Page 617 of 676

6178-2. Steps to take in an emergency
8
When trouble arises
IS200t_EE(OM53D77E)
■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 measur e, it is recommended that the electronic
key battery be replaced immediately when the battery is depleted. ( P. 527)
■Alarm (if equipped)
Using the mechanical key to lock the doors will not set the alarm system.
If a door is unlocked using the mechanical key when the alarm system is set, the alarm
may be triggered.
■Changing engine switch modes
Release the brake pedal and press the engine switch in step above.
The engine does not start an d modes will be changed each time the switch is pressed.
( P. 205)
■When the electronic key does not work properly
●Make sure that the smart entry & start system has not been deactivated in the
customization setting. If it is off, turn the function on.
(Customizable features: P. 641)
●Check if battery-saving mode is set. If it is set, cancel the function. (P. 142)
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
possibility of any passenger having any of their body parts caught in the window or
moon roof.
Also, do not allow children to operate the me chanical key. It is possible for children and
other passengers to get caught in the power window or moon roof.
3
Page 618 of 676
6188-2. Steps to take in an emergency
IS200t_EE(OM53D77E)
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, depending on the situa-
tion, the alarm may activate and doors
locked. (
P. 83)
Open the hood. ( P. 497)
If the vehicle battery is discharged
The following procedures may be used to start the engine if the vehicle’s bat-
tery is discharged.
You can also call any authorized Lexus retailer or Lexus authorized repairer,
or any reliable repairer.
1
2
Page 620 of 676

6208-2. Steps to take in an emergency
IS200t_EE(OM53D77E)
Once the vehicle’s engine has started, remove the jumper cables in the exact
reverse order from which they were connected.
Once the engine starts, have the vehicle inspected at any authorized Lexus
retailer or Lexus authorized repairer, or an y reliable repairer as soon as possible.
■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. (Vehicles with
a Stop & Start system: except when the engine is stopped by the Stop & Start system.)
●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 discharge gradually even when the vehicle is not
in use, due to natural discharge and the draining 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 unlock the doors using the smart entry & start
system when the battery is discharged. Us e the wireless remote control or the mechan-
ical 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.
●Vehicles with Stop & Start system:
For a while after the battery terminals have been disconnected or reconnected, for a
while after the battery has been replaced, the Stop & Start system may not automati-
cally stop the engine for approximately 5 to 60 minutes.
■When exchanging the battery (vehicles with Stop & Start system)
Use a battery specified for use with the Stop & Start system and equivalent to a genuine
battery. If an unsupported battery is used, Stop & Start system functions may be
restricted to protect the battery.
Also, battery performance may decrease and the engine may not be able to restart.
Contact any authorized Lexus retailers or Le xus authorized repairers, or any reliable
repairers.
7
Page 643 of 676
643
9
9-2. Customization
Vehicle specifications
IS200t_EE(OM53D77E)
■Door lock (
P. 128, 135, 615)
■Smart entry & start system and wireless remote control ( P. 128, 135)
FunctionDefault settingCustomized setting
Unlocking using a mechanical
keyAll doors unlocked
in one step
Driver’s door
unlocked in one step, all doors
unlocked in two steps
—O
Speed-detecting automatic door
lock functionOnOffOO
Shifting gears to position other
than P locks all doorsOffOnOO
Shifting gears to P unlocks all
doorsOffOnOO
Opening driver’s door unlocks all
doorsOnOffOO
Locking/unlocking of the trunk
when all doors are locked/
unlocked
OnOff—O
12
FunctionDefault settingCustomized setting
Operation signal
(Emergency flashers)OnOffOO
Time elapsed before automatic
door lock function is activated if
door is not opened after being
unlocked
30 seconds
60 seconds
—O120 seconds
Open door warning buzzerOnOff—O
Welcome light illumination con-
trolOnOff—O
12
Page 645 of 676
645
9
9-2. Customization
Vehicle specifications
IS200t_EE(OM53D77E)
■Outside rear view mirrors (
P. 173)
*: If equipped
■Power windows ( P. 177)
■Moon roof* ( P. 181)
*: If equipped
FunctionDefault settingCustomized setting
Automatic mirror folding and
extending operation*
Linked to the lock-
ing/unlocking of the
doorsOff
—OLinked to operation
of the engine switch
12
FunctionDefault settingCustomized setting
Mechanical key linked operationOffOn—O
Wireless remote control linked
operationOffOn—O
Wireless remote control linked
operation signal (buzzer)OnOff—O
12
FunctionDefault settingCustomized setting
Mechanical key linked operationOffOn—O
Linked operation of components
when mechanical key is used
(open only)Slide onlyTilt only—O
Wireless remote control linked
operationOffOn—O
Linked operation of components
when wireless remote control is
used (open only)Slide onlyTilt only—O
Wireless remote control linked
operation signal (buzzer)OnOff—O
12
Page 648 of 676
6489-2. Customization
IS200t_EE(OM53D77E)
■Illumination (P. 465)
FunctionDefault settingCustomized setting
Time elapsed before the interior
lights turn off15 seconds
Off
OO7.5 seconds
30 seconds
Operation after the engine
switch is turned offOnOff—O
Operation when the doors are
unlockedOnOff—O
Operation when you approach
the vehicle with the electronic
key on your person
OnOff—O
Inside door handle lightsOnOff—O
Time elapsed before the outer
foot lights turn off15 seconds
Off
OO7.5 seconds
30 seconds
Operation of the outer foot lights
when you approach the vehicle
with the electronic key on your
person
OnOff—O
Operation of the outer foot lights
when the doors are unlocked
with the power door lock switchOnOff—O
12
Page 652 of 676

652
IS200t_EE(OM53D77E)
What to do if... (Troubleshooting)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, new genuine mechanical keys can be made
by any authorized Lexus retailer or Le xus authorized repairer, or any reliable
repairer. ( P. 124)
●If you lose your electronic keys, the risk of vehicle theft increases significantly.
Contact any authorized Lexus retailer or Lexus authorized repairer, or any
reliable repairer immediately. ( P. 127)
●Is the electronic key battery weak or depleted? ( P. 527)
●Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. ( P. 205)
●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 due to the condition of the radio wave.
( P. 143)
●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. 132)
If you have a problem, check the following before contacting any authorized
Lexus retailer or Lexus authorized repairer, or any reliable repairer.
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
Page 653 of 676

653What to do if... (Troubleshooting)
IS200t_EE(OM53D77E)
●The function to prevent the electronic 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. 138)
●Did you press the engine switch while firmly depressing the brake pedal?
( P. 204)
●Is the shift lever in P? ( P. 206)
●Is the electronic key anywhere detectable inside the vehicle? ( P. 141)
●Is the steering wheel unlocked? ( P. 206)
●Is the electronic key battery weak or depleted?
In this case, the engine can be started in a temporary way. ( P. 616)
●Is the battery discharged? ( P. 618)
●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. 214)
●It is locked automatically to prevent theft of the vehicle. ( P. 206)
The trunk lid is closed with the electronic key left inside
If you think some
thing 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