Page 613 of 676

6138-2. Steps to take in an emergency
8
When trouble arises
IS200t_EE(OM53D77E)
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 following correct starting procedures.
( P. 204)
●There may be a malfunction in the engine immobilizer system.
( P. 75)
One of the following may be the cause of the problem:
●The battery terminal connections may be loose or corroded.
●The battery may be discharged. ( P. 618)
The engine starting system may be malfunctioning due to an electrical problem
such as electronic key battery depletion or a blown fuse. However, an interim
measure is available to start the engine. ( P. 614)
If the engine will not start
If the engine will not start even though correct starting procedures are being
followed ( P. 204), consider each of the following points:
The engine will not start even though the starter motor operates nor-
mally.
The starter motor turns over slowly, the interior lights and headlights
are dim, or the horn does not so und or sounds at a low volume.
The starter motor does not turn over
Page 614 of 676

6148-2. Steps to take in an emergency
IS200t_EE(OM53D77E)
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. 618)
●There may be a malfunction in the steering lock system.
Contact any authorized Lexus retailer or Le xus authorized repairer, or any reliable
repairer if the problem cannot be repaired , or if repair procedures are unknown.
When the engine does not start, the following steps can be used as an interim
measure to start the engine if the engine switch is functioning normally:
Set the parking brake.
Shift the shift lever to P.
Turn the engine switch to ACCESSORY mode.
Press and hold the engine switch for about 15 seconds while depressing the
brake pedal firmly.
Even if the engine can be started using the above steps, the system may be mal-
functioning. Have the vehicle inspected by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer.
The starter motor does not turn over , the interior lights and headlights
do not turn on, or the horn does not sound.
Emergency start function
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Page 615 of 676
6158-2. Steps to take in an emergency
8
When trouble arises
IS200t_EE(OM53D77E)
■Doors
Use the mechanical key (P. 123)
in order to perform the following
operations:
Locks all the doors
Closes the windows and moon
roof (turn and hold)
*
Unlocks all the doors
Opens the windows and moon
roof (turn and hold)
*
*
: This setting must be customized at any authorized Lexus retailer or Lexus autho- rized repairer, or any reliable repairer.
■Trunk
Turn the mechanical key clockwise
to open.
If the electronic key does not operate properly
If communication between the electronic key and vehicle is interrupted ( P.
143) or the electronic key cannot be used because the battery is depleted,
the smart entry & start system and wireless remote control cannot be used. In
such 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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Page 616 of 676
6168-2. Steps to take in an emergency
IS200t_EE(OM53D77E)
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.
When the electronic key is detected, a
buzzer sounds and the engine switch
will turn to IGNITION ON mode.
When the smart entry & start system is
deactivated in customization 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 any authorized Lexus
retailer or Lexus authorized repairer, or any reliable repairer.
Starting the engine
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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.
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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.
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Page 619 of 676

6198-2. Steps to take in an emergency
8
When trouble arises
IS200t_EE(OM53D77E)
Connect the jumper cables according to the following procedure:
Left-hand drive vehicles
Right-hand drive vehicles Connect a positive jumper cable clamp to the positive (+) battery terminal
on your vehicle.
Connect the clamp on the other end of the positive cable to the positive (+)
battery terminal on the second vehicle.
Connect a negative cable clamp to the negative (-) battery terminal on the
second vehicle.
Connect the clamp at the other end of the negative cable to a solid, station-
ary, unpainted metallic point away from the battery and any moving parts,
as shown in the illustration.
Start the engine of the second vehicle. Increase the engine speed slightly and
maintain at that level for approximately 5 minutes to recharge the battery of
your vehicle.
Open and close any of the doors of your vehicle with the engine switch off.
Maintain the engine speed of the second vehicle and start the engine of your
vehicle by turning the engine switch to IGNITION ON mode.
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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.
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