key battery Lexus ES350 2018 s / LEXUS 2018 ES350 (OM06134U) Owner's Guide

4908-2. Steps to take in an emergency
ES350_OM_OM06134U_(U)
■If “Power Turned Off to Save Battery” is shown
Power was turned off due to the automatic power off function.
Next time when starting the engine, increase the engine speed slightly and maintain that
level for approximately 5 minu tes to recharge the battery.
■If “Forward Camera System Unavailable” or “Forward Camera System Unavailable
Clean Windshield” is displayed. (if equipped)
The following systems may be suspended until the problem shown in the message is
resolved. (→P. 197, 482)
●PCS (Pre-Collision System)
●LDA (Lane Departure Alert with steering control)
●Dynamic radar cruise control
●Automatic High Beam
■When a message that indicates the need for the shift lever operation is shown
To prevent the shift lever from being operat ed incorrectly or the vehicle from moving
unexpectedly, a message that re quires shifting the shift lever may be shown on the multi-
information display. In that case, follow the instruction of the message and shift the shift
lever.
■If “Visit Your Dealer” is shown
The system or part shown on the multi-info rmation display is malfunctioning. Have the
vehicle inspected by your Lexus dealer immediately.
■If “See Owner’s Manual” is shown
●If the following message is shown, following the instructions, accordingly.
• “Engine Coolant Temp High” ( →P. 510)
●If the following mess age is shown, there may be a malfunction.
Immediately have the vehicle inspected by your Lexus dealer.
• “Check Access System with Elec. Key”
●If the following messages are sh own, there may be a malfunction.
Immediately stop the vehicle in a safe place and contact your Lexus dealer. Continuing
to drive the vehicle may be dangerous.
• “Braking Power Low Stop in a Safe Place”
• “Charging System Malfunction”
• “Oil Pressure Low Stop in a Safe Place”
■Warning buzzer
In some cases, the buzzer may not be heard because of noisy place or an audio sound.

502
ES350_OM_OM06134U_(U)8-2. Steps to take in an emergency
If the engine will not start
One of the following may be the cause of the problem:
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●The engine may be flooded.
Try to restart the engine again follo
wing correct starting procedures.
(→ P. 154)
●There may be a malfunction in th e engine immobilizer system. (→P. 65)
One of the following may be the cause of the problem:
●The battery may be discharged. ( →P. 506)
●The battery terminal connections may be loose or corroded.
The engine starting system may be malfun ctioning due to an electrical problem
such as electronic key battery depletio n or a blown fuse. However, an interim
measure is available to start the engine. ( →P. 503)
One of the following may be the cause of the problem:
●One or both of the battery terminals may be disconnected.
●The battery may be discharged. ( →P. 506)
●There may be a malfunction in the steering lock system.
Contact your Lexus dealer if the problem cannot be repaired, or if repair procedures
are unknown.
If the engine will not start even though correct starting procedures are being
followed (→P. 154), consider each of the following points:
The engine will not start even thoug h the starter motor operates nor-
mally.
The starter motor turns over slowly , the interior lights and headlights
are dim, or the horn does not sound or sounds at a low volume.
The starter motor does not turn over
The starter motor does not turn over, the interior lights and headlights
do not turn on, or the horn does not sound.

504
ES350_OM_OM06134U_(U)8-2. Steps to take in an emergency
If the electronic key does not operate properly
■Doors
Use the mechanical key (
→P. 92) in
order to perform the following oper-
ations:
Locks all the doors
Closes the windows and moon
roof (turn and hold)
*
Unlocks the door
Turning the key rearward unlocks the
driver’s door. Turning the key once
again within 5 seconds unlocks the
other doors.
Opens the windows and moon roof (turn and hold)*
*
: This setting must be custom ized at your Lexus dealer.
■Trunk
Turn the mechanical key clockwise
to open.
An alarm will sound if the alarm is set.
(→ P. 67)
If communication between the electronic key and vehicle is interrupted
(→ P. 110) or the electronic key ca nnot be used because the battery is
depleted, the smart access system with push-button start and wireless
remote control cannot be used. In su ch cases, the doors and trunk can be
opened and the engine can be started by following the procedure below.
Locking and unlocking the doors, unlocking the trunk and key linked
functions
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5058-2. Steps to take in an emergency
ES350_OM_OM06134U_(U)
8
When trouble arises
Ensure that the shift lever is in P and depress the brake pedal.
Touch the Lexus emblem side of the
electronic key to the engine switch.
The engine switch will turn to IGNI-
TION ON mode.
When the smart access system with
push-button start is deactivated in cus-
tomization setting, the engine switch will
turn to ACCESSORY mode.
Firmly depress the brake pedal and check that is shown on the multi-
information display.
Press the engine switch.
In the event that the engine still cannot be started, contact your Lexus dealer.
■Stopping the engine
Shift the shift lever to P and press the engine switch as you normally do when stopping
the engine.
■Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the electronic
key battery be replaced immediately when the battery is depleted. ( →P. 457)
■Changing engine switch modes
Release the brake pedal and press the engine switch in step above.
The engine does not start and modes will be changed each time the switch is pressed.
( → P. 155)
■When the electronic key does not work properly
●Make sure that the smart access system wi th push-button start has not been deacti-
vated in the customization setting. If it is off, turn the function on.
(Customizable features →P. 538)
●Check if battery-saving mode is set. If it is set, cancel the function. (→P. 109)
Starting the engine
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WARNING
■When using the mechanical key and operating the power windows or moon roof
Operate the power window or moon roof afte r checking to make sure that there is no
possibility of any passenger having any of their body parts caught in the window or
moon roof.
Also, do not allow children to op erate the mechanical key. It is possible for children and
other passengers to get caught in the power window or moon roof.
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506
ES350_OM_OM06134U_(U)8-2. Steps to take in an emergency
If the battery is discharged
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.
Confirm that the electronic key is
being carried.
When connecting the jumper (or
booster) cables, depe nding on the situa-
tion, the alarm may activate and doors
locked. ( →P. 68)
Open the hood (→ P. 427)
Remove the engine cover.
The following procedures may be used to start the engine if the vehicle’s bat-
tery is discharged.
You can also call your Lexus deal er or a qualified repair shop.
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5088-2. Steps to take in an emergency
ES350_OM_OM06134U_(U)
■Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
■To prevent battery discharge
●Turn off the headlights and the audio system while the engine is stopped.
●Turn off any unnecessary electrical components when the vehicle is running at a low
speed for an extended period, such as in heavy traffic.
■Charging the battery
The electricity stored in the battery will disc harge gradually even when the vehicle is not
in use, due to natural discharge and the draini ng effects of certain electrical appliances. If
the vehicle is left for a long time, the battery may discharge, and the engine may be
unable to start. (The battery recharges automatically during driving.)
■When recharging or replacing the battery
●In some cases, it may not be possible to un lock the doors using the smart access system
with push-button start when the battery is discharged. Use the wireless remote control
or the mechanical key to lock or unlock the doors.
●The engine may not start on the first attempt after the battery has recharged but will
start normally after the second attempt. This is not a malfunction.
●The engine switch mode is memorized by the vehicle. When the battery is recon-
nected, the system will return to the mode it was in before the battery was discharged.
Before disconnecting the battery, turn the engine switch off.
If you are unsure what mode the engine switch was in before the battery discharged, be
especially careful when reconnecting the battery.

560What to do if... (Troubleshooting)
ES350_OM_OM06134U_(U)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, ne w genuine mechanical keys can be made
by your Lexus dealer. ( →P. 93)
●If you lose your electronic keys, the risk of vehicle theft increases significantly.
Contact your Lexus dealer immediately. (→ P. 94)
●Is the electronic key battery weak or depleted? ( →P. 457)
●Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. (→P. 155)
●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. 110)
●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. 98)
●The function to prevent the electronic key from being left inside the trunk will
operate and you can open th e trunk as usual. Take the key out from the trunk.
(→ P. 103)
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
The trunk lid is closed with the electronic key left inside

561What to do if... (Troubleshooting)
ES350_OM_OM06134U_(U)
●Did you press the engine switch while firmly depressing the brake pedal?
(→ P. 154)
●Is the shift lever in P? ( →P. 156)
●Is the electronic key anywhere detectable inside the vehicle? ( →P. 108)
●Is the steering wheel unlocked? (→ P. 157)
●Is the electronic key battery weak or depleted?
In this case, the engine can be started in a temporary way. (→P. 505)
●Is the battery discharged? ( →P. 506)
●Is the engine switch in IGNITION ON mode?
If you cannot release the shift lever by depressing the brake pedal with the
engine switch in IGNITION ON mode (→ P. 162)
●It is locked automatically to prevent theft of the vehicle. ( →P. 156)
●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. 131)
●The auto power off function will be operated if the vehicle is left in ACCES-
SORY or IGNITION ON mode (the engine is not running) for a period of
time. ( →P. 156)
If you think something is wrong
The engine 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 engine is stopped
The windows do not open or close by operating the power window
switches
The engine switch is turned off automatically

566Alphabetical index
ES350_OM_OM06134U_(U)
Child restraint systemBooster seats, definition ......................51
Booster seats, installation..................60
Convertible seats, definition ..............51
Convertible seats, installation ........ 58
Front passenger occupant classification system ......................... 44
Infant seats, definition ............................51
Infant seats, installation ...................... 58
Installing CRS with LATCH anchors .....................56
Installing CRS with seat belts ......... 58
Installing CRS with top tether strap ...........................61
Child safety ................................................ 50 Airbag precautions .............................. 37
Battery precautions ...........................438, 509
Child restraint system ...........................51
How your child should wear the seat belt ............................................31
Installing child restraints.....................55
Moon roof precautions.....................137
Power window lock switch .............. 131
Power window precautions .......... 133
Rear door child-protectors .............98
Removed electronic key battery precautions.............. 458
Seat belt extender precautions ........................................... 33
Seat belt precautions .......................... 33
Seat heater precautions..................375
Trunk precautions............................... 104 Child-protectors ..................................... 98
Cleaning
Aluminum wheels ................................ 413
Exterior ..................................................... 412
Interior .......................................................415
Seat belts..................................................416
Clock......................................................... 387
Coat hooks ............................................. 392
Condenser.............................................. 435
Console box .............................................381
Console box light ...................................381
Consumption screen ............................. 86
Cooling system Engine overheating ........................... 510
Cruise control Cruise control ....................................... 219
Dynamic radar cruise control ..... 207
Cup holders............................................ 382
Curtain shield airbags ........................... 35
Customizable features ...................... 538
Daytime running light system............ 166
Defogger Front windshield................................. 370
Outside rear view mirrors ............ 370
Rear window........................................ 370
Dimension ................................................. 516
Dinghy towing ......................................... 153
Display Dynamic radar cruise control ..... 207
LDA (Lane Departure Alert with steering control) .................... 198
Multi-information display..................80
Trip information ..................................... 87
Warning message............................ 488
D

567Alphabetical index
ES350_OM_OM06134U_(U)
Display Audio system ......................... 268Display settings .................................. 285
Setup menu .......................................... 280
Do-it-yourself maintenance ............. 425
Door courtesy lights Location .................................................. 377
Wattage ..................................................524
Doors Automatic door locking and unlocking system......................98
Door glasses ........................................... 131
Door lock .................................................. 97
Outside rear view mirrors .............. 128
Rear door child-protector................98
Driver’s seat position memory ........... 117 Driving position memory .................. 118
Memory recall function...................... 119
Power easy access system .............. 117
Driving Break-in tips ...........................................142
Correct driving posture .................... 28
Driving mode select switch .......... 247
Procedures ............................................ 140
Winter drive tips ................................. 262
Dynamic radar cruise control Function ..................................................207
Eco drive mode ......................................247
Eco Driving Indicator............................. 84
EDR (Event data recorder) ...................10 Electric Power Steering (EPS)
Function ..................................................258
Warning light .......................................483
Electronic key ............................................92 Battery-saving function ..................... 110
If the electronic key does not operate properly ............................504
Replacing the battery ...................... 457
Emergency, in case of If a warning buzzer sounds ................................................. 482
If a warning light turns on .............. 482
If a warning message is displayed ....................................... 488
If the battery is discharged........... 506
If the electronic key does not operate properly ........504
If the engine will not start ...............502
If you have a flat tire ............................491
If you think something is wrong ............................................. 480
If your vehicle becomes stuck........................................................513
If your vehicle has to be stopped in an emergency.......... 475
If your vehicle needs to be towed ....................................... 476
If your vehicle overheats ................. 510
Emergency flashers ............................. 474
E