2013 Lexus GS300h Owner's Manual

3824-5. Using the driving support system
GS450h_300h_OM_OM30D53E_(EE)
When the ground behind the vehicle slopes up sharply
The distance guide lines
will appear to be closer to
the vehicle than the actual
distance. Because of this,
objects will appear to be far-
ther away than they actually
are. In the same way, there
will be a margin of error
between the guidelines and
the actual distance/course
on the road.
When the ground behind the vehicle slopes down sharply
The distance guide lines
will appear to be further
from the vehicle than the
actual distance. Because of
this, objects will appear to
be closer than they actually
are. In the same way, there
will be a margin of error
between the guidelines and
the actual distance/course
on the road.

3834-5. Using the driving support system
4
Driving
GS450h_300h_OM_OM30D53E_(EE)
When any part of the vehicle sags
When any part of the vehi-
cle sags due to the number
of passengers or the distri-
bution of the load, there is a
margin of error between the
guide lines on the screen
and the actual distance/
course on the road.
When approaching three-dimensional objects
The estimated course lines target a flat surfaced objects (such as
the road). It is not possible to determine the position of three-
dimensional objects (such as vehicles) using the estimated course
lines and distance guide lines. When approaching a three-dimen-
sional object that extends outward (such as the flatbed of a
truck), be careful of the following.
Estimated course lines
Visually check the sur-
roundings and the area
behind the vehicle. In the
case shown in the illustra-
tion, the truck appears to be
outside of the estimated
course lines and the vehicle
does not look as if it hits the
truck. However, the rear
body of the truck may actu-
ally cross over the estimated
course lines. In reality if
you back up as guided by
the estimated course lines,
the vehicle may hit the
truck.
A margin of error

3844-5. Using the driving support system
GS450h_300h_OM_OM30D53E_(EE)
Distance guidelines
Visually check the sur-
roundings and the area
behind the vehicle. On the
screen, it appears that a
truck is parking at point .
However, in reality if you
back up to point , you
will hit the truck. On the
screen, it appears that is
closest and is farthest
away. However, in reality,
the distance to and is
the same and is farther
than and .
2
1
1
3
13
2
13

3854-5. Using the driving support system
4
Driving
GS450h_300h_OM_OM30D53E_(EE)
If you think something is wrong
If you notice any of the following symptoms, refer to the likely
cause and the solution, and re-check.
If the symptom is not resolved by the solution, have the vehicle
inspected by any authorized Lexus dealer or repairer, or another
duly qualified and equipped professional.
Things you should know
SymptomLikely causeSolution
The image is difficult
to see
• The vehicle is in a
dark area
• The temperature
around the lens is
either high or low
• The outside tempera-
ture is low
• There are water drop-
lets on the camera
• It is raining or humid
• Foreign matter (mud
etc.) is adhering to
the camera
• There are scratches
on the camera
• Sunlight or head-
lights are shining
directly into the cam-
era
• The vehicle is under
fluorescent lights,
sodium lights, mer-
cury lights etc.
If this happens due to
these causes, it does
not indicate a malfunc-
tion.
Back up while visually
checking the vehicle’s
surroundings. (Use the
monitor again once
conditions have been
improved.)
To adjust the image on
the parking assist mon-
itor screen. (P. 4 4 6 )

3864-5. Using the driving support system
GS450h_300h_OM_OM30D53E_(EE)
The image is blurry
Dirt or foreign matter
(such as water droplets,
snow, mud etc.) is
adhering to the camera.Rinse the camera lens
with water and wipe it
clean with a soft cloth.
Wash with a mild soap
if the dirt is stubborn.
The image is out of
alignment
The camera or sur-
rounding area has
received a strong
impact.
Have the vehicle
inspected by any
authorized Lexus
dealer or repairer, or
another duly qualified
and equipped profes-
sional.
The guide lines are
very far out of align-
ment
The camera position is
out of alignment.
Have the vehicle
inspected by any
authorized Lexus
dealer or repairer, or
another duly qualified
and equipped profes-
sional.
• The vehicle is tilted
(there is a heavy load
on the vehicle, tire
pressure is low due to
a tire puncture, etc.)
• The vehicle is used
on an incline.If this happens due to
these causes, it does
not indicate a malfunc-
tion.
Back up while visually
checking the vehicle’s
surroundings.
The estimated course
lines move even
though the steering
wheel is straightThere is a malfunction
in the signals being
output by the steering
sensor.
Have the vehicle
inspected by any
authorized Lexus
dealer or repairer, or
another duly qualified
and equipped profes-
sional.
SymptomLikely causeSolution

3874-5. Using the driving support system
4
Driving
GS450h_300h_OM_OM30D53E_(EE)
Guide lines are not dis-
playedThe trunk lid is open.
Close the trunk lid.
If this does not resolve
the symptom, have the
vehicle inspected by
any authorized Lexus
dealer or repairer, or
another duly qualified
and equipped profes-
sional.
“System is initializ-
ing.” is displayed
• The 12-volt battery
has been reinstalled.
• The steering wheel
has been moved
while the 12-volt bat-
tery was being rein-
stalled.
• 12-volt battery power
is low.
• The steering sensor
has been reinstalled.
• There is a malfunc-
tion in the signals
being output by the
steering sensor.
Stop the vehicle, and
turn the steering wheel
as far as it will go to
the left and right.
If this does not resolve
the symptom, have the
vehicle inspected by
any authorized Lexus
dealer or repairer, or
another duly qualified
and equipped profes-
sional.
• On the system initial-
ization screen, select
the “?” button to dis-
play the operating
procedure.
SymptomLikely causeSolution

3884-5. Using the driving support system
GS450h_300h_OM_OM30D53E_(EE)
CAUTION
When using the Lexus parking assist monitor system
The Lexus parking assist monitor is a supplemental device intended to
assist the driver when backing up. When backing up, be sure to check visu-
ally behind and all around the vehicle before proceeding.
Observe the following precautions to avoid an accident that could result in
death or serious injuries.
Never depend on the Lexus parking assist monitor entirely when backing
up. The image and the position of the guide lines displayed on the screen
may differ from the actual state.
Use caution, just as you would when backing up any vehicle.
Be sure to back up slowly, depressing the brake pedal to control vehicle
speed.
If you seem likely to hit nearby vehicles, obstacles, people or mount the
shoulder, depress the brake pedal to stop the vehicle, then disable the
assist system by select on the screen to cancel the system.
The instructions given are only guidelines.
When and how much to turn the steering wheel will vary according to
traffic conditions, road surface conditions, vehicle condition, etc. when
parking. It is necessary to be fully aware of this before using the parking
assist system.
When parking, be sure to check that the parking space will accommodate
your vehicle before maneuvering into it.
Do not use the Lexus parking assist monitor in the following cases:
• On icy or slick road surfaces, or in snow
• When using tire chains or emergency tires
• When the trunk lid is not closed completely
• On roads that are not flat or straight, such as curves or slopes.

3894-5. Using the driving support system
4
Driving
GS450h_300h_OM_OM30D53E_(EE)
CAUTION
In low temperatures, the screen may darken or the image may become
faint. The image could distort when the vehicle is moving, or you may
become unable to see the image on the screen. Be sure to check direct
visually and with mirror all around the vehicle before proceeding.
If the tire sizes are changed, the position of the guide lines displayed on
the screen may change.
The camera uses a special lens. The distances between objects and pedes-
trians that appear in the image displayed on the screen will differ from the
actual distances. (P. 381)
When using the perpendicular parking assist screen
Estimated course line display mode: If the steering wheel is straight and the
vehicle width extension guide lines and the estimated course lines are not in
alignment, have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
When using the parallel parking assist screen
Do not use the system if the display is incorrect due to an uneven (curvy/
hilly) road or a non-straight road.
Make sure to operate the steering wheel only when the vehicle is stopped.
Be sure to check that there are no obstacles inside the blue outline.
If there are any obstacles inside the blue outline, do not use the parallel
parking assist.
When positioning the blue outline over the parking space, be sure to posi-
tion it so that the extended blue line may not cross the tire of the vehicle
parked in front of the empty space.