Page 865 of 1014

8387-2. Steps to take in an emergency
GS450h_300h_OM_OM30D53E_(EE)
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 profes-
sional. 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 operate using more force than usual.
If the tire pressure warning light comes on
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.
Stop your vehicle in a safe place as soon as possible. Adjust the tire infla-
tion pressure immediately.
If the tire pressure warning light comes on even after tire inflation pres-
sure adjustment, 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 any authorized Lexus dealer or repairer, or another duly quali-
fied and equipped professional.
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.
NOTICE
Precaution when installing a different tire
When differently constructed tires or tires of different makers, models or
tread patterns are installed, the tire pressure warning system may not oper-
ate properly.
Page 887 of 1014
8607-2. Steps to take in an emergency
GS450h_300h_OM_OM30D53E_(EE)
(If equipped)
Indicates that the fuel
injectors require main-
tenance
Have any authorized
Lexus dealer or
repairer, or another
duly qualified and
equipped professional
replenish the injector
cleaner and reset the
message.
(If equipped)
Indicates that the tire
inflation pressure is
lowCheck the tire inflation
pressure, and adjust to
the appropriate level.
(If equipped)
Indicates a malfunc-
tion in the tire pressure
warning system
Stop the vehicle in a
safe place and turn the
power switch off then
on again.
If the tire pressure
warning indicator
flashes for 1 minute
then illuminates,
there is a malfunction
in the system. Have
the vehicle inspected
by any authorized
Lexus dealer or
repairer, or another
duly qualified and
equipped profes-
sional.
Wa r n i n g m e s s a g eDetailsCorrection procedure
Page 898 of 1014
8717-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30D53E_(EE)
If you have a flat tire (vehicles with a spare tire)
Stop the vehicle on a hard, flat surface.
Set the parking brake.
Shift the shift lever to P.
Stop the hybrid system.
Turn on the emergency flashers. (P. 820)
Remove the flat tire and replace it with the spare tire provided.
For details about tires: P. 754
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 900 of 1014

8737-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30D53E_(EE)
CAUTION
Using the tire jack
Observe the following precautions.
Improper use of the tire jack may cause the vehicle to suddenly fall off the
jack, leading to death or serious injury.
Do not use the tire jack for any purpose other than replacing tires or
installing and removing tire chains.
Only use the tire jack that comes with this vehicle for replacing a flat tire.
Do not use it on other vehicles, and do not use other tire jacks for replac-
ing tires on this vehicle.
Put the jack properly in its jack point.
Do not put any part of your body under the vehicle while it is supported
by the jack.
Do not start the hybrid system or drive the vehicle while the vehicle is
supported by the jack.
Do not raise the vehicle while someone is inside.
When raising the vehicle, do not put an object on or under the jack.
Do not raise the vehicle to a height greater than that required to replace the
tire.
Use a jack stand if it is necessary to get under the vehicle.
When lowering the vehicle, make sure that there is no-one near the vehi-
cle. If there are people nearby, warn them vocally before lowering.
Page 903 of 1014
8767-2. Steps to take in an emergency
GS450h_300h_OM_OM30D53E_(EE)
Chock the tires.
Slightly loosen the wheel nuts
(one turn).
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
2
Page 905 of 1014

8787-2. Steps to take in an emergency
GS450h_300h_OM_OM30D53E_(EE)
CAUTION
Replacing a flat tire
Do not touch the disc wheels or the area around the brakes immediately
after the vehicle has been driven.
After the vehicle has been driven the disc wheels and the area around the
brakes will be extremely hot. Touching these areas with hands, feet or
other body parts while changing a tire, etc. may result in burns.
Failure to follow these precautions could cause the wheel nuts to loosen
and the tire to fall off, resulting in death or serious injury.
• Never use oil or grease on the wheel bolts or wheel nuts.
Oil and grease may cause the wheel nuts to be excessively tightened,
leading to bolt or disc wheel damage. In addition, the oil or grease can
cause the wheel nuts to loosen and the wheel may fall off, causing a
serious accident. Remove any oil or grease from the wheel bolts or
wheel nuts.
• Have the wheel nuts tightened with a torque wrench to 103 N•m
(10.5 kgf•m, 76 ft•lbf) as soon as possible after changing wheels.
• When installing a tire, only use wheel nuts that have been specifically
designed for that wheel.
• If there are any cracks or deformations in the bolt screws, nut threads or
bolt holes of the wheel, have the vehicle inspected by any authorized
Lexus dealer or repairer, or another duly qualified and equipped profes-
sional.
Page 907 of 1014
8807-2. Steps to take in an emergency
GS450h_300h_OM_OM30D53E_(EE)
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.
4
5
Page 908 of 1014

8817-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30D53E_(EE)
The compact spare tire
The compact spare tire is identified by the label “TEMPORARY USE
ONLY” on the tire sidewall.
Use the compact spare tire temporarily, and only in an emergency.
Make sure to check the tire inflation pressure of the compact spare tire.
(P. 936)
When using the compact spare tire (vehicles with the tire pressure warning
system)
As the compact spare tire is not equipped with a tire pressure warning valve
and transmitter, low inflation pressure of the spare tire will not be indicated
by the tire pressure warning system. Also, if you replace the compact spare
tire after the tire pressure warning light comes on, the light remains on.
When the compact spare tire is equipped
The vehicle becomes lower when driving with the compact spare tire com-
pared to when driving with standard tires.
If you have a flat rear tire on a road covered with snow or ice (vehicles with
front and rear tires of the same size and compact spare tire only)
Install the compact spare tire on one of the front wheels of the vehicle. Per-
form the following steps and fit tire chains to the rear tires:
Replace a front tire with the compact spare tire.
Replace the flat rear tire with the tire removed from the front of the vehicle.
Fit tire chains to the rear tires.
1
2
3