traction control Lexus GX460 2012 Owner's Manual

22
GX460_U.S.A. (OM60J00U)
CAUTION
■General precautions while driving
Driving under the influence: Never drive your vehicle when under the influence of
alcohol or drugs that have impaired your ability to operate your vehicle. Alcohol
and certain drugs delay reaction time, impair judgment and reduce coordination,
which could lead to an accident that could result in death or serious injury.
Defensive driving: Always drive defensively. Anticipate mistakes that other drivers
or pedestrians might make and be ready to avoid accidents.
Driver distraction: Always give your full attention to driving. Anything that distracts
the driver, such as adjusting controls, talking on a cellular phone or reading can
result in a collision with resulting death or serious injury to you, your occupants or
others.
■General precaution regarding children’s safety
Never leave children unattended in the vehicle, and never allow children to have or
use the key.
Children may be able to start the vehicle or shift the vehicle into neutral. There is
also a danger that children may injure themselves by playing with the windows, the
moon roof, or other features of the vehicle. In addition, heat build-up or extremely
cold temperatures inside the vehicle can be fatal to children.

302
2-4. Using other driving systems
GX460_U.S.A. (OM60J00U)
■The Multi-terrain Select can be operated when
●Vehicle speed is less than 7 mph (12 km/h)
●Crawl Control is off
■When using Multi-terrain Select
The following functions cannot be switched on or off.
●VSC
●Active TRAC
●Second start mode
A message will be shown on the multi-information display stating that these func-
tions cannot be switched using the VSC OFF switch or the menu and “ENTER”
switches.
■When selecting a terrain mode
If you are unsure which mode is appropriate, select MOGUL when the four-wheel
drive control switch is in L4 or select MUD & SAND when it is in H4.
■When it is difficult to generate traction
MUD & SAND mode provides the largest amount of tire slippage, followed by
LOOSE ROCK, MOGUL and ROCK mode.
Drivability can be improved by selecting a mode which provides a smaller amount
of tire slippage than the current mode when the amount of tire slippage is large, or
conversely selecting a mode which provides a larger amount of tire slippage than
the current mode when the amount of tire slippage is small.
■When the vehicle is stuck
Switching the transfer and differential
For the operation of the following functions, refer to the following pages.
●Four-wheel drive system ( →P. 322)
●Center differential lock ( →P. 323)

322
2-4. Using other driving systems
GX460_U.S.A. (OM60J00U)
Four-wheel drive system
Use the four-wheel drive control switch and center differential lock/unlock
switch to select the following transfer and center differential modes.
■Four-wheel drive control switch
H4 (high speed position)
Normal driving on all types of
roads.
L4 (low speed position)
Driving requiring maximum
power and traction such as
climbing or descending steep
hills, off-road driving, and hard
pulling in sand or mud, etc.
The low speed four-wheel
drive and VSC OFF indica-
tors will come on.

327
2-4. Using other driving systems
2
When driving
GX460_U.S.A. (OM60J00U)
CAUTION
■While driving
Observe the following precautions. Failure to do so may cause an accident result-
ing in death or serious injury.
●Never move the four-wheel drive control switch if the wheels have lost traction.
●Do not operate the center differential lock/unlock when the vehicle is turning or
when its wheels are spinning freely off the ground.
NOTICE
■To prevent damage to the center differential
●For normal driving on dry and hard surface roads, unlock the center differential.
●Unlock the center differential after the wheels are out of the ditch or off the slip-
pery or bumpy surface.

328
2-4. Using other driving systems
GX460_U.S.A. (OM60J00U)
Crawl Control∗
∗: If equipped
Allows travel on extremely rough off-road surfaces at a fixed low speed
without pressing the accelerator or brake pedal. Minimizes loss of traction
or vehicle slip when driving on slippery road surfaces, allowing for stable
driving.
■ Crawl Control switch
ON/OFF switch
Speed selection switch
■ System operation
On/off
The Crawl Control indicator is
lit and the slip indicator flashes
when operating.
Also, the operating status and
speed select status of the Crawl
Control are shown on the multi-
information display.
Higher
Lower

336
2-4. Using other driving systems
GX460_U.S.A. (OM60J00U)
■TRAC (Traction Control) for H4 mode
Helps to maintain drive power and prevent the drive wheels from spinning
when starting the vehicle or accelerating on slippery roads
■Active TRAC (Traction Control) for L4 mode*
Helps to maintain drive power and prevent the 4 wheels from spinning
when starting the vehicle or accelerating on slippery roads, or in off-road
conditions
■Hill-start assist control
Helps to prevent the vehicle from rolling backward when starting on an
incline or slippery slope
■KDSS (Kinetic Dynamic Suspension System)
KDSS helps to enhance ride comfort and handling response by using a
hydraulic control system to control the suspension stabilizer bars in
response to road surface and driving conditions during cornering or off-
road driving
■ PCS (Pre-Collision System) (if equipped)
→ P. 3 4 3
*: The function only works in vehicles with Multi-terrain Select when Multi-
terrain Select is switched on

690
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60J00U)
Warning lightWarning light/Details
SRS warning lightMalfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system.
(U.S.A.)

(Canada)
ABS warning lightMalfunction in:
•The ABS; or
• The brake assist system.
Slip indicator light
Malfunction in:
•The VSC;
• The active traction control system;
The indicator will blink when the system listed above or
below is operational. (→ P. 3 3 7 )
• The downhill assist control system
*;
• The hill-start assist control system
*; or
• Crawl Control system*.
(Flashing)
“PCS” warning light*
Indicates a malfunction in the pre-collision system.
The warning light will operate as follows, even when the sys-
tem is not malfunctioning:
• The light will flash quickly when the system is operating.
(→ P. 3 4 3 )
• The light will turn on when the pre-crash braking is dis- abled. ( →P. 3 4 4 )
• The light will turn on when the system cannot temporarily be used. ( →P. 7 0 7 )

772
6-1. Specifications
GX460_U.S.A. (OM60J00U)
Uniform Tire Quality Grading
This information has been prepared in accordance with regulations
issued by the National Highway Traffic Safety Administration of the U.S.
Department of Transportation.
It provides the purchasers and/or prospective purchasers of Lexus vehi-
cles with information on uniform tire quality grading.
Your Lexus dealer will help answer any questions you may have as you read
this information.
■ DOT quality grades
All passenger vehicle tires must conform to Federal Safety Require-
ments in addition to these grades. Quality grades can be found where
applicable on the tire sidewall between tread shoulder and maximum
section width.
For example: Treadwear 200 Traction AA Temperature A
■Treadwear
The treadwear grade is a comparative rating based on the wear rate of
the tire when tested under controlled conditions on a specified gov-
ernment test course.
For example, a tire graded 150 would wear one and a half (1 - 1 /2) times as
well on the government course as a tire graded 100.
The relative performance of tires depends upon the actual conditions of
their use. Performance may differ significantly from the norm due to varia-
tions in driving habits, service practices and differences in road characteris-
tics and climate.

773
6-1. Specifications
6
Vehicle specifications
GX460_U.S.A. (OM60J00U)■
Traction AA, A, B, C
The traction grades, from highest to lowest, are AA, A, B and C, and
they represent the tire’s ability to stop on wet pavement as measured
under controlled conditions on specified government test surfaces of
asphalt and concrete.
A tire marked C may have poor traction performance.
Warning: The traction grade assigned to this tire is based on braking
(straight ahead) traction tests and does not include cornering (turning) trac-
tion.
■Temperature A, B, C
The temperature grades are A (the highest), B, and C, representing
the tire’s resistance to the generation of heat and its ability to dissipate
heat when tested under controlled conditions on a specified indoor
laboratory test wheel.
Sustained high temperature can cause the material of the tire to degenerate
and reduce tire life, and excessive temperature can lead to sudden tire fail-
ure.
The grade C corresponds to a level of performance which all passenger car
tires must meet under the Federal Motor Vehicle Safety Standard No. 109.
Grades B and A represent higher levels of performance on the laboratory
test wheel than the minimum required by law.
Warning: The temperature grades of a tire assume that it is properly inflated
and not overloaded.
Excessive speed, underinflation, or excessive loading, either separately or in
combination, can cause heat buildup and possible tire failure.

820
GX460_U.S.A. (OM60J00U)
Alphabetical index
Alphabetical index
A/CFront automatic air conditioning
system
*............................................... 392
Rear automatic air conditioning
system
*............................................... 407
ABS.............................................................335
Active traction control........................336
Adaptive front lighting system ........ 223
Adaptive variable suspension system...................................................... 321
AFS ............................................................. 223
Air conditioning filter .......................... 642
Air conditioning system Air conditioning filter ....................... 642
Front automatic air conditioning system
*............................................... 392
Rear automatic air conditioning system
*............................................... 407
Airbags Airbag deployment
conditions............................................. 126
Airbag precautions for your
child......................................................... 132
Airbag warning light ....................... 690
Front passenger occupant classification system........................139
General airbag precautions ............131
Locations of airbags........................... 122
Modification and disposal of airbags ...................................................136
Proper driving posture .....................120
Side airbag precautions ...................133
Side and curtain shield airbags deployment conditions ................. 127
Side and curtain shield airbag precautions .........................................134
SRS airbags ............................................ 122 Alarm............................................................ 117
Antenna .................................................... 420
Anti-lock brake system ...................... 335
Armrest .................................................... 554
Audio input.............................................. 459
Audio system
Antenna.................................................. 420
Audio input........................................... 459
AUX port .............................................. 459
CD player/changer ..........................423
iPod .......................................................... 440
MP3/WMA disc................................. 431
Optimal use ..........................................457
Portable music player ..................... 459
Radio ......................................................... 415
Steering wheel audio switch........ 460
USB memory ...................................... 448
Audio/video remote controls*
Audio/video system*
Automatic air conditioning system
Air conditioning filter ........................642
Front automatic air conditioning system
*...............................................392
Rear automatic air conditioning
system
*.............................................. 407
Automatic light control system.........219
Automatic transmission Automatic transmission ...................186
If the shift lever cannot be shifted from P ................................................... 737
S mode .....................................................189
AUX port
*.............................................. 459
Auxiliary box .............................. 533, 560
AVS..............................................................321
A