2019 LEXUS LS500H key battery

4447-2. Steps to take in an emergency
LS500h_OM_(U)_1809
■Key linked functions
1Closes the windows and the moon
roof (turn and hold)
2 Opens the windows and the moon
roof (turn and hold)
These settings must be customized at your
Lexus dealer.
1 Depress the brake pedal. 2
Touch the Lexus emblem side of the
electronic key to the power switch.
When the electronic key is detected, a
buzzer sounds and the power switch will
turn to ON mode.
When the smart access system with
push-button start is deactivated in custom-
ization setting, the power switch will turn to
ACCESSORY mode.
3Firmly depress the brake pedal and
check that is shown on the
multi-information display.
4 Press the power switch.
In the event that the hybrid system still
cannot be started, contact your Lexus
dealer.
■Stopping the hybrid system
Set the parking brake, shift the shift position
to P and press the power switch as you nor-
mally do when stopping the hybrid system.
■Electronic key battery
As the above procedure is a temporary
measure, it is recommended that the elec-
tronic key battery be replaced immediately
when the battery is depleted. ( P.409)
■Changing power switch modes
Release the brake pe dal and press the
power switch in step 3 above. The hybrid
system does not start and modes will be
changed each time the switch is pressed.
(  P.172)
WARNING
■When using the mechanical key and
operating the power windows or
moon roof
Operate the power window or moon
roof after checking to make sure that
there is no possibilit y of any passenger
having any of their body parts caught in
the window or moon roof.
Also, do not allow ch ildren to operate the
mechanical key. It is possible for children
and other passengers to get caught in
the power window or moon roof.
Starting the hybrid system

4457-2. Steps to take in an emergency
LS500h_OM_(U)_1809
7
When trouble arises
If you have a set of jumper (or booster)
cables and a second vehicle with a
12-volt battery, you can jump start your
vehicle by following the steps below.
Method connecting jumper (or
booster) cables to the 12-volt bat-
tery
1 Confirm that the electronic key is
being carried.
When connecting the jumper (or booster)
cables, depending on the situation, the
alarm may activate and doors locked.
( P.74)
2 Open the trunk lid and remove the
luggage mat. ( P.350)
In the event that the trunk opener cannot
be used, use the mechanical key to open
the trunk. (P.443)
3 Connect a positive jumper cable clamp to on your vehicle and connect the
clamp on the other end of the positive cab le to on the second vehicle. Then,
connect a negative cable clamp to on the second vehicle and connect the
clamp at the other end of the negative cable to .
Positive (+) battery terminal (your vehicle)
Positive (+) battery terminal (second vehicle)
Negative (-) battery terminal (second vehicle)
Negative (-) battery terminal (your vehicle)
If the 12-volt battery is dis-
charged
The following procedures may be
used to start the hy brid system if the
12-volt battery is discharged.
You can also call your Lexus dealer
or a qualified repair shop.
Restarting the hybrid system
A
B
C
D
A
B
C
D

4467-2. Steps to take in an emergency
LS500h_OM_(U)_1809
4Start the engine of the second vehi-
cle. Increase the engine speed
slightly and maintain at that level for
approximately 5 minutes to
recharge the 12-volt battery of your
vehicle.
5 Open and close any of the doors of
your vehicle with the power switch
off.
6 Maintain the engine speed of the
second vehicle and start the hybrid
system of your vehicle by turning
the power switch to ON mode.
7 Make sure the “READY” indicator
comes on. If the indicator does not
come on, contact your Lexus
dealer.
8 Once the hybrid system has
started, remove the jumper cables
in the exact reverse order from
which they were connected.
Method connecting jumper (or
booster) cables to the exclusive
jump starting terminal
1 Confirm that the electronic key is
being carried.
When connecting the jumper (or booster)
cables, depending on the situation, the
alarm may activate and doors locked. (
 P.74)
2 Open the hood. Remove the driver
side engine compartment cover
and fuse box cover. ( P.382,
385)
Push the tabs in and lift the lid off.
3 Open the exclusive jump starting
terminal cover.
4 Connect a positive jumper cable clamp to on your vehicle and connect the
clamp on the other end of the positive cab le to on the second vehicle. Then,
A
B

4487-2. Steps to take in an emergency
LS500h_OM_(U)_1809
●Turn off any unnecessary electrical com-
ponents when the vehicle is running at a
low speed for an extended period, such
as in heavy traffic.
■When the 12-volt battery is removed or
discharged
●Information stored in the ECU is cleared.
When the 12-volt battery is depleted,
have the vehicle inspected at your Lexus
dealer.
●Some systems may require initialization.
( P.494)
■When removing the 12-volt battery ter-
minals
When the 12-volt battery terminals are
removed, the information stored in the
ECU is cleared. Before removing the
12-volt battery terminals, contact your
Lexus dealer.
■Charging the 12-volt battery
The electricity stored in the 12-volt battery
will discharge gradually even when the
vehicle is not in use, due to natural dis-
charge and the draining effects of certain
electrical appliances. If the vehicle is left for
a long time, the 12-volt battery may dis-
charge, and the hybrid system may be
unable to start. (The 12-volt battery
recharges automatically while the hybrid
system is operating.)
■When recharging or replacing the
12-volt battery
●In some cases, it may not be possible to
unlock the doors using the smart access
system with push-button start when the
12-volt battery is discharged. Use the
wireless remote control or the mechani-
cal key to lock or unlock the doors.
●The hybrid system may not start on the
first attempt after the 12-volt battery has
recharged but will start normally after the
second attempt. This is not a malfunction.
●The power switch mode is memorized by
the vehicle. When the 12-volt battery is
reconnected, the system will return to the
mode it was in before the 12-volt battery
was discharged. Before disconnecting
the 12-volt battery, turn the power switch
off. If you are unsure what mode the power
switch was in before
the 12-volt battery
discharged, be especially careful when
reconnecting the 12-volt battery.
■When replacing the 12-volt battery
●Use a Central Degassing type 12-volt
battery (European Regulations).
●Use a 12-volt battery with the same case
size as the previous 12-volt battery and an
equivalent 20 hour rate capacity (20HR)
or greater.
• If the sizes differ, the 12-volt battery can- not be properly secured.
• If the 20 hour rate capacity is low, even if
the time period where the vehicle is not
used is a short time, the 12-volt battery
may discharge and the hybrid system
may not be able to start.
●Use a 12-volt battery with a handle. If a
12-volt battery without a handle is used,
removal is more difficult.
●After replacing, firm ly attach the follow-
ing items to the exhaust hole of the
12-volt battery.
• Use the exhaust hose that was attached to the 12-volt battery before replacing
and confirm that it is firmly connected to
the hole section of the vehicle.
• Use the exhaust hole plug included with the 12-volt battery re placed or the one
installed on the 12-volt battery prior to
the replacement. (Depending on the
12-volt battery to be replaced, the
exhaust hole may be plugged.)

506What to do if... (Troubleshooting)
LS500h_OM_(U)_1809
1-1.What to do if... (Troubleshooting)What to do if... (Troubleshooting)
 If you lose your mechanical keys,
new genuine mechanical keys can
be made by your Lexus dealer.
( P.442)
 If you lose your electronic keys, the
risk of vehicle theft increases signifi-
cantly. Contact your Lexus dealer
immediately. ( P.442)
 Is the electronic key battery weak or
depleted? ( P.409)
 Is the power switch in ON mode?
When locking the doors, turn the power
switch off. ( 
P.172)
Is the electronic key left inside the
vehicle?
When locking the doors, make sure that
you have the electronic key on your per-
son.
The function may not operate prop- erly due to the condition of the radio
wave. (
P.125)
 Is the child-protector lock set?
The rear door cannot be opened from
inside the vehicle when the lock is set.
Open the rear door from outside and then
unlock the child-protector lock. ( 
P.115)
The function to prevent the elec-
tronic key from being left inside the
trunk will operate and you can open
the trunk as usual. Take the key out
from the trunk. ( P.120)
 Did you press the power switch
while firmly depressing the brake
pedal? ( P.170)
 Is the electronic key anywhere
detectable inside the vehicle?
( P.124)
 Is the steering wheel unlocked?
( P.171)
 Is the electronic key battery weak or
depleted?
In this case, the hy brid system can be
If you have a problem, check the
following before contacting your
Lexus dealer.
The doors cannot be locked,
unlocked, opened or closed
You lose your keys
The electronic key does not
operate properly
The doors cannot be locked or
unlocked
The rear door cannot be opened
The trunk lid is closed with the
electronic key left inside
If you think something is wrong
The hybrid system does not start

510Alphabetical Index
LS500h_OM_(U)_1809
Buzzer Hands off steering wheel alert (LTA)............................................................. 244, 244
C
Card key .......................................................... 108
Care Aluminum wheels ......................................368
Exterior ...........................................................368
Interior ............................................................... 371
Seat belts.......................................................... 371
Cargo capacity.............................................. 168
Cargo net ....................................................... 350
Center Display ...............................................316
Chains ............................................................... 310
Child restraint system Fixed with a LATCH system .................. 53
Fixed with a seat belt................................... 49
Front passenger occupant classification system ............................................................. 40
Points to remember .................................... 45
Riding with children ..................................... 45
Types of child restraint system installation method ........................................................... 46
Using an anchor bracket .......................... 55
Child safety 12-volt battery precautions ........ 391, 449
Airbag precautions...................................... 34
Child restraint system................................. 46
Heated steering wheel and seat heater precautions................................................ 337
How your child should wear the seat belt ............................................................................ 25
Moon roof precautions ............................ 157
Power window lock switch.................... 156
Power window precautions .................. 155
Rear door child-protectors ..................... 115
Removed electronic key battery precau- tions ................................................................ 410
Seat belt extender precautions ............. 25
Seat belt precautions .................................. 45
Trunk precautions ........................................ 116 Child-protectors............................................. 115
Cleaning
Aluminum wheels ..................................... 368
Exterior........................................................... 368
Interior ...............................................................371
Radar sensor ................................... 200, 206
Seat belts ..........................................................371
Clock ................................................ 81, 85, 355
Clock light ........................................................341
Coat hooks..................................................... 354
Coin holder .................................................... 347
Condenser .....................................................388
Console box .................................................. 348
Cooling system............................................. 387 Engine overheating.................................. 450
Hybrid system overheating ................... 451
Cornering lights ............................................ 189
Cruise control Dynamic radar cruise control with full-speed range ......................... 245, 255
Cup holders ................................................... 347
Current fuel consumption .......................... 92
Curtain shield airbags .................................. 29
Customizable features .............................. 479
D
Daytime running light system ...................187
Defogger Outside rear view mirrors..................... 324
Rear window ................................................ 324
Windshield .................................................... 324
Differential Front differential oil............. .......................463
Rear differential oil......... ..................... .......463
Dimension ...................................................... 458
Dinghy towing.................................................169
Display Center Display ............................................. 316
Dynamic radar cruise control with full-speed range ......................................245
Energy monitor ............................................ 100
Head-up display............................................ 96

5111-1. What to do if... (Troubleshooting)
LS500h_OM_(U)_1809511Alphabetical Index
Intuitive parking assist.............................. 265
LTA (Lane Tracing Assist).................... 239
Multi-information display .......................... 90
Parking Support Brake function (rear pedestrians) .............................................. 294
RCD (Rear Camera Detection) ........ 275
RCTA ................................................................ 271
Warning message..................................... 434
Distance until next engine oil change .................................................... 83, 88
Do-it-yourself maintenance .................... 376
Door courtesy lights .....................................341
Door lock Doors...................................................................112
Smart access system with push-button start .................................................................. 123
Wireless remote control........................... 110
Doors Automatic door lock ing and unlocking
system ............................................................. 116
Door closer ..................................................... 115
Door glasses ..................................................154
Door lock...........................................................112
Open door warning buzzer ...........113, 115
Outside rear view mirrors ......................152
Rear door child-protectors ..................... 115
Drive distance .................................................. 92
Drive info 1/Drive info 2 .............................. 92
Driver’s seat position memory Driving position memory......................... 142
Memory recall function ............................145
Power easy access system ..................... 142
Drive-start control ......................................... 161
Driving Break-in tips .................................................... 161
Correct driving posture .............................23
Driving mode select switch .................. 297
Hybrid vehicle driving tips .................... 307
Procedures .................................................... 160
Winter drive tips.........................................309
Driving information display .......................... 91 Driving position memory............................ 142
Memory recall function............................ 145
Power easy access system .....................142
Driving range ................................................... 92
Driving support system information display ............................................................................. 93
DRS (Dynamic Rear Steering) .............. 302
Dynamic radar cruise control with full-speed range .............................245, 255Warning message .....................................253
Dynamic Rear Steering (DRS) .............. 302
E
ECB (Electronically Controlled Brake Sys-
tem) ................................................................ 302
EDR (Event data recorder) ........................... 8
Elapsed time ..................................................... 92
Electric motor (traction motor) ................ 63
Electric Power Steering (EPS) .............. 302 Warning light ............................................... 427
Electronic key ................................................ 108 Battery-saving function.............................124
If the electronic key does not operate properly .......................................................443
Replacing the battery .............................. 409
Electronically Controlled Brake System (ECB) ............................................................ 302
Electronically modulated air suspension .......................................................................... 298
Emergency flashers ......................................416
Emergency, in case of If a warning buzzer sounds................... 424
If a warning light turns on....................... 424
If a warning message is displayed ..... 434
If the 12-volt battery is discharged ....445
If the electronic key does not operate properly .......................................................443
If the fuel filler do or cannot be opened
.......................................................................... 442
If the hybrid system will not start ....... 440
If the vehicle is trapped in rising water ............................................................................417

514Alphabetical Index
LS500h_OM_(U)_1809
Paddle shift switches ........................ 180, 181
Snow mode .................................................... 179
Hybrid vehicle driving tips ....................... 307
I
I/M test ............................................................ 379
Identification Engine .............................................................459
Vehicle ............................................................458
Ignition switch (power switch) .................170 Auto power off function ........................... 173
Changing the power switch modes .. 172
If your vehicle has to be stopped in an
emergency ..................................................416
Immobilizer system .......................................... 71
Indicators ........................................................... 78
Initialization Items to initialize ......................................... 494
Maintenance .................................... 375, 387
Power windows............................................154
Tire pressure warning system .............398
Inside door handle lights ............................341
Inside rear view mirror ................................. 151
Instrument panel light control .......... 83, 89
Interior lights....................................................341 Front interior light ........................................341
Rear interior light .........................................341
Intuitive parking assist.....................263, 265 Function .......................................................... 265
Warning message..................................... 267
J
JackPositioning a floor jack............................ 382
Jam protection function Moon roof ....................................................... 157
Power trunk opener and closer .............121
Power windows............................................154
Rear door sunshade ................................ 357
K
Keyless entrySmart access system with push-button start ..................................................................123
Wireless remote control ........................... 110
Keys Battery-saving function.............................124
Electronic key ...............................................108
If the electronic key does not operate properly .......................................................443
If you lose your keys ................................. 442
Key number plate .......................................108
Keyless entry ......................................... 112, 123
Mechanical key ............................................ 108
Power switch................................................. 170
Replacing the battery .............................. 409
Warning buzzer ...........................................124
Wireless remote control ........................... 110
Knee airbags .................................................... 29
L
Lane change assist function .................... 233
Lane Tracing Assist (LTA) Operation ...................................................... 233
Warning messages...................................245
Language (multi-information display) ... 94
LATCH anchors ............................................. 53
LDH (Lexus Dynamic Handling system) .......................................................................... 303
Lever Auxiliary catch lever .................................382
Hood lock release lever .........................382
Internal trunk release lever....................... 121
Shift lever ..........................................................176
Turn signal lever .......................................... 182
Wiper lever .....................................................192
Lexus climate concierge ............................321
Lexus Dynamic Handling system (LDH) .......................................................................... 303
Lexus Enform Safety Connect.................. 58