key battery Lexus ES300h 2019 (OM33D00U) Owner's Guide

3797-2. Steps to take in an emergency
7
When trouble arises
One of the following may be the cause
of the problem:
The electronic key may not be func-
tioning properly. ( P.383)
 There may not be sufficient fuel in
the vehicle’s tank.
Refuel the vehicle. ( P.161)
 There may be a malfunction in the
immobilizer system. ( P.60)
 There may be a malfunction in the
steering lock system.
 The hybrid system may be malfunc-
tioning due to an electrical problem
such as electronic key battery
depletion or a blown fuse. However,
depending on the type of malfunc-
tion, an interim measure is available
to start the hybrid system.
One of the following may be the cause of the problem:

The 12-volt battery may be dis-
charged. ( P.384)
 The 12-volt battery terminal con-
nections may be lo ose or corroded.
( P.325)
One of the following may be the cause
of the problem:
 The 12-volt battery may be dis-
charged. ( P.384)
 One or both of the 12-volt battery
terminals may be disconnected.
( P.325)
Contact your Lexus dealer if the problem
cannot be repaired, or if repair procedures
are unknown.
When the hybrid syst em does not start,
the following steps can be used as an
interim measure to start the hybrid sys-
tem if the power switch is functioning
normally.
Do not use this starting procedure
except in cases of emergency.
1 Press the parking brake switch to
check that the parking brake is set.
(P.146)
Parking brake indicator will come on.
2 Shift the shift lever to P.
If the hybrid system will not
start
Reasons for the hybrid system not
starting vary depending on the situ-
ation. Check the following and per-
form the appropriate procedure:
The hybrid system will not start
even though the correct starting
procedure is being followed.
( P.135)
The interior lights and head-
lights are dim, or the horn does
not sound or sounds at a low vol-
ume.
The interior lights and head-
lights do not turn on, or the horn
does not sound.
Starting the hybrid system in an
emergency

3817-2. Steps to take in an emergency
7
When trouble arises
Remove the cover inside the trunk and
pull the lever.
Using the lever to open the fuel filler door
may not allow for an adequate reduction in
fuel tank pressure before refueling. To pre-
vent fuel from spilling out, turn the cap
slowly when removing it. During refueling,
fuel may spill out from the filler opening
due to air being discharged from inside the
fuel tank. Therefore, f ill the fuel tank care-
fully and slowly.
■When the electronic key does not work
properly
●Make sure that the smart access system
with push-button start has not been deac-
tivated using the Remote Touch or at your
Lexus dealer. If it is off, turn the function
on.
●Check if battery-saving mo de is set. If it is
set, cancel the function. ( P.103)
Use the mechanical key ( P.90) in
order to perform th e following opera-
tions:
If the fuel filler door cannot
be opened
If the fuel filler door opener switch
cannot be operated, contact your
Lexus dealer to service the vehicle.
In case where refueling is urgently
necessary, the following procedure
can be used to open the fuel filler
door.
Opening the fuel filler door
If the electronic key does not
operate properly
If communication between the
electronic key and vehicle is inter-
rupted ( P.103) or the electronic
key cannot be used because the
battery is depleted, the smart
access system with push-button
start and wireless remote control
cannot be used. In such cases, the
doors and trunk can be opened and
the hybrid system can be started by
following the procedure below.
NOTICE
■In case of a smart access system with
push-button start malfunction or
other key-rela ted problems
Take your vehicle with all the electronic
keys provided with your vehicle to your
Lexus dealer as soon as possible.
Locking and unlocking the
doors, opening the trunk and
using the key linked functions

3837-2. Steps to take in an emergency
7
When trouble arises
1Ensure that the shift lever is in P and
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 customization
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 shortly and
firmly.
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 lever 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 recomme nded that the elec-
tronic key battery be replaced immediately
when the battery is depleted. ( P.339)
■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.137)Starting the hybrid system

3847-2. Steps to take in an emergency
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 using the following procedure.
1Confirm 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.63)
2 Open the hood ( P.316) and
open the fuse box cover.
Push the tab 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 cable to on the second vehicle.
If the 12-volt battery is dis-
charged
The following procedures may be
used to start the hybrid 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

3867-2. Steps to take in an emergency
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.423)
■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 gradua lly 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 12-volt battery that conforms to
European regulations.
●Use a 12-volt battery that the case size is
same as the previous one (LN2), 20 hour
rate capacity (20HR) is equivalent
(60Ah) or greater, and performance rat-
ing (CCA) is equivalent (345A) or
greater.
• If the sizes differ, the 12-volt battery can- not be properly secured.
• 12-volt battery performance may decrease and the hybrid system may not
be able to start.
• 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 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 exchanging, firmly attach the fol-
lowing items to the exhaust hole of the 12-
volt battery.
• Use the exhaust hose that was attached to the 12-volt battery before exchanging.
• Use the exhaust hole plug included with the 12-volt battery exchanged or the one
installed on the battery prior to the
exchange. (Depending on the 12-volt
battery to be exchanged, the exhaust
hole may be plugged.)

438What to do if... (Troubleshooting)
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.380)
 If you lose your electronic keys, the
risk of vehicle theft increases signifi-
cantly. Contact your Lexus dealer
immediately. ( P.380)
 Is the electronic key battery weak or
depleted? ( P.339)
 Is the power switch in ON mode?
When locking the doors, turn the power
switch off. ( P.137)
 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.103) 
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.94)
 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.99)
 Did you press the power switch
while firmly depressing the brake
pedal? ( P.135)
 Is the shift lever in P? ( P.141)
 Is the electronic key anywhere
detectable inside the vehicle?
( P.102)
 Is the steering wheel unlocked?
( P.135)
 Is the electronic key battery weak or
depleted?
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 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

442Alphabetical index
Exterior .......................................................... 300
Interior .............................................................303
Seat belts........................................................303
Cargo capacity...............................................133
Cargo hooks ................................................... 271
Center Display ............................................. 246
Chains .............................................................. 243
Child-protectors............................................. 94
Child restraint system................................... 42 Fixed with a LATCH system .................. 49
Fixed with a seat belt................................... 46
Front passenger occupant classification system ..............................................................37
Points to remember .....................................42
Riding with children ......................................42
Types of child restraint system installation method ........................................................... 43
Using an anchor bracket ............................ 51
Child safety ....................................................... 42 12-volt battery precautions ....... 324, 387
Airbag precautions...................................... 33
Child restraint system................................. 43
Heated steering wheel and seat heater precautions.................................................. 261
How your child should wear the seat belt 25
Moon roof precautions ............................ 123
Power window lock switch.......................121
Power window precautions .....................121
Rear door child-protectors ..................... 94
Removed electronic key battery precau- tions ...............................................................340
Seat belt extender precautions ............. 25
Seat belt precautions ...................................42
Trunk precautions ........................................ 95
Cleaning.............................................. 300, 303 Aluminum wheels ..................................... 300
Exterior .......................................................... 300
Interior .............................................................303
Radar sensor.......................................163, 198
Seat belts........................................................303
Clock ........................................................ 70, 272 Coat hooks..................................................... 283
Compass ......................................................... 289
Condenser .......................................................321
Console box .................................................. 269
Console box light ........................................ 269
Cooling system............................................. 320
Engine overheating.................................. 388
Hybrid system overheating ................. 389
Cornering lights .............................................152 Replacing light bulbs ................................344
Cruise control Dynamic radar cruise control with full-
speed range ............................................... 187
Cup holder ..................................................... 269
Current fuel consumption ...........................74
Curtain shield airbags .................................. 28
Customizable features ................................ 412
D
Daytime running light system .................. 150
Defogger Outside rear view mirrors.....................254
Rear window ................................................254
Windshield ....................................................254
Dimension ...................................................... 394
Dinghy towing.................................................134
Display BSM (Blind Sport Monitor)....................197
Dynamic radar cruise control with full-
speed range ............................................... 187
Energy monitor ............................................... 81
Head-up display.............................................77
Intuitive parking assist ............................. 205
LTA (Lane-Tracing Assist) ...................... 181
Multi-information display .......................... 73
Parking Support Brake function (rear pedestrians)............................................... 233
RCD (Rear Camera Detection) ......... 215
RCTA.................................................................. 211
Warning message .................................... 368
Distance until next engine oil change .....72
Do-it-yourself maintenance ..................... 310

443What to do if... (Troubleshooting)Alphabetical index443
Door courtesy lights ................................... 265
Door lockDoors.................................................................... 91
Smart access system with push-button start ..................................................................102
Wireless remote control........................... 89
Doors ..................................................................... 91 Automatic door lock ing and unlocking
system ............................................................. 94
Door glasses ..................................................120
Door lock............................................................ 91
Open door warning buzzer .......... 92, 94
Outside rear view mirrors ........................117
Rear door child-protectors ..................... 94
Drive distance ...................................................74
Drive info 1/Drive info 2 ...............................74
Driver’s seat position memory .................. 110 Driving position memory.......................... 110
Memory recall function ............................... 111
Drive-start control ........................................ 127
Driving................................................................ 126 Break-in tips ................................................... 127
Correct driving posture .............................23
Driving Mode Select switch................. 202
Hybrid vehicle driving tips .................... 240
Procedures ..................................................... 126
Winter drive tips......................................... 242
Driving information display .........................74
Driving Mode Select switch.................... 202
Driving range ....................................................74
Driving support system information display 75
Dynamic radar cruise control with full- speed range..................................................187Warning message...................................... 195
E
ECB (Electronically Controlled Brake Sys- tem) ................................................................ 236
Eco drive mode ............................................ 202
EDR (Event data recorder) ........................... 8
Elapsed time ......................................................74 Electric motor (traction motor) ................ 53
Electric Power Steering (EPS)
Function ..........................................................236
Warning light .............................................. 360
Electronically Controlled Brake System (ECB) ............................................................ 236
Electronic key .................................................. 88 Battery-saving function............................ 103
If the electronic key does not operate properly ........................................................ 381
Replacing the battery ...............................339
Emergency, in case of If a warning buzzer sounds.................. 358
If a warning light turns on...................... 358
If a warning message is displayed .... 368
If the 12-volt battery is discharged ... 384
If the electronic key does not operate properly ........................................................ 381
If the fuel filler door cannot be opened ....
381
If the hybrid system will not start ........ 379
If the vehicle is trapped in rising water...... 351
If you have a flat tire .................................. 372
If you lose your keys ................................ 380
If you think something is wrong......... 356
If your vehicle becomes stuck .............. 391
If your vehicle has to be stopped in an emergency ................................................ 350
If your vehicle needs to be towed .....353
If your vehicle overheats ....................... 388
Emergency flashers ....................................350
Energy monitor .................................................81
Engine ACCESSORY mode................................137
Compartment............................................... 318
Hood ................................................................. 316
How to start the hybrid system............ 135
Identification number .............................. 395
If the hybrid system will not start ........ 379
If your vehicle has to be stopped in an emergency ................................................ 350

446Alphabetical index
Vehicle-equipped jack ........................... 373
Jack handle .................................................... 373
Jam protection function Moon roof ....................................................... 123
Power trunk opener and closer ............ 99
Power windows............................................120
K
Keyless entrySmart access system with push-button start ..................................................................102
Wireless remote control........................... 89
Keys...................................................................... 88 Battery-saving function ........................... 103
Electronic key .................................................88
If the electronic key does not operate properly........................................................ 381
If you lose your keys................................ 380
Key number plate .........................................88
Keyless entry ..................................91, 97, 102
Mechanical key..............................................88
Power switch .................................................135
Replacing the battery............................... 339
Warning buzzer ...........................................102
Wireless remote control........................... 89
Knee airbags .................................................... 28
L
Lane Tracing Assist (LTA) ......................... 176 Operation........................................................ 176
Warning messages ................................... 184
Language (multi-information display) ....75
LATCH anchors ............................................. 49
Lever Auxiliary catch lever ...................................316
Hood lock release lever...........................316
Internal trunk release lever ...................... 99
Shift lever............................................................141
Turn signal lever ...........................................145
Wiper lever.................................................... 155
Lexus climate concierge ............................251 Lexus Enform Safety Connect............... 292
Lexus Safety System+2.0 ..........................163
Automatic High Beam ............................. 153
Dynamic radar cruise control with full-
speed range ............................................... 187
LTA (Lane Tracing Assist) ......................176
PCS (Pre-Collision System) ................. 169
RSA (Road Sign Assist)........................... 185
License plate lights....................................... 150 Light switch .................................................... 150
Replacing light bulbs ................................344
Light bulbs Replacing ....................................................... 344
Wattage ......................................................... 400
Lights Automatic High Beam system ............. 153
Front interior lights ....................................266
Front personal lights.................................266
Headlight switch.......................................... 150
Interior lights list ..........................................265
Interior lights .................................................265
Rear interior lights .....................................266
Rear personal lights ..................................266
Trunk light .........................................................99
Turn signal lever .......................................... 145
Vanity lights .................................................. 272
Wattage ......................................................... 400
Welcome light illumination control ..... 151
Lock steering column ..................................135
Low profile tire.............................................. 326
LTA (Lane Tracing Assist) ......................... 176 Operation ........................................................176
Warning messages.................................... 184
Luggage mat ................................................... 271
M
Maintenance Do-it-yourself maintenance ...................314
General maintenance .............................. 310
Maintenance data ......................................394
Maintenance requirements ................. 309
Malfunction indicator la mp ..................... 359

448Alphabetical index
Warning light ............................................... 364
Warning message....................................... 147
Parking lights .................................................. 150 Light switch .................................................... 150
Parking Support Brake function (rear- crossing vehicles) ........................... 218, 229Function .......................................................... 229
Parking Support Brake function (rear pedestrians) ...................................... 218, 233Function .......................................................... 233
Parking Support Brake function (static objects) ............................................... 218, 224Function .......................................................... 224
PCS (Pre-Collision System) .....................169 Function ............................................................169
PCS OFF switch ............................................171
Warning light ............................................... 364
Personal lights............................................... 265
PKSA (Parking Support Alert) .............. 204
PKSB (Parking Support Brake)...............218 Warning message......................................222
Power control unit.......................................... 56
Power control unit coolant ...................... 320 Capacity ......................................................... 397
Checking ....................................................... 320
Preparing and checking before winter ....242
Power easy access system ......................... 110
Power outlet ...................................................272
Power steering (Elect ric power steering
system).......................................................... 236 Warning light ...............................................360
Power switch ...................................................135 Auto power off function ........................... 137
Changing the power switch modes .. 137
If your vehicle has to be stopped in an
emergency ............................................... 350
Starting the hybrid system.......................135
Power trunk lid ................................................ 95
Power windows ..............................................120 Door lock linked window operation....121
Jam protection function..............................121 Operation ....................................................... 120
Window lock switch.................................... 121
Pre-Collision System (PCS) .....................169 Function ........................................................... 169
PCS OFF switch ........................................... 171
Warning light ...............................................364
R
Radar cruise control (dynamic radar cruise control with full-speed range)...............187
Radiator .............................................................321
RCD (Rear Camera Detection) ........... 204 Function ........................................................... 215
Warning message .......................................216
RCTA (Rear Cross Traffic Alert) .204, 211
RCTA Function ............................................................. 211
Warning message ....................................... 212
Rear Cross Traffic Alert (RCTA) .204, 211
Rear door sunshades ...................................281
Rear seats Head restraints............................................... 113
Rear side marker lights .............................. 150 Light switch .................................................... 150
Rear sunshades ..............................................281
Rear turn signal lights ..................................145 Replacing light bulbs ................................344
Turn signal lever .......................................... 145
Rear view mirror Inside rear view mirror ............................... 116
Outside rear view mirrors........................ 117
Rear window defogger ............................. 254
Refueling ............................................................ 161 Capacity ........................................................ 395
Fuel types ...................................................... 395
If the fuel filler door cannot be opened ....
381
Opening the fuel tank cap ....................... 161
Regenerative braking ................................... 54
Remote Touch .............................................. 246
Replacing Electronic key battery ..............................339