
5
When trouble arises
537
5-2. Steps to take in an emergency
Follow the correction procedures.
After taking the specified steps to correct the suspected problem, check
that the warning light goes off.
Warning lightWarning light/DetailsCorrection procedure
Open door warning light
(warning buzzer)*1
Indicates that one or more of
the doors is not fully closed.
Check that all the doors are
closed.
Low fuel level warning light
Indicates remaining fuel is
approximately 2.8 gal. (10.7
L, 2.4 Imp. gal.) or less
Refuel the vehicle.
(On the instru-
ment panel)
Driver’s seat belt reminder
light (warning buzzer)*2
Warns the driver to fasten
his/her seat belt.
Fasten the seat belt.
(On the center
panel)
Front passenger’s seat belt
reminder light
(warning buzzer)*2
Warns the front passenger to
fasten his/her seat belt.
Fasten the seat belt.
Master warning light
A buzzer sounds and the
warning light comes on and
flashes to indicate that the
master warning system has
detected a malfunction.
→P. 5 4 5

538
5-2. Steps to take in an emergency
*1: Open door warning buzzer:
The open door warning buzzer sounds to alert one or more of the doors is not
fully closed (with the vehicle having reached a speed of 3 mph [5 km/h]).
( →P. 551)
*2: Driver's and front passenger’s seat belt buzzer:
The driver’s and front passenger’s seat belt buzzer sounds to alert the driver and
front passenger that his or her seat belt is not fastened. The buzzer sounds inter-
mittently for 10 seconds after the vehicle reaches a speed of 12 mph (20 km/h).
Then, if the seat belt is still unfastened, the buzzer will sound in a different tone
for 20 more seconds.
Tire pressure warning light
When the light comes on:
Low tire inflation pressure.
Adjust the tire inflation pres-
sure.
When the light comes on after
flashing for 1 minute:
Malfunction in the tire pres-
sure warning system.
Have the system checked by
your Lexus dealer.
Warning lightWarning light/DetailsCorrection procedure

5
When trouble arises
539
5-2. Steps to take in an emergency
nSRS warning light
This warning light system monitors the airbag sensor assembly, front airbag sensors,
side and curtain shield airbag sensors, curtain shield airbag sensors, driver's seat
position sensor, driver's seat belt buckle switch, front passenger occupant classifi-
cation system, “AIR BAG ON” indicator light, “AIR BAG OFF” indicator light, front
passenger's seat belt buckle switch, seat belt pretensioner assemblies, inflators,
interconnecting wiring and power sources. ( →P. 1 0 9 )
nFront passenger detection sensor, passenger seat belt reminder and warning
buzzer
lIf luggage is placed on the front passenger seat, the front 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.
lIf a cushion is placed on the seat, the sensor may not detect a passenger, and the
warning light may not operate properly.
nElectric power steering system warning light
When the voltage is low or drops, the power steering warning light may come on.
nIf the malfunction indicator lamp comes on while driving
First check the following:
lIs the fuel tank empty?
If it is, fill the fuel tank immediately.
lIs the fuel tank cap loose?
If it is, tighten it securely.
The lamp will go off after several driving trips.
If the light does not go off even after several trips, contact your Lexus dealer as soon
as possible.

5
When trouble arises
541
5-2. Steps to take in an emergency
nIf the tire pressure warning system is not functioning
The tire pressure warning system will be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
lIf tires not equipped with tire pressure warning valves and transmitters are used
lIf the ID code on the tire pressure warning valves and transmitters is not regis-
tered in the tire pressure warning computer
lIf the tire pressure warning select switch is set to a different tire setting.
lIf the tire inflation pressure is 73 psi (500 kPa, 5.1 kgf/cm2 or bar) or higher
The tire pressure warning system may be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
lIf electronic devices or facilities using similar radio wave frequencies are nearby
lIf a radio set at similar frequencies is in use in the vehicle
lIf a window tint that affects the radio wave signals is installed
lIf there is a lot of snow or ice on the vehicle, in particular around the wheels or
wheel housings
lIf non-genuine Lexus wheels are used (Even if you use Lexus wheels, the tire
pressure warning system may not work properly with some types of tires.)
lIf tire chains are used
lIf the full-size spare tire is in a location subject to poor radio wave signal recep-
tion.
lIf a large metallic object which can interfere with signal reception is put in the
luggage compartment (vehicles with full-size spare tire).
nIf the tire pressure warning light comes on after flashing frequently for 1 minute
If the tire pressure warning light comes on after flashing frequently for 1 minute
when the “ENGINE START STOP” switch is turned to IGNITION ON mode, have
it checked by your Lexus dealer.
nCustomization
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features →P. 6 2 1 )

586
5-2. Steps to take in an emergency
CAUTION
nAvoiding battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flammable
gas that may be emitted from the battery:
lMake sure each jumper cable is connected to the correct terminal.
lDo not allow the “+” and “-” terminals of the jumper cables to come into contact
with each other.
lDo not smoke, use matches, cigarette lighters or allow open flame near the bat-
tery.
nBattery precautions
The battery contains poisonous and corrosive acidic electrolyte, while related parts
contain lead and lead compounds. Observe the following precautions when han-
dling the battery:
lWhen working with the battery, always wear safety glasses and take care not to
allow any battery fluids (acid) to come into contact with skin, clothing or the vehi-
cle body.
lDo not lean over the battery.
lIn the event that battery fluid comes into contact with the skin or eyes, immedi-
ately wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medical attention can be
received.
lAlways wash your hands after handling the battery support, terminals, and other
battery-related parts.
lDo not allow children near the battery.
NOTICE
nWhen handling jumper cables
When connecting the jumper cables, ensure that they do not become entangled in
the cooling fans or belt.

588
5-2. Steps to take in an emergency
nOverheating
If you observe the following, your vehicle may be overheating:
lThe engine coolant temperature gauge enters the red zone or a loss of power is
experienced.
lSteam comes out from under the hood.
CAUTION
nTo prevent an accident or injury when inspecting under the hood of your vehicle
lIf steam is seen coming from under the hood, do not open the hood until the
steam has subsided. The engine compartment may be very hot, causing serious
injuries such as burns.
lKeep hands and clothing away from the fans and drive belt while the engine is
running.
lDo not loosen the radiator cap while the engine and radiator are hot.
Serious injury, such as burns, may result from hot coolant and steam released
under pressure.
Add engine coolant if neces-
sary.
Water can be used in an emer-
gency if engine coolant is
unavailable. ( →P. 599)
Have the vehicle inspected at the nearest Lexus dealer as soon as pos-
sible.
STEP6