battery Lexus GS300h 2013 Owner's Guide

2564-2. Driving procedures
GS450h_300h_OM_OM30D53E_(EE)
Switching to EV drive mode when the gasoline engine is cold
If the hybrid system is started while the gasoline engine is cold, the gasoline
engine will start automatically in order to warm up. In this case, you will
become unable to switch to EV drive mode.
Automatic cancelation of EV drive mode
When driving in EV drive mode, the gasoline engine may automatically
restart in the following situations. When EV drive mode is canceled, a buzzer
will sound and the EV drive mode indicator will flash and go off.
The hybrid battery (traction battery) becomes low.
The remaining battery level indicated in the “Energy monitor” display is
low.
(P. 131)
GS450h: Vehicle speed becomes more than about 40 km/h (25 mph).
GS300h: Vehicle speed becomes more than about 45 km/h (28 mph).
The accelerator pedal is depressed firmly or the vehicle is on a hill etc.
When it is possible to inform the driver of automatic cancelation in advance,
a prior notice screen will appear on the multi-information display.
Possible driving distance when driving in EV drive mode
EV drive mode’s possible driving distance ranges from a few hundred meters
to approximately 1 km (0.6 mile). Driving is possible at speeds of less than
approximately 40 km/h (25 mph) for GS450h or 45 km/h (28 mph) for
GS300h. However, depending on vehicle conditions, there are situations
when EV drive mode cannot be used.
(The distance that is possible depends on the hybrid battery [traction battery]
level and driving conditions.)
Fuel economy
Your Lexus is designed to achieve the best possible fuel economy during nor-
mal driving (using the gasoline engine and electric motor [traction motor]).
Driving in EV drive mode more than necessary may lower fuel economy. To prevent gasoline engine warm up in
order to reduce noises, start the hybrid
system without starting the gasoline
engine, pressing the power switch with
fully depressing the brake pedal and
pressing the EV drive mode switch.

2664-2. Driving procedures
GS450h_300h_OM_OM30D53E_(EE)
CAUTION
When driving on slippery road surfaces
Be careful of downshifting and sudden acceleration, as this could result in
the vehicle skidding to the side or spinning.
NOTICE
Hybrid battery (traction battery) charge
If the shift lever is in N, the hybrid battery (traction battery) will not be
charged even when the engine is running. Therefore, if the vehicle is left
with the shift lever in N for a long period of time, the hybrid battery (trac-
tion battery) will discharge, and this may result in the vehicle not being able
to start.

2764-3. Operating the lights and wipers
GS450h_300h_OM_OM30D53E_(EE)
If the “AFS OFF” indicator flashes
It may indicate a malfunction in the system. Contact any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
Customization
Settings (e.g. light sensor sensitivity) can be changed.
(Customizable features: P. 949)
NOTICE
To prevent 12-volt battery discharge
Do not leave the lights on longer than necessary when the hybrid system is
off.

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

4024-5. Using the driving support system
GS450h_300h_OM_OM30D53E_(EE)
When the message is displayed on the multi-information display showing that
TRC has been disabled even if the VSC OFF switch has not been pressed
TRC cannot be operated. Contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
VGRS is disabled when
VGRS may stop operating in the following situations.
In this event, the steering wheel may move from its straight forward position,
but it will return when the system restarts.
The steering wheel is operated for an extended period of time while the
vehicle is stopped or is moving very slowly.
When force is continuously applied for a long time with the steering wheel
turned as far as it will go.
The center position of the steering wheel may change when VGRS is dis-
abled. However, the position will return to normal after VGRS is reacti-
vated.
When the 12-volt battery is disconnected
The steering wheel may move from its straight forward position, but this will
be corrected automatically when driving.
Sounds and vibrations caused by the ABS, brake assist, VSC, TRC and
VGRS systems
A sound may be heard from the engine compartment when the brake pedal
is depressed repeatedly, when the hybrid system is started or just after the
vehicle begins to move. This sound does not indicate that a malfunction has
occurred in any of these systems.
Any of the following conditions may occur when the above systems are
operating. None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard after the vehicle comes to a stop.
EPS, VGRS and DRS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be
heard. This does not indicate a malfunction.
Reactivation of the TRC/VSC systems
Even after the TRC/VSC systems have been turned off, turning the hybrid
system off and then on again will automatically reactivate the TRC/VSC sys-
tems.

4354-5. Using the driving support system
4
Driving
GS450h_300h_OM_OM30D53E_(EE)
Before using the Lexus night view
Never depend on this system only.
Lexus night view is intended as a supplemental aid to help you see pedestri-
ans and road conditions ahead of the vehicle. As there are limits to the sys-
tem, do not rely solely on the system while in use, and drive safely while
observing the following precautions.
When using the Lexus night view
Observe the following precautions.
Failure to do so may cause an accident resulting in death or serious injury.
Never drive while looking at the Lexus night view screen only.
Do not look continuously at the Lexus night view screen while driving.
Pedestrians, objects etc. ahead of the vehicle may be overlooked by the
system. The system should always be used as a supplemental aid only.
Lexus night view is designed to help you see objects better when driving
in darkness on a road with few curves. Do not use the Lexus night view in
well-lit areas or on roads with many curves or slopes. There may be areas
that cannot be displayed by the system due to the road conditions (curve
size, gradient, etc.)
Lexus night view may be unable to project some features at an appropriate
level of brightness. Some or all parts of certain features may be dark or
difficult to see. Do not rely solely on the Lexus night view, and drive care-
fully while checking the surroundings for safety, as you would with a nor-
mal vehicle. Also, the following features and conditions may not be
displayed clearly.
Features that are difficult to display:
• Clothing of a pedestrian made of a certain kind of material (ex. leather
jackets)
• The characters on signs and billboards
• The information on road signs
Conditions in which display is difficult:
• Unfavorable weather conditions such as rain, fog, snowfall, snow
storms etc.
• There are large puddles of water on the road surface following rainfall
• The area of the front windshield in front of the camera is fogged up,
dirty or icy
• The areas around the headlights are covered with ice, snow, mud etc.
• The 12-volt battery voltage is remarkably low
• There are bright lights ahead of the vehicle

4344-6. Driving tips
GS450h_300h_OM_OM30D53E_(EE)
Winter driving tips
Use fluids that are appropriate to the prevailing outside tempera-
tures.
• Engine oil
• Engine/power control unit coolant
• Washer fluid
Have a service technician inspect the condition of the 12-volt
battery.
Have the vehicle fitted with four snow tires or purchase a set of
tire chains for the rear tires.
*
Ensure that all tires are the specified size and brand, and that chains
match the size of the tires.
*: Tire chains cannot be mounted on vehicles with front and rear tires of
differing sizes and vehicles with LDH and 19 inch tires
Carry out the necessary preparations and inspections before driv-
ing the vehicle in winter. Always drive the vehicle in a manner
appropriate to the prevailing weather conditions.
Preparation for winter

4955-2. Using the air conditioning system and defogger
5
Interior features
GS450h_300h_OM_OM30D53E_(EE)
CAUTION
To prevent the windshield from fogging up
Do not use
during cool air operation in extremely humid weather.
The difference between the temperature of the outside air and that of the
windshield can cause the outer surface of the windshield to fog up, block-
ing your vision.
nanoe generator
Do not disassemble or repair the generator because it contains high voltage
parts. Contact any authorized Lexus dealer or repairer, or another duly
qualified and equipped professional if the generator needs repair.
NOTICE
To prevent 12-volt battery discharge
Do not leave the air conditioning system on longer than necessary when the
hybrid system is off.
Humidity sensor
Follow these points to avoid damaging the sensor:
Do not disassemble the sensor
Do not spray the glass cleaner on the sensor or subject it to strong impacts
Do not stick anything on the sensor
To prevent damage to the nanoe
Do not insert anything into the driver’s side vent, attach anything to it, or
use sprays around the driver’s side vent. These things may cause the gener-
ator not to work properly.

5005-2. Using the air conditioning system and defogger
GS450h_300h_OM_OM30D53E_(EE)
Button lock function
Rear control panel illumination off function To prevent inadvertent operation, the but-
tons on the rear armrest can be locked.
Press until you hear a beep to lock
the buttons. Pressing again until
you hear a beep will release the lock.
The indicator appears on the display
when the buttons are locked.
Control panel illumination on the rear
armrest can be turned off. Press
until you hear a beep to turn the illumina-
tion off. Pressing again until you
hear a beep will turn the illumination on.
NOTICE
To prevent 12-volt battery discharge
Do not leave the air conditioning system on longer than necessary when the
hybrid system is off.

5015-2. Using the air conditioning system and defogger
5
Interior features
GS450h_300h_OM_OM30D53E_(EE)
Rear window and outside rear view mirror
defoggers
On/off
The defoggers will automatically
turn off after 15 to 60 minutes. The
operation time changes according
to the ambient temperature and
vehicle speed.
Operating conditions
The power switch must be in the ON mode.
These features are used to defog the rear window, and to remove
raindrops, dew and frost from the outside rear view mirrors.
CAUTION
When the outside rear view mirror defoggers are on
Do not touch the rear view mirror surfaces, as they can become very hot
and burn you.
NOTICE
To prevent 12-volt battery discharge
Turn the defoggers off when the hybrid system is off.