to drive
in a circle, drive around the block
until a direction is displayed.■
Conditions unfavorable to correct operation
The compass may not show the correct di rection in the follo wing conditions:●
The vehicle is stopped immediately after turning. ●
The vehicle is on an inclined surface. ●
The vehicle is in a place where the earth’s magnetic field is subject to interference by
artificial magnetic fields (underground car park/parking lot, under a steel tower,
between buildings, roof car park/parking lot, near an intersection, near a large vehicle,
etc.). ●
The vehicle has become magnetized.
(There is a magnet or metal object near the inside rear view mirror.)●
The battery has been disconnected. ●
A door is open. 1
2
3

579
7Maintenance and care
RX450h_RX450hL _U_OM48F85U7-1. Maintenance and care
Cleaning and protecting
the vehicle exterior................ 580
Cleaning and protecting
the vehicle interior ................. 584
7-2. Maintenance
Maintenance
requirements.............................587
General maintenance ............. 589
Emission inspection and
maintenance (I/M)
programs ....................................592 7-3. Do-it-yourself
maintenance
Do-it-yourself service
precautions................................593
Hood ...............................................595
Positioning a floor jack ............ 596
Engine compartment ............... 597
12-volt battery .............................605
Tires .................................................... 611
Tire inflation pressure............... 620
Wheels ........................................... 623
Air conditioning filter ............... 625
Windshield wiper inserts ........ 628
Electronic key battery ..............630
Checking and replacing
fuses .............................................. 632
Headlight aim .............................. 635
Light bulbs..................................... 637

5817-1. Maintenance and care
7
Maintenance and care
RX450h_RX450hL _U_OM48F85U■
Note for a smart access system with push-button start ●
If the door handle becomes wet while the el ectronic key is within the effective range,
the door may lock and unlock repeatedly. Place the key in a position 6 ft. (2 m) or more
separate from the vehicle while the vehicle is being washed. (Take care to ensure that
the key is not stolen.) ●
If the electronic key is inside the vehicle and a door handle becomes wet during a car
wash, a buzzer will sound outside the vehicle. To turn off the alarm, lock all the doors.●
Set the electronic key to battery-saving mo de to disable the sm art access system with
push-button start. ( → P. 159)■
Aluminum wheels ●
Remove any dirt immediately by using a neutral detergent. ●
Wash detergent off with water immediately after use. ●
To protect the paint from damage, make sure to observe the following precautions.
• Do not use acidic, alkaline or abrasive detergent
• Do not use hard brushes
• Do not use detergent on the wheels when they are hot, such as after driving or park-
ing in hot weather■
Bumpers
Do not scrub with abrasive cleaners. ■
Front side windows water-repellent coating ●
The following precautions can extend the effectiveness of the water-repellent coating.
• Remove any dirt, etc. from the front side windows regularly.
• Do not allow dirt and dust to accumulate on the windows for a long period.
Clean the windows with a soft, damp cloth as soon as possible.
• Do not use wax or glass cleaners that co ntain abrasives when cleaning the windows.
• Do not use any metallic objects to remove condensation build up.●
When the water-repellent performance has become insufficient, the coating can be
repaired. Contact your Lexus dealer.