2010 Lexus GX460 warning light

337
2-4. Using other driving systems
2
When driving
GX460_U.S.A. (OM60E69U)
CAUTION
■TRAC/Active TRAC may not operate effectively when
Directional control and power may not be achievable while driving on slippery road
surfaces, even if the TRAC/Active TRAC is operating. 
Do not drive the vehicle in conditions where stability and power may be lost.
■Hill- start assist control does not operate effectively when
Do not overly rely on the hill-start assist co ntrol. The hill-start assist control may not
operate effectively on steep incl ines and roads covered with ice.
■When the VSC is activated
The slip indicator light flashes and a warning buzzer sounds. Always drive carefully. 
Reckless driving may cause an accident. Ex ercise particular care when the indica-
tor light flashes and a buzzer sounds.
■When the TRAC or Active TRAC/VSC systems are turned off
Be especially careful and drive at a speed appropriate to the road conditions. As
these are the systems to ensure vehicle stability and driving force, do not turn the
TRAC or Active TRAC/VSC systems off unless necessary.
■Replacing tires
Make sure that all tires are of the same size, brand, tread pattern and total load
capacity. In addition, make sure that the tires are inflated to the recommended tire
inflation pressure level.
The ABS/Multi Terrain ABS and VSC systems will not function correctly if different
tires are installed on the vehicle. 
Contact your Lexus dealer for further info rmation when replacing tires or wheels.

339
2-4. Using other driving systems
2
When driving
GX460_U.S.A. (OM60E69U)
PCS (Pre-Collision System)
: If equipped
When the system detects the possibilit y of a frontal collision, the systems
such as the brakes and seat belts are automatically engaged to lessen
impact and injuries to occupant s as well as vehicle damage.
■Pre-collision seat belts (front seat belts only)
If the system detects that a collisio n is unavoidable, the system will
retract the seat belt be fore the collision occurs. 
The same will happen if the driver makes an emergency braking or
loses control of the vehicle. ( P. 8 8 )
However, when the VSC system is disabled, the system will not
operate in the event of skidding.
■ Pre-collision brake assist
When there is a high possibility of a frontal collision, the system
applies greater braking force in rela tion to how strongly the brake
pedal is depressed.
■ Pre-collision braking
When there is a high possibility of a frontal collision, the system
warns the driver using a warning light , warning display and buzzer. If
the system determines that a collision is unavoidable, the brakes are
automatically applied to reduce the collision speed. Pre-collision
braking can be disabled using th e pre-collision braking off switch.

340
2-4. Using other driving systems
GX460_U.S.A. (OM60E69U)
Disabling pre-collision brakingPre-collision braking disabled
Pre-collision braking enabled
The “PCS” warning light comes on
when pre-
collision braking is dis-
abled.
■ AVS (Adaptive Variable Suspension System) control (if equipped)
When the system determines that there is a high possibility of a colli-
sion, the AVS optimizes the damping effect ( P. 316)
■ Driver monitor system (if equipped)
When the system determines that there is a possibility of a collision,
and the driver is not facing forwar d, PCS warnings are given in
advance to warn the driver. If the driver continues to be not facing
forward, and a probable collisio n is detected, PCS informs the
driver of danger by performing slig ht braking to provide a physically
warning (pre-collision alert braking). ( P. 340)

344
2-4. Using other driving systems
GX460_U.S.A. (OM60E69U)
■Obstacles not detected
The system cannot detect plastic obstacles such as pylons. There may also be occa-
sions when the system cannot detect pedestrians, animals, bicycles, motorcycles,
trees, or snowdrifts.
■When there is a malfunction in the system
Warning lights and/or warning mess ages will turn on or flash. (P. 6 8 6 , 6 9 8 )
■Certification
For vehicles sold in the U.S.A. 
FCC ID: HYQDNMWR004
This device complies with Part 15 of the FCC Rules. Operation is subject to the fol-
lowing 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.
FCC WARNING
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
Radio frequency radiation exposure Information:
This equipment complies with FCC radiatio n exposure limits set forth for an uncon-
trolled environment.
This equipment should be installed and op erated with minimum distance of 20 cm
between the radiator (antenna) and your body.
This transmitter must not be co-located or operating in conjunction with any other
antenna or transmitter.
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 interfer-
ence that may cause undesired operation of the device.

629
4-3. Do-it-yourself maintenance
4
Maintenance and care
GX460_U.S.A. (OM60E69U)
■When to replace your vehicle’s tires
Tires should be replaced if:
●You have tire damage such as cuts, splits, cracks deep enough to expose the
fabric or bulges indicating internal damage
●A tire goes flat repeatedly or cannot be properly repaired due to the size or
location of a cut or other damage
If you are not sure, consult with your Lexus dealer.
■Replacing tires and wheels
If the ID code of the tire pressure warn ing valve and transmitter is not registered,
the tire pressure warning system will not work properly. After driving for about 20
minutes, the tire pressure warning light comes on after blinking for 1 minute to indi-
cate a system malfunction.
■Tire life
Any tire over 6 years old must be checked by a qualified technician even if they
have seldom or never been used or damage is not obvious.
■If the tread on snow tires wears down below 0.16 in. (4 mm) on snow tires
The effectiveness of the tire as snow tires is lost.
■Maximum load of tire
Check that the number given by dividing the maximum load by 1.10 of the replace-
ment tire is greater than 1 /2 of the Gros s Axle Weight Ratings (GAWR) of either
the front axle or the rear axle, whichever is greater.
For the GAWR, see the Certification Label. 
For the maximum load of the tire, see the load
limit at maximum cold tire inflation pressure
mentioned on the sidewall of the tire. 
(  P. 76 5 )

When trouble arises5
673
GX460_U.S.A. (OM60E69U)
5-1. Essential informationEmergency flashers ............... 674
If your vehicle needs 
to be towed ............................ 675
If you think something is 
wrong ....................................... 681
Fuel pump shut off  system..................................... 682
Event data recorder.............. 683
5-2. Steps to take in 
an emergency
If a warning light turns 
on or a warning buzzer 
sounds... ................................. 686
If a warning message is 
displayed................................ 698
If you have a flat tire............... 720
If the engine will not start .... 734
If the shift lever cannot be 
shifted from P ....................... 736
If you lose your keys ............... 737
If the electronic key does 
not operate properly.......... 738
If the vehicle battery is 
discharged .............................. 741
If your vehicle overheats ...... 744
If the vehicle becomes 
stuck......................................... 747

686
GX460_U.S.A. (OM60E69U)
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer sounds...
Stop the vehicle immediately. Continuing to drive the vehicle may be
dangerous.
The following warning in dicates a possible problem in the brake system.
Immediately stop the vehicl e in a safe place and contact your Lexus
dealer.
*: Parking brake engaged warning buzzer: 
A buzzer will sound if the vehicle is driv en at a speed of approximately 3 mph (5
km/h) or more.
Warning lightWarning light/Details
(U.S.A.)

(Canada)
Brake system warning light (warning buzzer)*
•Low brake fluid
• Malfunction in the brake system
This light also comes on when the parking brake is not
released. If the light turns off after the parking brake is fully
released, the system is operating normally.
Calmly perform the following actions if any of the warning lights turn on or
flash. If a light turns on or flashes, bu t then turns off, this does not necessar-
ily indicate a malfunction in the system.

5
When trouble arises
687
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
Stop the vehicle immediately.The following warning indicates the po ssibility of damage to the vehicle
that may lead to an ac cident. Immediately stop the vehicle in a safe place
and contact your Lexus dealer.
Have the vehicle inspected by your Lexus dealer immediately.
Failing to investigate the cause of the following warnings may lead to the
system operating abnormally and possibly cause an accident. Have the
vehicle inspected by your Lexus dealer immediately.
Warning lightWarning light/Details
Charging system warning light
Indicates a malfunction in the vehicle’s charging system
while the engine is running.
Warning lightWarning light/Details
(U.S.A.)

(Canada)
Malfunction indicator lampMalfunction in:
• The emission control system;
• The electronic engine control system;
• The electronic throttle control system; or
• The electronic automatic transmission control system.