2974-5. Using the driving support systems
LS500_OM_(U)_1810 4
Driving of the following situations: ●
Shift the shift position to P or N●
The accelerator pedal is depressed●
The parking brake is engaged●
2 seconds at maximum elapsed after the
brake pedal is released■
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. ●
When the steering wheel is operated for
an extended period of time while the
vehicle is stopped or is moving very
slowly (on vehicles with LDH, DRS is dis-
abled together with VGRS)●
When the steering wheel has been held
fully to the left or right
The center position of the steering wheel
may change when VGRS is disabled. How-
ever, the position will return to normal after
VGRS is reactivated. ■
When the battery is disconnected (vehi-
cles with VGRS)
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, VS C, TRAC, hill-start
assist control and VGRS systems●
A sound may be heard from the engine
compartment when the brake pedal is
depressed repeatedly, when the engine 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 oper-
ating. None of these indicates that a mal-
function has occurred.
• Vibrations may be felt through the vehicle
body and steering.
• A motor sound may be heard also after
the vehicle comes to a stop.
• Vehicles without Lexus Safety System +
A: The brake pedal may pulsate slightly after the ABS is activated.
• Vehicles without Lexus Safety System +
A: The brake pedal may move down
slightly after the ABS is activated.■
ECB operating sound
ECB operating sound may be heard in the
following cases, but it does not indicate that
a malfunction has occurred. ●
Operating sound heard from the engine
compartment when the brake pedal is
operated. ●
Motor sound of the brake system heard
from the front part of the vehicle when
the driver’s door is opened. ●
Operating sound heard from the engine
compartment when one or two minutes
passed after the stop of the engine. ■
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. ■
Automatic reactivation of TRAC and
VSC systems
After turning the TRAC and VSC systems
off, the systems will be automatically
re-enabled in the following situations: ●
When the engine switch is turned off ●
If only the TRAC system is turned off, the
TRAC will turn on when vehicle speed
increases
If both the TRAC and VSC systems are
turned off, automatic re-enabling will not
occur when vehicle speed increases. ■
Reduced effectiveness of the EPS sys-
tem
The effectiveness of the EPS system is
reduced to prevent the system from over-
heating when there is frequent steering
input over an extended period of time. The
steering wheel may feel heavy as a result.
Should this occur, re frain from excessive
steering input or stop the vehicle and turn
the engine off. The EPS system should
return to normal within 10 minutes.
■
Secondary Collision Brake operating
conditions
The vehicle speed is approximately 6 mph
2994-5. Using the driving support systems
LS500_OM_(U)_1810 4
Driving WARNING■
Secondary Collision Brake
Do not overly rely on the Secondary Col-
lision Brake. This system is designed to
help reduce the possibility of further
damage due to a secondary collision,
however, that effect changes according
to various conditions. Overly relying on
the system may result in death or serious
injury. ■
Replacing tires
Make sure that all ti res are of the speci-
fied size, brand, tread pattern and total
load capacity. In addition, make sure that
the tires are inflated to the recom-
mended tire inflation pressure level.
The ABS, TRAC and VSC systems will
not function correctly if different tires are
installed on the vehicle.
Contact your Lexus dealer for further
information when replacing tires or
wheels. ■
Handling of tires and the suspension
Using tires with any kind of problem or
modifying the suspension will affect the
driving assist systems, and may cause a
system to malfunction.
300 4-6. Driving tips
LS500_OM_(U)_1810 4-6.Driving tips
Use fluids that are appropriate to
the prevailing outside temperatures. •Engine oil
• Engine coolant
•Washer fluid
Have a service technician inspect
the condition of the 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 vehi-
cles with front and rear tires of differing
sizes.Winter driving tips Carry out the necessary prepara-
tions and inspections before driving
the vehicle in winter. Always drive
the vehicle in a manner appropriate
to the prevailing weather condi-
tions.
Preparation for winter
WARNING
■
Driving with snow tires
Observe the following precautions to
reduce the risk of accidents.
Failure to do so may result in a loss of
vehicle control and cause death or seri-
ous injury.
●
Use tires of the specified size.
●
Maintain the recommended level of air
pressure. ●
Do not drive in excess of 75 mph (120
km/h), regardless of the type of snow
tires being used. ●
Use snow tires on all, not just some
wheels. ■
When installing tire chains
Before installing tire chains, make sure to
disable all functions of the vehicle height
control of the electronically modulated
air suspension. Otherwise, the vehicle
height may change while installing the
tire chains and part or your body may be
caught under the vehicle, possibly caus-
ing injury. ( P.293)■
Driving with tire chains
Observe the following precautions to
reduce the risk of accidents.
Failure to do so may result in the vehicle
being unable to be driven safely, and may
cause death or serious injury. ●
Do not drive in excess of the speed
limit specified for the tire chains being
used, or 30 mph (50 km/h), which-
ever is lower. ●
Avoid driving on bumpy road surfaces
or over potholes. ●
Avoid sudden acceleration, abrupt
steering, sudden br aking and shifting
operations that cause sudden engine
braking.
●
Slow down sufficiently before entering
a curve to ensure that vehicle control is
maintained.
●
Do not use LTA (Lane Tracing Assist)
system.
326 5-3. Using the air conditioning system and defogger
LS500_OM_(U)_1810 Adjust the temperature setting of each
rear seat using the Center Display or Rear
Multi Operation Panel.
Adjust the temperature setting of
each rear seat using the Center Dis-
play (rear air conditioning control
screen) or Rear Multi Operation
Panel. The temperature setting of each rear seat
can be changed independently.
■
Rear center outlets and rear side
outlets
1 Direct air flow to the left or right, up
or down
2 Turn the knob to open or close the
vent *
: If equipped
Air outlet layout and operations
NOTICE
■
To prevent battery discharge
Do not leave the air conditioning system
on longer than necessary when the
engine is off. Heated steering wheel *
/seat
heaters *
/seat ventilators *
Heated steering wheel
Warms up the grip of the steering
wheel
Front seat heaters/Rear seat
heaters
Warm up the seat upholstery
Front seat ventilators/Rear seat
ventilators
Maintain good ventilation by pulling
air through the seat upholstery
The Center Display and Rear Multi
Operation Panel/rear control
panel can be used to operate the
heated steering wheel, seat heaters
and seat ventilators as follows:
328 5-3. Using the air conditioning system and defogger
LS500_OM_(U)_1810 Adjust the seat ventilator fan speed
levelThe seat ventilator can be adjusted in 3 lev-
els. (Low, Mid or Hi)
Adjust the seat heater temperature
levelThe seat heater can be adjusted in 3 levels.
(Low, Mid or Hi)
Adjust the heated steering wheel
temperature level *
The heated steering wheel can be adjusted
in 2 levels. (Low or Hi)
Automatic mode on/off indicatorsWhen the automatic mode is on, the indi-
cator illuminates on the screen.
Sub function menu When the sub function button on the
Remote Touch is pressed, the following
functions can be set to automatic mode.
: Left-hand side seat heater/seat
ventilator
: Heated steering wheel *
: Right-hand side seat heater/seat
ventilator *
: Available on the front seat control
screen only
Side screen
Display the air conditioning control
screen: P.319
Adjust the front seat heater tem-
perature level Each time the switch is selected, the tem-
perature level and level indicator (orange)
change as follows:
AUTO Hi Mid Lo OFF
Adjust the front seat ventilator fan
speed level Each time the switch is selected, the fan
speed level and level indicator (blue)
change as follows:
AUTO Hi Mid Lo OFF
Adjust the heated steering wheel
temperature level Each time the switch is selected, the tem-
perature level and le vel indicator change
as follows:
AUTO Hi Lo OFFA
B
C
D
E A
B
C
D
3295-3. Using the air conditio ning system and defogger
LS500_OM_(U)_1810 5
Interior features ■
Rear Multi Operation Panel (if
equipped)
Rear air conditioning control screen
Adjust the rear seat heater tem-
perature levelEach time the switch is selected, the tem-
perature level and leve l indicator (orange)
change as follows:
AUTO Hi Mid Lo OFF
Adjust the rear seat ventilator fan
speed levelEach time the switch is selected, the fan
speed level and leve l indicator (blue)
change as follows:
AUTO Hi Mid Lo OFF
Shortcut screen
Adjust the rear seat heater tem-
perature levelEach time the switch is selected, the tem-
perature level and leve l indicator (orange)
change as follows:
AUTO Hi Mid Lo OFF Adjust the rear seat ventilator fan
speed level Each time the switch is selected, the fan
speed level and level indicator (blue)
change as follows:
AUTO Hi Mid Lo OFF■
Rear control panel (if equipped)
Increases the rear seat heater tem-
perature level The seat ventilator can be adjusted in 3 lev-
els. (Low, Mid or Hi)
Enables/Disables the automatic
mode of the rear seat heaters
Decreases the rear seat heater
temperature level If this switch is select ed when the rear seat
heater temperature level is set to Lo, the
rear seat heater will turn off.
■
The heated steering wheel, seat heaters
and seat ventilators can be used when
The engine switch is in IGNITION ON
mode.
■
Air conditioning system-linked control
mode
When the seat ventilator fan speed level is
Hi, the seat ventilato r fan speed becomes
higher according to the fan speed of the air
conditioning system.
■
When the air conditioning system is
operating in S-FLOW mode
If a passenger is not detected in the front A
B
A B
A
B
C
3856-3. Do-it-yourself maintenance
LS500_OM_(U)_1810 6
Maintenance and care before serious problems arise.
The tire pressure detected by the
tire pressure warning system can be
displayed on the multi-information
display. ( P.80)
If the tire pressure drops below a
predetermined level, the driver is
warned by a screen display and a
warning light. ( P.419)
■
Routine tire inflation pressure checks
The tire pressure warning system does not
replace routine tire inflation pressure
checks. Make sure to check tire inflation
pressure as part of your routine of daily
vehicle checks.
■
Tire inflation pressure
●
It may take a few minutes to display the
tire inflation pressure after the engine
switch is turned to IGNITION ON mode.
It may also take a few minutes to display
the tire inflation pres sure after inflation
pressure has been adjusted.
●
Tire inflation pressu re changes with tem-
perature. The displayed values may also be different from the values measured
using a tire pressure gauge. ■
Situations in which the tire pressure
warning system may not operate prop-
erly ●
In the following cases, the tire pressure
warning system may not operate prop-
erly.
• If non-genuine Lexus wheels are used.
• If a tire has been replaced with a tire that
is not an OE (Original Equipment) tire.
• If a tire has been replaced with a tire that
is not of the specified size.
• If tire chains, etc. are installed.
• An auxiliary-supported run-flat tire is
equipped.
• If a window tint that affects the radio wave
signals is installed.
• If there is a lot of snow or ice on the vehi-
cle, particularly around the wheels or
wheel housings.
• If the tire inflation pressure is much higher
than the specified level.
• If wheels not equipped with tire pressure
warning valves and transmitter are used.
• If the ID code on the tire pressure warn-
ing valves and transmitters is not regis-
tered in the tire pressure warning
computer. ●
Performance may be af fected in the fol-
lowing situations.
• When driving near a TV tower, electric
power plant, gas stat ion, radio station,
large display, airport or other facility that
generates strong radi o waves or electri-
cal noise
• When carrying a portable radio, cellular
phone, cordless phone or other wireless
communication device
If tire position information is not correctly
displayed due to the radio wave conditions,
the display may be corrected by changing
the location of the vehicle as the radio wave
conditions may change.
●
When the vehicle is stopped, the time
taken for the warning to start or turn off
may be longer.
●
When the inflation pressure of a tire
drops rapidly, for example when a tire has
burst, the warning may not operate.
390 6-3. Do-it-yourself maintenance
LS500_OM_(U)_1810 2 Press or of the meter con-
trol switch to select .
3 Press or to select “Vehicle
Settings” and then press .
4 Press or to select “TPWS”
and then press .
5 Press or to select “Change
Wheel Set”. Then press and hold
until the tire pressure warning
light blinks slowly 3 times.Then a message will be displayed on the
multi-information display.
When registration is being performed, the
tire pressure warning light will blink for
approximately 1 minute then illuminate and
“---” will be displayed for the inflation pres-
sure of each tire on the multi-information
display.
6 Drive straight (with occasional left
and right turns) at approximately
25 mph (40 km/h) or more for
approximately 10 to 30 minutes.Registration is complete when the tire
pressure warning light turns off and the
inflation pressure of each tire is displayed
on the multi-information display.
Registration may take longer than normal
to complete if the vehicle speed cannot be
maintained at approximately 25 mph (40
km/h) or more. If registration cannot be
completed after driving for 1 hour or more, perform the registrati on procedure again
from the beginning. ( P.390)
After registering the ID codes, make sure
to initialize the tire pressure warning sys-
tem. ( P.388)■
When registering ID codes ●
Before performing ID code registration,
make sure that no wheels with tire pres-
sure warning valve and transmitters
installed are near the vehicle. ●
Make sure to initializ e the tire pressure
warning system after registering the ID
codes. If the system is initialized before
registering the ID codes, the initialized
values will be invalid. ●
As the tires will be warm when registra-
tion is completed, ma ke sure to allow the
tires to cool before performing initializa-
tion. ■
Canceling ID code registration ●
To cancel ID code regi stration after it has
been started, turn the engine switch off
before driving the vehicle.
If the vehicle is driven after ID code regis-
tration is started, to cancel registration,
perform the ID code registration start
procedure again and turn the engine
switch off before driving. ●
If ID code registration has been canceled,
the tire pressure warning light will blink
for approximately 1 minute when the
engine switch is tu rned to IGNITION
ON mode and then illuminate. The tire
pressure warning system will be opera-
tional when the tire pressure warning
light turns off.
●
If the warning light does not turn off even
after several minutes have elapsed, ID
code registration may not have been can-
celled correctly. To cancel registration,
perform the ID code registration start
procedure again and then turn the engine
switch off before driving.
■
If ID codes are not registered properly
●
In the following situations, ID code regis-
tration may take longer than usual to be
completed or may not be possible. (Usu-
ally, the vehicle will need to be driven for