2018 LEXUS RX450h battery

748 9-2. Customization
RX450h_RX450hL _U_OM48F85U■
Seat belt reminder ( → P. 662)■
Vehicle customization ●
When the smart access system with push-button start is off, the entry unlock function
cannot be customized. ●
When the doors remain closed after unlocking the doors and the timer activated auto-
matic door lock function activates, signals will be generated in accordance with the
operation buzzer volume and operational si gnal (Emergency flashers) function set-
tings. ●
Some settings can be changed using a switch or the audio system screen. If a setting is
changed using a switch , the changed setting will not be reflected on the audio system
screen until the power switch is turned off and then to ON mode.Function Default setting Customized setting
Vehicle speed linked seat belt
reminder buzzer On Off — O
WARNING ■
Cautions during customization
As the hybrid system needs to be operating during customization, ensure that the vehi-
cle is parked in a place with adequate ventil ation. In a closed area such as a garage,
exhaust gases including harmful carbon mo noxide (CO) may collect and enter the
vehicle. This may lead to death or a serious health hazard.
NOTICE ■
During customization
To prevent 12-volt battery discharge, ensure that the hybrid syst em is operating while
customizing features. 1 2

749
RX450h_RX450hL _U_OM48F85U 9
Vehicle specifications 9-3. Initialization
Items to initialize The following items must be initialized for normal system operation after such
cases as the 12-volt battery being re connected, or maintenance being per-
formed on the vehicle. Item When to initialize Reference
Message indicating mainte-
nance is required (U.S.A. only) • After the maintenance is per-
formed P. 588
Tire pressure warning system • When changing the tire inflation
pressure by changing traveling
speed
• When changing the tire size
• When rotating the tires P. 613
Oil maintenance • After the maintenance is per-
formed P. 600
Intelligent Clearance Sonar
(ICS) • After reconnecting or changing
the 12-volt battery P. 353
Power back door • After reconnecting or changing
the 12-volt battery P. 150

766
RX450h_RX450hL _U_OM48F85UWhat to do if... (Troubleshooting)
What to do if... (Troubleshooting) ●
If you lose your mechanical keys, ne w genuine mechanical keys can be made
by your Lexus dealer. ( → P. 133)●
If you lose your electronic keys, the risk of vehicle theft increases significantly.
Contact your Lexus dealer immediately. ( → P. 135)●
Is the electronic key battery weak or depleted? ( → P. 630)●
Is the power switch in ON mode?
When locking the doors, turn the power switch off. ( → P. 240)●
Is the electronic key left inside the vehicle?
When locking the doors, make sure that you have the electronic key on your
person. ●
The function may not operate properly du e to the condition of the radio wave.
( → P. 160)
●
Is the child-protector lock set?
The rear door cannot be opened from in side the vehicle when the lock is set.
Open the rear door from outside and then unlock the child-protector lock.
( → P. 139)If you have a problem, check the foll owing before contacting your Lexus
dealer.
The doors cannot be locked, unlocked, opened or closed You lose your keys
The doors cannot be locked or unlocked
The rear door cannot be opened

767What to do if... (Troubleshooting)
RX450h_RX450hL _U_OM48F85U●
Did you press the power switch while firmly depressing the brake pedal?
( → P. 239)●
Is the shift lever in P? ( → P. 241)●
Is the electronic key anywhere detectable inside the vehicle? ( → P. 158)●
Is the steering wheel unlocked? ( → P. 242)●
Is the electronic key battery weak or depleted?
In this case, the hybrid system can be started in a temporary way. ( → P. 693)●
Is the 12-volt battery discharged? ( → P. 695)●
Is the power switch in ON mode?
If you cannot release the shift lever by depressing the brake pedal with the
power switch in ON mode ( → P. 250)●
It is locked automatically to prevent theft of the vehicle. ( → P. 242)
●
Is the window lock switch pressed?
The power window except for the one at the driver’s seat cannot be operated
if the window lock switch is pressed. ( → P. 196)
●
The auto power off function will be operated if the vehicle is left in
ACCESSORY or ON mode (the hybrid sy stem is not operating) for a period
of time. ( → P. 241)If you think something is wrong The hybrid system does not start
The shift lever cannot be shifted from P even if you depress the brake
pedal
The steering wheel cannot be turned after the hybrid system is stopped
The windows do not open or close by operating the power window
switches
The power switch is turned off automatically

772 Alphabetical index
RX450h_RX450hL _U_OM48F85UBack door
Power back door .................................142
Touchless power back door ......... 144
Wireless remote control ..................142
Back-up lights
Replacing light bulbs ........................637
Wattage ....................................................719
Battery (12-volt battery)
Battery checking ............................... 605
If the 12-volt battery is
discharged ........................................ 695
Preparing and checking before
winter ................................................... 390
Replacing .............................................. 698
Warning light ...................................... 660
Battery (traction battery) ..................... 78
Blind Spot Monitor (BSM)..................319
Blind Spot Monitor
function ............................................ 323
Rear Cross Traffic Alert
function ............................................ 327 Bluetooth ®
............................................. 482
Audio system ....................................... 459
Hands-free system
(for cellular phone) .........................461
Bottle holders .........................................537
Brake
Brake Hold ........................................... 256
Fluid ............................................................ 716
Parking brake ...................................... 253
Regenerative braking ..........................76
Warning light ...................................... 660
Brake assist ............................................. 382
Brake Hold.............................................. 256
Warning light .........................................661
Break-in tips ............................................. 214
Brightness control
Instrument panel light control ........ 98
BSM (Blind Spot Monitor) ................. 319
Blind Spot Monitor function......... 323
Rear Cross Traffic Alert
function.................................................327B

773Alphabetical index
RX450h_RX450hL _U_OM48F85UCare
Aluminum wheels ............................... 581
Exterior................................................... 580
Interior .................................................... 584
Seat belts ............................................... 585
Self-restoring coat ............................ 580
Cargo capacity............................ 220, 710
Cargo hooks .......................................... 540
Cargo net hooks ................................... 540
Chains .........................................................391
Child restraint system............................ 55
Booster seats installation................... 64
Convertible seats
installation .............................................. 62
Front passenger occupant
classification system ......................... 47
Infant seats definition .............................61
Infant seats installation ........................ 57
Installing CRS with LATCH
anchors ................................................... 67
Installing CRS with seat
belts ............................................................61
Installing CRS with top tether
strap.......................................................... 70
LATCH anchors ................................... 67 Child safety .................................................... 54
12-volt battery
precautions .......................... 609, 700
Airbag precautions.............................. 39
Child restraint system......................... 55
How your child should
wear the seat belt .............................. 33
Installing child restraints .................... 55
Moon roof precautions .................. 203
Panoramic moon roof
precautions ....................................... 207
Power back door
precautions ......................................... 152
Power window lock switch.............196
Power window precautions ...........199
Rear door child-p rotectors ............139
Removed key battery
precautions .........................................631
Seat belt extender
precautions .......................................... 35
Seat belt precautions .......................... 35
Seat heater precautions ................. 525C

775Alphabetical index
RX450h_RX450hL _U_OM48F85UDrive information .................................. 105
Drive-start control ..................... 213, 249
Driver’s seat belt reminder light ..... 662
Driver’s seat position memory ........... 181
Driving
Break-in tips ...........................................214
Correct posture.....................................30
Driving mode select switch ..........379
Hybrid vehicle driving tips............ 388
Procedures ............................................. 212
Winter drive tips ................................ 390
Driving position memory...................... 181
Memory recall function.................... 184
Power easy access system .............. 181
Dynamic radar cruise control
with full-speed range ....................... 306 E-Four ....................................................... 383
ECB (Electronically Controlled
Brake System) .................................... 382
Eco drive mode......................................379
EDR (Event data recorder).....................11
Electric motor
Location .....................................................74
Specification ........................................... 712
Electric Power Steering (EPS) ....... 383
Warning light .........................................661
Electronic key .......................................... 132
Battery-saving function ....................159
If the electronic key does not
operate properly ............................ 692
Replacing the battery ......................630
Electronically Controlled
Brake System (ECB) ....................... 382
Emergency flashers ............................ 652 E

776 Alphabetical index
RX450h_RX450hL _U_OM48F85UEmergency, in case of
If a warning buzzer sounds.......... 660
If a warning light turns on.............. 660
If a warning message is
displayed.............................................667
If the 12-volt battery is
discharged ........................................ 695
If the electronic key does not
operate properly.............................692
If the hybrid system will
not start ............................................... 690
If you have a flat tire ..........................673
If you lose your keys ................ 133, 135
If you think something is
wrong .................................................. 659
If your vehicle becomes
stuck ..................................................... 706
If your vehicle has to
be stopped in an
emergency........................................ 653
If your vehicle needs to be
towed................................................... 654
If your vehicle overheats ................702
Energy monitor ....................................... 124 Engine
ACCESSORY mode ..................... 240
Compartment ..................................... 597
Engine switch ...................................... 239
Hood........................................................595
How to start the hybrid
system .................................................. 239
Identification number......................... 712
If your vehicle has to be
stopped in an emergency..........653
Ignition switch (power switch) .... 239
Overheating......................................... 702
Power switch ....................................... 239
Engine coolant
Capacity................................................... 715
Checking ................................................ 601
Preparing and checking
before winter ....................................390
Engine coolant temperature
gauge .........................................................96
Engine oil
Capacity................................................... 713
Checking .............................................. 598
Preparing and checking
before winter ....................................390
Engine oil maintenance data ........... 600
Engine switch ......................................... 239
Enhanced VSC ..................................... 382
EPS
(Electronic Power Steering) ........ 383
Warning light .........................................661
EV drive mode .......................................244
EV indicator ............................................... 76
Event data recorder (EDR).....................11