warning light Lexus GX470 2006 Basic Functions In Frequent Use / LEXUS 2006 GX470 (OM60B99U) Service Manual

STARTING AND DRIVING
380If the “VSC TRAC” warning light comes on, there may be an
abnormality in any of the following systems in addition to the
downhill assist control system.

Hill −start assist control
 Active traction control system
 Vehicle stability control system
When the system is normal and the ignition key is turned to
“ON”, the warning light will come on and will go off after a few
seconds. It is not a malfunction that the warning light may stay
on for 60 seconds after the ignition key is turned to the “ON”
position.
Depressing the brake pedal repeatedly may turn on the light.
It is normal if it goes out after a few seconds.
If the “VSC TRAC” warning light and slip indicator light comes
on while driving, the system does not work. However, as
normal braking operates when being applied, it is no problem
to continue your driving.
In the following cases, contact your Lexus dealer:
 The warning light does not come on after the ignition key is
turned to “ON”.
 The warning light remains on after the ignition key is turned
to “ON”.
 The warning light comes on while driving.
HILLSTART ASSIST CONTROL
The hillstart assist control assists you in starting to move
up a steep or slippery hill. When you start to move up the
hill slope, the system helps to prevent the vehicle from
rolling backward in the interval while you move your foot
from the brake pedal to the accelerator pedal.
CAUTION
 Do not rely excessively on the hillstart assist
control. The vehicle may not be able to start
smoothly on road surfaces or offroad surfaces such
as extremely steep slopes or icy roads, on which
sliding can occur very easily.
 Do not use the hillstart assist control to stop the
vehicle. The hillstart assist control is not designed
as a function for stopping the vehicle on a uphill
slope.

STARTING AND DRIVING
382If the system continues to operate, the buzzer sound changes
from intermittent to continuous. (The continuous buzzer
sounds
for about 3 seconds.) At this time, the slip indicator light
will come on and the hill −start assist control stops operating
temporarily in order to protect the brake actuator. (Although
the hill−start assist control does not operate, it is no problem
to continue your driving.) The system will be automatically
restored after a short time and the slip indicator light goes out.
“VSC TRAC” warning light
If there is any abnormality in the system, the “VSC TRAC”
warning light will come on.
If the system malfunctions, the “VSC TRAC” warning light will
come on.
If the “VSC TRAC” warning light comes on, there may be an
abnormality in any of the following systems in addition to the
hill−start assist control.
 Downhill assist control system
 Active traction control system
 Vehicle stability control system
When the system is normal and the ignition key is turned to
“ON”, the warning light will come on and will go off after a few
seconds. It is not a malfunction that the warning light may stay
on for 60 seconds after the ignition key is turned to the “ON”
position.

STARTING AND DRIVING
383
Depressing the brake pedal repeatedly may turn on the light.
It is normal if it goes out after a few seconds.
If the “VSC TRAC” warning light and slip indicator light comes
on while driving, the system does not work. However, as
normal braking operates when being applied, it is no problem
to continue your driving.
In the following cases, contact your Lexus dealer:

The warning light does not come on after the ignition key is
turned to “ON”.
 The warning light remains on after the ignition key is turned
to “ON”.
 The warning light comes on while driving.
BRAKE SYSTEM
This brake system has 2 independent hydraulic circuits. If
either circuit should fail, the o ther will still work. However, the
pedal will be harder to press, and your stopping distance will
increase. Also, the brake system warning light may come on.
CAUTION
Do not drive your vehicle with only a single brake
system. Have your brakes fixed immediately.
Brake booster
The brake booster uses brake fluid pressurized by the pump
to power−assist the brakes. If the brake booster fails during
driving, the brake system warning light comes on and buzzer
sounds continuously. In this case, the brakes may not work
properly. If they do not work well, depress the brake pedal
firmly. If the brake system warning light comes on, immediately
stop your vehicle and contact your Lexus dealer.
The brake system warning light may stay on for about 60
seconds after the ignition key is turned to the “ON” position. It
is normal if the light turns off after a while.
Depressing the brake pedal repeatedly may turn on the brake
system warning light and buzzer. It is normal if the light goes
out and the buzzer stops sounding after a few seconds.

STARTING AND DRIVING
386“ABS” warning light
1U.S.A.2Canada
The light comes on when the ignition key is turned to the “ON”
position. If the anti−lock brake system and the brake assist
system work properly, the light turns off after a few seconds.
Thereafter, if either of the systems malfunctions, the light
comes on again.
When the “ABS” warning light is on (and the brake system
warning light is off), the anti −lock brake system, the brake
assist system, the active traction control system and the
vehicle stability control system do/does not operate, but the
brake system still operates conventionally.
When the “ABS” warning light is on (and the brake system
warning light is off), the anti −lock brake system does not
operate so that the wheels could lock up during a sudden
braking or braking on slippery road surfaces. If either of the following conditions occurs, this indicates
a malfunction somewhere in the components monitored
by the warning light system. Contact your Lexus dealer as
soon as possible to service the vehicle.

The light does not come on when the ignition key is turned
to the “ON” position, or remains on.
 The light comes on while you are driving.
A warning light turning on briefly during operation does not
indicate a problem.
CAUTION
If the “ABS” warning light remains on together with the
brake system warning light, immediately stop your
vehicle at a safe place and contact your Lexus dealer.
In this case, not only the antilock brake system will fail
but also the vehicle will become extremely unstable
during braking.
Either of the following conditions may occur, but do not
indicate a malfunction:
 The light may stay on for about 60 seconds after the ignition
key is turned to the “ON” position. It is normal if it turns off
after a while.
 Depressing the brake pedal repeatedly may turn on the
light. It is normal if it turns off after a few seconds.

STARTING AND DRIVING
387
Brake assist system
When you slam the brakes on, the brake assist system
judges as an emergency stop and provides more powerful
braking for a driver who cannot hold down the brake pedal
firmly.
When you slam the brakes on, more powerful braking will be
applied. At this time, you may hear a sound in the engine
compartment and feel the vibrations of the brake pedal. This
does not indicate a malfunction.
The brake assist system becomes operative after the vehicle
has accelerated to a speed in excess of approximately 10 km/h
(6 mph). It stops operating when the vehicle decelerates to a
speed below approximately 5 km/h (3 mph).
The brake assist system may not work for about 60 seconds
after the engine is started.
For an explanation of this system’s warning light, see “ABS
warning light” on page 57.
Drumindisc type parking brake system
Your vehicle has a drum−in−disc type parking brake system.
This type of brake system needs bedding −down of the brake
shoes periodically or whenever the parking brake shoes and/or
drums are replaced.
Have your Lexus dealer perform the bedding −down.
TIRE PRESSURE WARNING
SYSTEM
The tire pressure warning system is designed to provide
warning when tire inflation pressure of one or more of
your tires (including the spare tire) is low. The low tire
pressure warning light comes on to inform you that low
tire inflation pressure may hamper driving.
Low tire pressure warning light
This light comes on when the ignition key is turned to the “ON”
position. It goes off after a few seconds. This indicates that the
tire pressure warning system is functioning properly.

STARTING AND DRIVING
388If the low tire pressure warning light comes on or blinks,
do the following.
If the warning light comes on:
Stop your
vehicle in a safe place as soon as possible and
check that the inflation pressure of all tires (including the
spare tire) is as specified on the tire and loading
information label. (See “Checking tire inflation pressure”
on page 523.) If the warning light comes on even after tire
inflation pressure adjustment, you may have a flat tire. If
you have a flat tire, replace it with the spare tire. For
details, see “If you have a flat tire” on page 432.
The warning light goes off a few minutes after air is put into the
deflated tire.
This warning light may turn on due to natural causes such as
natural air leaks or tire pressure changes caused by
temperature. In this case, adjusting the tire pressure will turn
off the warning light.
CAUTION
When the low tire pressure warning light comes on,
observe the following instructions:
 Depending on the conditions, reduce to an
appropriate speed as soon as possible.
 Adjust the tire pressure to the specified level as soon
as possible.
 Avoid abrupt steering wheel maneuvering and
braking. Tire deterioration may reduce steering
wheel control and brake effectiveness. This may lead
to serious injury or death.
 The tire pressure warning system may not activate
immediately if sudden bursts of air leakage occur.

STARTING AND DRIVING
389
NOTICE
Do not use liquid sealants for a flat tire as air 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.
 The tire pressure warning system is not to be used as
a substitute for regular inspections. Be sure to check
the air pressure in the tires on a regular basis.
 When the tires must be replaced, replace the
grommets for air pressure sensors as well.
If the warning light blinks:
The tire pressure warning system may be malfunctioning.
Contact your Lexus dealer.
System malfunction
The tire pressure warning system does not function
properly under certain circumstances. In the following
cases, the low tire pressure warning light may not come
on even if the tire inflation pressure is low, or it may come
on when the tire inflation pressure is actually normal.
Electric devices or facilities using similar radio wave
frequencies are nearby.
 A radio set to similar frequencies is in use.
 A lot of snow or ice covers the vehicle, in particular, around
the wheels or wheel housings.
 The tires are not equipped with an air pressure sensor.
 Tire chains are used.
 Non −genuine Lexus wheels are used.
 Although the tires are equipped with air pressure sensors,
the selector switch (see page 393.) is set to other tire setting.

STARTING AND DRIVING
391
As an added safety feature, your vehicle has been
equipped with a tire pressure monitoring system
(TPMS — tire pressure warning system) that
illuminates a low tire pressure telltale (low tire
pressure warning light) when one or more of your
tires is significantly underinflated. Accordingly,
when the low tire pressure telltale (low tire pressure
warning light) illuminates, you should stop and check
your tires as soon as possible, and inflate them to the
proper pressure. Driving on a significantly
underinflated tire causes the tire to overheat and can
lead to tire failure. Underinflation also reduces fuel
efficiency and tire tread life, and may affect the
vehicle’s handling and stopping ability.
Please note that the TPMS (tire pressure warning
system) is not a substitute for proper tire maintenance,
and it is the driver’s responsibility to maintain correct
tire pressure, even if underinflation has not reached
the level to trigger illumination of the TPMS low tire
pressure telltale (low tire pressure warning light).
For vehicles sold in U.S.A.
This device complies with Part 15 of the FCC Rules. Opera-
tion 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 rea-
sonable protection against harmful interference in a residen-
tial 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 in-
terference to radio communications. However, there is no
guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interfer-
ence to radio or television reception, which can be deter-
mined by turning the equipment off and on, the user is en-
couraged 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 re-
ceiver.
 Connect the equipment into an outlet on a circuit dif ferent
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.

IN CASE OF AN EMERGENCY
457
 1
Lexus Link System indicator light (green)
2
Lexus Link System warning light (red)
When the ignition is turned to the “ON” position, the warning
light comes on for 2 seconds, then goes off. As soon as it goes
out, the indicator light comes on. This means the Lexus Link
System is operating properly. The indicator light should remain
on to inform you that you have an active subscription. If your
Lexus Link subscription has expired, the indicator light should
go off. To activate your Lexus Link System, press the
“SERVICES” button. To learn more about your subscription
status or how to renew or extend your subscription, please
push the “SERVICES” button to speak to a Lexus Link Advisor,
or you may dial toll free 1−800−25 Lexus (Toll −Free)
(1−800−255−3987) and select the option for Lexus Link. If
problems are detected in the Lexus Link System, the warning
light comes on or you will hear “A system error has been
detected. Please contact your Lexus dealer.” In either case,
take your vehicle to your Lexus dealer. In some cases, even if your subscription has expired, the
indicator light may come on. This is due to the time delay
required to process the deactivation of your Lexus Link
System. During this period, when you push the “SERVICES”
button, your call will be forwarded to enrollment. Once the
deactivation process has been completed, the indicator light
will go off.
NOTICE
The indicator light is the
primary means to let you know
the status of your subscription. It is important to be
aware that an active subscription is required to receive
safety and security services. If the indicator light is
disabled, your subscription has expired. If you would
like to renew your subscription for Lexus Link services,
please contact Lexus Link Call Center by pushing the
“SERVICES” button twice, dial toll free 180025 Lexus
(TollFree) (18002553987) and select the option for
Lexus Link, or contact your Lexus dealer.

IN CASE OF AN EMERGENCY
460If problems are detected in the Lexus Link System, the warning
light comes on or you will hear “A system error has been
detected. Please contact your Lexus dealer.” In either case,
take your vehicle to your Lexus dealer.
Lexus Link
services may not be available in the following
cases.
 The components or wire harnesses for the system are
damaged.
 The Lexus Link Call Center is not operational.
 The antenna does not work properly due to vehicle damage.
 In a weak or non− cellular coverage area.
 Your vehicle is in area where the GPS signal is weak or
cannot be received.
 The Lexus Link subscription has expired.
NOTICE
Upon subscription expiration, all Lexus Link services
(i.e. automatic notification, emergency call functions,
service call functions, remote door locking/unlocking
function, remote horn and lights function) are
deactivated.
Remote Door Locking/Unlocking by Lexus
Link System
The Lexus Link System will allow your vehicle to be locked
and unlocked remotely.
If you find that your vehicle has not been locked, call the Lexus
Link Call Center 1 −800−25−LEXUS (Toll−Free)
(1−800−255−3987) and select the option for Lexus Link, the
Lexus Link Advisor can assist in locking your vehicle.
In case you are locked out, call the Lexus Link Call Center
1−800−25 Lexus (Toll −Free) (1−800−255−3987) and select
the option for Lexus Link, a Lexus Link Advisor can assist in
unlocking your vehicle.
Remote Horn and Lights by Lexus Link
System
The Lexus Link System can flash your headlights and
sound your horn remotely.
Whether you are parked on a city street or in a stadium parking
lot, Lexus Link makes it easy to locate your vehicle quickly.
Call the Lexus Link Call Center 1− 800−25−LEXUS (Toll −Free)
(1−800−255−3987) and select the option for Lexus Link. A
Lexus Link Advisor will flash your headlights and sound your
horn so you can find your vehicle.