sensor Lexus GS300 2006 Starting and Driving

STARTING AND DRIVING
437
NOTICE
Do not use liquid sealants for a flat tire as tire
pressure sensors will be damaged.
When the tires must be repaired or replaced, have
them repaired or replaced by the nearest Lexus
dealer or authorized tire dealer. The tire pressure
sensors will be affected by the installation or removal
of tires.
When the tires must be replaced, replace the
grommets for tire pressure sensors as well.
System malfunction
G31048
If the low tire pressure warning light blinks and the above
message appears on the multi−information display, it
indicates a system malfunction. Contact your Lexus
dealer.
The system will be disabled in the conditions below:
Electric devices or facilities using similar radio wave
frequencies are nearby.
If a radio set at similar frequencies is in use.
Much snowflakes or ice gets on the vehicle, in particular,
around the wheels or wheel housings.
Non−genuine Lexus wheels are used.
Snow tires or tire chains are used.
The sensor battery is expired.
The tires not equipped with tire pressure sensor are used.

STARTING AND DRIVING
438Although the tires are equipped with tire pressure sensors,
the selector switch (see page 442) is set to other tire setting.
NOTICE
The use of non−genuine wheels will cause the tire
pressure sensors to transmit the electronic code in
different manner, resulting in the failure of the
system.
The use of tires other than originally installed with
genuine wheels may also cause the malfunction of
the system.
For vehicles sold in U.S.A.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions: (1)
This device may not cause harmful interference, and (2)
this device must accept any interference received,
including interference that may cause undesired
operation.
NOTICE:
This equipment has been tested and found to comply
with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful
interference in a residential installation. This equipment
generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to
radio communications. However, there is no guarantee
that interference will not occur in a particular
installation. If this equipment does cause harmful
interference to radio or television reception, which can
be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by
one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and
receiver.

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439
Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected.
Consult the dealer or an experienced radio / TV
technician for help.
FCC WARNING:
Changes or modifications not expressly approved
by the party responsible for compliance could void
the user’s authority to operate the equipment.
For vehicles sold in Canada
Operation is subject to the following two conditions: (1)
this device may not cause interference, and (2) this
device must accept any interference, including
interference that may cause undesired operation of the
device.
Replacing tires and wheels
As you might have difficulty in locating a flat or deflated
tire, a tire pressure warning system should be installed on
the tires of this vehicle.
When replacing the wheels, be sure to install tire pressure
sensors on the wheels.
There are 3 ways to set up the tire pressure sensors:
a. Remove the sensor from the old wheel and install it to the
new wheel.
b. Keep the same wheel with tire pressure sensor and replace
the tire alone.
c. Use a new wheel and sensor.
You have to register an ID code for a new sensor. Up to 2
sets of codes can be registered. As one ID for the originally
installed sensor is registered at “MAIN” of the selector
switch, use the “2nd” position to register an ID for the new
sensor.
You do not need to re−register the ID code for any other
replacements. For the use of the originally installed tires,
put the selector switch at “MAIN” and for the use of tires set
purchased later, put the switch at “2nd”. For the sensor
selector switch, see page 442.

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440
NOTICE
Have the tires, wheels or sensors replaced and ID
codes registered by Lexus dealer. If you need
sensors, purchase from Lexus dealer.
The sensor nuts should always be tightened to a
torque of 4 N·m (0.4 kgf·m, 2.9 ft·lbf).
The use of non−genuine wheels will cause the tire
pressure sensors to transmit the electronic code in
different manner, resulting in the failure of the
system.
Tire pressure warning system reset switch
G31004
The tire pressure warning system needs to be initialized
in the following conditions:
After replacing or rotating tires or wheels
After replacing the tire pressure sensor
When initializing the system, the present tire condition is
stored as a standard.

STARTING AND DRIVING
442
NOTICE
Do not turn the engine switch off during initialization,
or the system may not function properly due to
incomplete initialization.
Check which tires are being used before initialization
of the system, and also check the selector switch
position. (See the following “Selector switch”.)
Selector switch
G31005

1
Main position 2
2nd position
The selector switch is located on the underside of the
glove box.
The ID code is given in the tire pressure sensor. To
activate the tire pressure warning system, it is necessary
to register the ID code of the sensor on the selector switch
in the vehicle.
2 sets of ID codes can be registered. The code of the tires
originally installed on the vehicle is registered on the switch at
“MAIN”. Have a new tires set with new tire pressure sensors
registered at “2nd” by Lexus dealer.
ID codes should be registered by Lexus dealer. Once
registered, change the setting position each time you purchase
tires and wheels. Re−registration is not required.
When purchasing new tires, consult your Lexus dealer.

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443
CAUTION
When the tires whose ID code is registered at “MAIN”
are used, the system does not work properly with the
selector switch set at “2nd”. If the tires whose ID code
is registered at “2nd” are stored nearby, the system will
detect their tire inflation pressure (and vice versa).
Liquid sealants for flat tires
NOTICE
Do not use liquid sealants for flat tires as the tire
pressure sensors will be damaged.
PRE−COLLISION SYSTEM
(Vehicles with dynamic radar cruise control)
When the pre−collision system detects what it perceives
to be an unavoidable collision, the front seat belts are
quickly drawn back by the retractors (pre−collision seat
belts) and more powerful braking is applied according to
the amount of pedal depression to help reduce injury to
the occupants and damage to the vehicle body. In
addition, the adaptive variable suspension works to help
regulate the vehicle not to pitch forward so much.
The pre−collision system will operate when the engine switch
is selected in “IG−ON” mode.

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Pre−collision sensor
The millimeter wave radar sensor detects vehicles or
objects near or on the road your vehicle is traveling and
determines the possibility of a collision based on the
object position, vehicle speeds and the course you are
traveling.
The pre−collision sensor will operate when the vehicle speed
is about 5 km/h (3 mph) or over.
G31019

1
Millimeter wave grille cover
2
Millimeter wave radar sensor
The millimeter wave radar sensor is installed in the front grille
of the hood.
The millimeter wave radar sensor cannot detect plastic objects
such as pylons, and may not detect people, animals, bicycles,
motor cycles, trees, snowbanks, etc. as objects with which
your vehicle may collide.
CAUTION
To ensure that pre−collision system will function
properly while driving, observe the following. Failure to
follow these instructions could reduce the
effectiveness of the pre−collision system in case of
vehicle accident:
Always keep the millimeter wave radar sensor and
grille cover clean. When cleaning, use a soft cloth
and be careful not to damage the sensor and grille
cover.
Avoid strong impacts around the millimeter wave
radar sensor. An incorrect millimeter wave radar
sensor alignment will result in system malfunction.
A special device is required to adjust the millimeter
wave radar sensor alignment. Be sure to have the
sensor adjusted by your Lexus dealer.
Do not disassemble the millimeter wave radar
sensor.
Do not affix a sticker (including a transparent sticker)
or attach an accessory around the millimeter radar
sensor or the grille cover.
Do not modify or paint the grille cover. When
replacing the grille cover, be sure to use a genuine
grille cover.

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Pre−collision seat belts (Front seat belts only)
When the pre−collision sensor detects an object or
vehicle with which your vehicle might collide and
determines that a collision may be unavoidable, the seat
belts are quickly drawn back by the retractors to enhance
the effects of the seat belt pretensioners. The
pre−collision seat belts also work as well when hard
braking.
The pre−collision seat belts will operate in the following
conditions:
When the approaching speed in regard to the object or the
vehicle exceeds about 30 km/h (18 mph).
When the front seat occupants wear the seat belts.
In the following conditions, the seat belts are quickly drawn
back by the retractors regardless of the possibility of the
collision:
When the vehicle speed is about 14 km/h (9 mph) or over.
When the vehicle is spinning or cannot take a turn properly.
Pre−collision brake assist system
When the pre−collision sensor detects an object or
vehicle with which your vehicle might collide, and
determines that a collision may be unavoidable,
depressing the brake pedal provides more powerful
braking according to the amount of pedal depression.
The pre−collision brake assist system will operate in the
following conditions:
When the vehicle speed is about 30 km/h (18 mph) or over.
When the brake pedal is depressed.
When the approaching speed in regard to the object or the
vehicle exceeds about 30 km/h (18 mph).
If the brake pedal is kept depressed before the sensor’s
determination of unavoidable collision, the pre−collision brake
assist system will operate soon after the sensor’s
determination.

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Adaptive variable suspension control (GS430
only)
When the pre−collision sensor detects an object or
vehicle with which your vehicle may collide, and
determines that a collision may be unavoidable, the
adaptive variable suspension adjusts the damping effect
on the shock absorbers and regulates the vehicle not to
pitch forward so much.
The adaptive variable suspension will operate in the following
conditions:
When the vehicle speed is about 5 km/h (3 mph) or over.
When the approaching speed in regard to the object or the
vehicle exceeds about 30 km/h (18 mph).
Pre−collision system failure warning
G31079

Pre−collision system warning light
The light warns that there is a problem somewhere in the
pre−collision system.
The light comes on when the engine switch is selected in
“IG−ON” mode. If the system works properly, the light goes off
after a few seconds.
If the light does not come on when the engine switch is selected
in “IG−ON” mode, have your vehicle checked by your Lexus
dealer.
If the system has a problem, the pre−collision system warning
light comes on or blinks. At this time, the master warning light
comes on, a warning tone sounds, and either of the following
messages appears on the multi−information display.
PCS DISABLED NOW
CHECK PCS

STARTING AND DRIVING
447
G13030
The pre−collision system warning light blinks, and the
above message appears in the following conditions:
The millimeter wave radar sensor or the grille cover is
dirty.
Clean the grille or sensor with a soft cloth to remove the dirt.
The pre−collision seat belts are activated repeatedly for
a short time.
The system turns off temporarily for overheating protection.
The above conditions do not indicate a malfunction. If the
problem is removed, the warning lights and message go out
and the system returns to normal.
G13031
If the pre−collision system warning light remains on, and the
above message appears, the pre−collision system may not
operate. Contact your Lexus dealer as soon as possible to
service the vehicle.
Precaution for pre−collision system
It should be noted that the pre−collision sensor may detect the
following as the objects with which your vehicle might collide,
and the pre−collision system may operate, even though there
is no possibility of collision.
When traveling through a curve, there is an object on the
edge of the road.
When traveling through a curve, another vehicle is passing
from the opposite direction.
When traveling across a narrow iron bridge.
When there is a metallic object on the road.
When there is a steel plate on the road at a construction site.
When there is a bump on the road.
When waiting to turn to the left in an intersection, and
another vehicle is passing from the opposite direction.
If your vehicle approaches another vehicle ahead very
quickly.