traction control Lexus GX470 2006 Engine / LEXUS 2006 GX470 OWNER'S MANUAL (OM60B99U)

For detailed information, refer to the description given in each Section\
.
PICTORIAL INDEX
xviPage
1Automatic transmission second start
indicator light 355
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2Unengaged “Park” warning light 58
. . . . . . . . . . . . . . .
3Automatic transmission fluid temperature
warning light 58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4Low washer fluid warning light 61
. . . . . . . . . . . . . . . . .
5Automatic transmission indicator lights 349 . . . . . .
6Driver’s seat belt reminder light 54
. . . . . . . . . . . . . . . .
7Turn signal indicator light 32
. . . . . . . . . . . . . . . . . . . . .
8Brake system warning light 53
. . . . . . . . . . . . . . . . . . . .
9Headlight high beam indicator light 32
. . . . . . . . . . . .
10Antilock brake system warning light 57
. . . . . . . . . . .
11Open door warning light 58
. . . . . . . . . . . . . . . . . . . . . . .
12Tachometer 50
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13Headlight indicator light 30
. . . . . . . . . . . . . . . . . . . . . . .
14Cruise control indicator light 362
. . . . . . . . . . . . . . . .
15Engine oil replacement reminder light 60
. . . . . . . . . .
16Slip indicator light 373, 375, 378, 381
. . . . . . . . . . . . .
17Low engine oil pressure warning light 60
. . . . . . . . . .
18Charging system warning light 59
. . . . . . . . . . . . . . . . . Page
19Engine coolant temperature gauge
49
. . . . . . . . . . . . .
20Malfunction indicator lamp 56
. . . . . . . . . . . . . . . . . . . .
21Vehicle stability control system off
indicator light 376 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22Roll sensing of curtain shield airbags off
indicator light 174. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23Kinetic dynamic suspension system
warning light 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24Center differential lock indicator light 356
. . . . . . . .
25Vehicle stability control system and active
traction control system warning light 59 . . . . . . . . . . .
26Downhill assist control system
indicator light 378. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27Height control indicator lights 370
. . . . . . . . . . . . . . .
28Security indicator light 12, 27
. . . . . . . . . . . . . . . . . . . .
29SRS warning light 55
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30Trip meter reset knob 50
. . . . . . . . . . . . . . . . . . . . . . . . .
31Odometer and trip meter 50
. . . . . . . . . . . . . . . . . . . . . .
32Low fuel level warning light 61
. . . . . . . . . . . . . . . . . . . .
33Low tire pressure warning light 61
. . . . . . . . . . . . . . . .
34Fuel gauge 48
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

For detailed information, refer to the description given in each Section\
.
PICTORIAL INDEX
xviiiPage
1Automatic transmission second start
indicator light 355
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2Unengaged “Park” warning light 58
. . . . . . . . . . . . . . .
3Automatic transmission fluid temperature
warning light 58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4Low washer fluid warning light 61
. . . . . . . . . . . . . . . . .
5Automatic transmission indicator lights 349 . . . . . .
6Driver’s seat belt reminder light 54
. . . . . . . . . . . . . . . .
7Turn signal indicator light 32
. . . . . . . . . . . . . . . . . . . . .
8Brake system warning light 53
. . . . . . . . . . . . . . . . . . . .
9Headlight high beam indicator light 32
. . . . . . . . . . . .
10Antilock brake system warning light 57
. . . . . . . . . . .
11Open door warning light 58
. . . . . . . . . . . . . . . . . . . . . . .
12Tachometer 50
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13Tail light indicator light 30
. . . . . . . . . . . . . . . . . . . . . . . .
14Cruise control indicator light 362
. . . . . . . . . . . . . . . .
15Slip indicator light 373, 375, 378, 381
. . . . . . . . . . . . .
16Low engine oil pressure warning light 60
. . . . . . . . . .
17Charging system warning light 59
. . . . . . . . . . . . . . . . .
18Engine coolant temperature gauge 49
. . . . . . . . . . . . . Page
19Malfunction indicator lamp
56
. . . . . . . . . . . . . . . . . . . .
20Vehicle stability control system off
indicator light 376 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21Roll sensing of curtain shield airbags off
indicator light 174. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22Kinetic dynamic suspension system
warning light 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23Center differential lock indicator light 356
. . . . . . . .
24Vehicle stability control system and active
traction control system warning light 59 . . . . . . . . . . .
25Downhill assist control system
indicator light 378. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26Height control indicator lights 370
. . . . . . . . . . . . . . .
27Security indicator light 12, 27
. . . . . . . . . . . . . . . . . . . .
28SRS warning light 55
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
29Trip meter reset knob 50
. . . . . . . . . . . . . . . . . . . . . . . . .
30Odometer and trip meter 50
. . . . . . . . . . . . . . . . . . . . . .
31Low fuel level warning light 61
. . . . . . . . . . . . . . . . . . . .
32Low tire pressure warning light 61
. . . . . . . . . . . . . . . .
33Fuel gauge 48
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

GAUGES, METERS AND SERVICE REMINDER INDICATORS
57
(f) “ABS” Warning Light
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 following systems do not operate, but
the brake system still operates conventionally.
 Anti− lock brake system
 Brake assist system
 Active traction control system
 Vehicle stability control system
 Downhill assist control system
 Hill −start assist control
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 will 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.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
59
(j) “VSC TRAC” Warning Light
This light warns that there is a problem somewhere in the
following.
Vehicle stability control system
 Active traction control system
 Downhill assist control system
 Hill −start assist control
The light will come on when the ignition key turned to “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 lights.
It is normal if they go out after a few seconds.
If the light comes on while driving, the above mentioned
systems do not work. However, as conventional braking
operates when applied, there 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.
When the brake fluid level is too low, the above −mentioned
systems will not operate and the warning light come on.
(k) “KDSS” Warning Light (vehicles with kinetic dynamic suspension system)
This light warns that there is a problem somewhere in the
kinetic dynamic suspension system.
The light will come on when the ignition key is turned to the
“ON” position and will go off after a few seconds.
If the light comes on while driving, bring your vehicle to your
Lexus dealer as soon as possible and have it checked.
(l) Charging System Warning Light
This warning light comes on when the ignition switch is turned
to the “ON” position, and goes off when the engine is started.
When there are problems in the charging system while the
engine is running, the warning light comes on.
NOTICE
When the charging system warning light comes on
while the engine is running, malfunctions such as the
engine drive belt being broken may have occurred. If
the warning light comes on, immediately stop the
vehicle in a safe place and contact your Lexus dealer.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
63
The following service reminder indicator goes off after a few
seconds.
or



The anti−lock brake system warning light, vehicle stability
control system off indicator light and vehicle stability control
system, slip indicator light and active traction control system
warning light may stay on for about 60 seconds after the
ignition key is turned to the “ON” position. It is normal if they
go out after a while.
The following service reminder indicator should come on. It
goes off after about 6 seconds.
If any service reminder indicator or warning buzzer does not
function as described above, have it checked by your Lexus
dealer as soon as possible.
MULTIINFORMATION DISPLAY
13PY018
1“MODE” button2“” button
3“” button4“RESET” button

SECTION 3 – 1
341
STARTING AND DRIVING
Starting and driving
Three−way catalytic converters342
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine exhaust caution 343
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Before starting the engine 344
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition switch 345
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
Parking brake 347
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
How to start the engine 348
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic transmission 349
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Four−wheel drive system 356
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear view monitor system 358
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise control 362
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
Rear height control air suspension 366
. . . . . . . . . . . . . . . . . . . . . . . . .
Electronic modulated suspension 371
. . . . . . . . . . . . . . . . . . . . . . . . . .
Active traction control system 372
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vehicle stability control system 375
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Downhill assist control system 377
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hill −start assist control 380
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake system 383
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
Tire pressure warning system 387
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake pad wear limit indicators 394
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Limited −slip differential 395
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STARTING AND DRIVING
356
FOURWHEEL DRIVE SYSTEM
(a) Fourwheel drive control
Use the fourwheel drive control lever and center
differential lock switch to select the following transfer and
center differential modes.
The “H” and “L” position of the four −wheel drive control lever
provides either lock or unlock mode of the center differential
depending on the center differential lock switch position.
Use the center dif ferential lock system if your wheels get stuck
in a ditch, or when you are driving on a slippery or bumpy
surface. When the center differential is locked, the vehicle
stability control system is automatically turned off and the
center dif ferential lock and “VSC OFF” indicator lights come on
because the function that controls engine performance
interferes with the process of freeing your wheels.
NOTICE
As soon as the center differential lock switch is turned
on, the “VSC OFF” indicator light comes on. After the
wheels are out of the ditch or off the slippery or bumpy
surface, turn the center differential lock switch off.
Make sure the center differential lock indicator light and
vehicle stability control system off indicator light turn
off.
“H” (high speed position, center differential unlocked):
Lever at “H”, center differential lock switch left out
Use this for normal driving on all types of roads, from dry
hard−surfaced roads to wet, icy or snow −covered roads. This
position gives greater economy, quietest ride, least wear and
better vehicle control.
“H” (high speed position, center differential locked): Lever
at “H”, center differential lock switch pushed in
Use this for greater traction when you experience a loss of
power, such as wheel slipping, in the center differential unlock
mode.
“N” (neutral position): Lever at “N”
No power is delivered to the wheels. The vehicle must be
stopped.

STARTING AND DRIVING
357
“L” (low speed position, center differential unlocked):
Lever at “L”, center differential lock switch left out
Use this for maximum power and traction. Use this for climbing
or descending steep hills, off
−road driving, and hard pulling in
sand or mud.
In this mode, the braking feeling that occurs when the wheels
are negotiating a sharp corner is further reduced than in the “L”
(low position, center differential locked) mode.
“L” (low speed position, center differential locked): Lever
at “L”, center differential lock switch pushed in
Use this for maximum power and traction. Use this for hard
pulling in situations the vehicle cannot negotiate even in the “L”
(low speed position, center differential unlocked) mode. Also,
using this mode when driving down steep off −road inclines will
help contribute to increased vehicle stability.
The indicator light tells when the differential lock is engaged.
Note that the differential is not still locked as long as the
indicator light remains off.
When the operation is not completed, the indicator blinks. If the
indicator light does not go off when you push out the center
differential lock switch, drive straight ahead while accelerating
or decelerating, or drive in reverse.
The center differential lock system operation is not completed
within 5 seconds while the cruise control system is set, cancel
the cruise control system. To cancel the cruise control system,
see “Cruise control” on page 362. If the indicator light does not go off when you push out the
center differential lock switch, drive straight ahead while
accelerating or decelerating, or drive in reverse.
See “(b) Shifting procedure” for further instructions.
(b) Shifting procedure
To shift between unlock and lock modes in “H”,
push the
center differential lock switch.
To shift between unlock and lock modes in “L”, push the
center differential lock switch.
To shift between “H” and “L”, stop the vehicle, put the
transmission into “N” and move the four −wheel drive control
lever.
CAUTION
Never move the fourwheel drive control lever if wheels
are slipping. Stop the slipping or spinning before
shifting.

STARTING AND DRIVING
372We recommend you to select the mode

2
for ordinary
driving. The damping effect will be changed automatically to
provide good riding comfort.
When your vehicle is loaded heavily or you are driving in an
unpaved road, the mode
3
or 4
will be recommended. To
provide good vehicle stability, the damping effect will be harder
than for ordinary driving mode.
With the four−wheel drive control lever at “L”, the damping
effect suitable for off −road driving will be provided in any mode.
ACTIVE TRACTION CONTROL
SYSTEM
The active traction control system automatically helps
prevent the spinning of 4 wheels when the vehicle is
started or accelerated on slippery road surfaces.
When the ignition key is turned to “ON”, the system
automatically turns on.
CAUTION
Under certain slippery road conditions, full traction of
the vehicle and power to the 4 wheels cannot be
maintained, even though the traction control system is
in operation. Do not drive the vehicle under any speed
or maneuvering conditions which may cause the
vehicle to lose traction control. In situations where the
road surface is covered with ice or snow, your vehicle
should be fitted with snow tires or tire chains. Always
drive at an appropriate and cautious speed for the
present road conditions.

STARTING AND DRIVING
373
Slip indicator light
Leave the system on during the ordinary driving so that it
can operate when needed.
You may hear a sound in the engine compartment for a few
seconds when the engine is started or just after the vehicle
begins to move. This means that the active traction control
system is in the self−check mode, but does not indicate a
malfunction.
When the active traction control system is operating, the
following conditions occur:
 The system controls the spinning of the 4 wheels. At this
time, the slip indicator light blinks.
 You may feel vibration or noise in your vehicle, caused by
operation of the brakes. This indicates the system is
functioning properly. The slip indicator light comes on for a few seconds when the
ignition key is turned to “ON”. If the indicator light does not
come on when the ignition is turned on, contact your Lexus
dealer.
The brake actuator temperature increase during continuous
operation of the following systems.

Active traction control system
 Vehicle stability control system
 Downhill assist control system
 Hill −start assist control
If the brake actuator temperature becomes too high while any
of the systems is operating, a buzzer will start to sound
intermittently to indicate that the active traction control system
can no longer operate. In this case, immediately stop your
vehicle at a safe place.
If the system continues to operate, the buzzer sound changes
from intermittent to continuous. (The continuous buzzer
sounds for about 3 seconds.) At the time, the slip indicator light
will come on and the active traction control system temporarily
stops operating in order to protect the brake actuator.
(Although the active traction control system does not operate,
there is no problem to continue your driving.) The system will
be automatically restored after a short time and the slip
indicator light goes out.