Page 465 of 588

465
8When trouble arises
IS250_EE(OM53C51E)
8-1. Essential information
Emergency flashers...................466
If your vehicle has to
be stopped in an
emergency ................................. 4678-2. Steps to take in an
emergency
If your vehicle needs to
be towed .....................................468
If you think something is
wrong ............................................ 474
Fuel pump shut off system .......475
If a warning light turns
on or a warning buzzer
sounds........................................... 476
If a warning message is
displayed..................................... 482
If you have a flat tire
(vehicles with a
spare tire) ................................... 496
If you have a flat tire
(vehicles without a
spare tire) ................................... 507
If the engine will not start ..........521
If the shift lever cannot be
shifted from P............................ 523
If the electronic key does
not operate properly ............. 524
If the vehicle battery is
discharged ..................................527
If your vehicle overheats .......... 531
If the vehicle becomes
stuck ............................................. 534
Page 479 of 588

4798-2. Steps to take in an emergency
8
When trouble arises
IS250_EE(OM53C51E)
*3: Seat belt warning buzzer:
The seat belt warning buzzer sounds to alert the driver, front passenger and rear pas-
sengers that his or her seat belt is not fastened. The buzzer sounds for 30 seconds
after the vehicle reaches a speed of 20 km/h (12 mph). Then, if the seat belt is still
unfastened, the buzzer will sound in a different tone for 90 more seconds.
■Passenger detection sensor, seat belt reminder and warning buzzer
●If luggage is placed on a passenger seat, the passenger detection sensor may cause the
warning light to flash and the warning buzzer to sound even if a passenger is not sitting
in the seat.
●If a cushion is placed on the seat, the sensor may not detect a passenger, and the warn-
ing light may not operate properly.
■If the malfunction indicator lamp comes on while driving
The malfunction indicator lamp will come on if the fuel tank becomes completely empty.
If the fuel tank is empty, refuel the vehicle immediately. The malfunction indicator lamp
will go off after several trips.
If the malfunction indicator lamp does not go off, contact any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional as soon as possible.
■Electric power steering system warning light (warning buzzer)
When the battery charge becomes insufficient of the voltage temporarily drops, the
electric power steering system warning light may come on and the warning buzzer may
sound.
■When the tire pressure warning light comes on (if equipped)
Carry out the following procedure after the tire temperature has lowered sufficiently.
●Check the tire inflation pressure and adjust to the appropriate level.
●If the warning light does not go out even after several minutes, check that the tire infla-
tion pressure is at the specified level and carry out initialization.
The warning light may come on again if the above operations are conducted without first
allowing the tire temperature to lower sufficiently.
■The tire pressure warning light may come on due to natural causes (if equipped)
The tire pressure warning light may come on due to natural causes such as natural air
leaks and tire inflation pressure changes caused by temperature. In this case, adjusting
the tire inflation pressure will turn off the warning light (after a few minutes).
■When a tire is replaced with the spare tire (if equipped)
The compact spare tire is not equipped with a tire pressure warning valve and transmit-
ter. If a tire goes flat, the tire pressure warning light will not turn off even though the flat
tire has been replaced with the spare tire.
■Conditions that the tire pressure warning system may not function properly (if
equipped)
→P. 4 3 1
Page 480 of 588

4808-2. Steps to take in an emergency
IS250_EE(OM53C51E)
■If the tire pressure warning light frequently comes on after blinking for 1 minute (if
equipped)
If the tire pressure warning light frequently comes on after blinking for 1 minute when the
engine switch is turned to IGNITION ON mode, have it checked by any authorized
Lexus dealer or repairer, or another duly qualified and equipped professional.
■Warning buzzer
In some cases, the buzzer may not be heard due to being in a noisy location or audio
sound.
CAUTION
■If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact any authorized Lexus dealer
or repairer, or another duly qualified and equipped professional. The vehicle will
become extremely unstable during braking, and the ABS system may fail, which could
cause an accident resulting in death or serious injury.
■When the electric power steering system warning light comes on
The steering wheel may become extremely heavy.
If the steering wheel becomes heavier than usual when operating, hold firmly and oper-
ate using more force than usual.
■If the tire pressure warning light comes on (if equipped)
Be sure to observe the following precautions. Failure to do so could cause a loss of
vehicle control and result in death or serious injury.
XVehicles with a compact spare tire
●Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pressure
immediately.
●If the tire pressure warning light comes on even after tire inflation pressure adjust-
ment, it is probable that you have a flat tire. Check the tires. If a tire is flat, change it
with the spare tire and have the flat tire repaired by the nearest authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose
control of the steering wheel or the brakes.
XVehicles with an emergency tire puncture repair kit
●Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pressure
immediately.
●If the tire pressure warning light comes on even after tire inflation pressure adjust-
ment, it is probable that you have a flat tire. Check the tires. If a tire is flat, repair the
flat tire by using emergency tire puncture repair kit.
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose
control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.
Page 496 of 588
4968-2. Steps to take in an emergency
IS250_EE(OM53C51E)
●Stop the vehicle on a hard, flat surface.
●Set the parking brake.
●Shift the shift lever to P.
●Stop the engine.
●Turn on the emergency flashers. (→P. 466)
If you have a flat tire (vehicles with a spare tire)
Your vehicle is equipped with a spare tire. The flat tire can be replaced with
the spare tire.
For details about tires: →P. 4 2 7
CAUTION
■If you have a flat tire
Do not continue driving with a flat tire.
Driving even a short distance with a flat tire can damage the tire and the wheel beyond
repair, which could result in an accident.
Before jacking up the vehicle
Page 497 of 588
4978-2. Steps to take in an emergency
8
When trouble arises
IS250_EE(OM53C51E)
Location of the spare tire, jack and tools
Jack handle
Screwdriver
Wheel nut wrenchTowing eyelet
Spare tire
Jack1
2
3
4
5
6
Page 499 of 588
4998-2. Steps to take in an emergency
8
When trouble arises
IS250_EE(OM53C51E)
Remove the luggage mat.
Take out the jack handle from the
reverse side of the luggage mat.
Remove the spacer.
Take out the jack.
For tightening
For loosening
If the jack is too tightly installed to be
removed by hand, insert a tool, such
as the screwdriver included with the
vehicle, into the hole of the jack (por-
tion “A”) and loosen the jack.
Remove the luggage mat.
Remove the spacer and tool tray.
Taking out the jack and jack handle
1
2
3
1
2
Taking out the spare tire
1
2
Page 500 of 588
5008-2. Steps to take in an emergency
IS250_EE(OM53C51E)
Loosen the center fastener that
secures the spare tire.
If the center fastener cannot be turned
by hand, use the wheel nut wrench that
is stored in the trunk. (To secure the tire,
tighten the center fastener by hand. Do
not use the wrench or other tools.)
Chock the tires.
3
CAUTION
■When storing the spare tire
Be careful not to catch fingers or other body parts between the spare tire and the body
of the vehicle.
Replacing a flat tire
1
Flat tireWheel chock positions
FrontLeft-hand sideBehind the rear right-hand side tire
Right-hand sideBehind the rear left-hand side tire
RearLeft-hand sideIn front of the front right-hand side tire
Right-hand sideIn front of the front left-hand side tire
Page 503 of 588
5038-2. Steps to take in an emergency
8
When trouble arises
IS250_EE(OM53C51E)
Remove any dirt or foreign matter
from the wheel contact surface.
If foreign matter is on the wheel contact
surface, the wheel nuts may loosen
while the vehicle is in motion, causing
the tire to come off.
Install the tire and loosely tighten each wheel nut by hand by approximately
the same amount.
When replacing an aluminum wheel
with a steel wheel, tighten the wheel
nuts until the tapered portion comes
into loose contact with the disc
wheel seat.
Lower the vehicle.
Firmly tighten each wheel nut two or
three times in the order shown in the
illustration.
Tightening torque:
103 N•m (10.5 kgf•m, 76 ft•lbf)
Stow the flat tire, tire jack and all tools.
Installing the spare tire
1
2
Disc wheel
seat
Tapered portion
3
4
5