2012 Lexus GX460 sensor

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1-7. Safety information
1
Before driving
GX460_U.S.A. (OM60J00U)Your vehicle is equipped with ADVANCED AIRBAGS designed based
on the US motor vehicle safety standards (FMVSS208). The airbag sys-
tem controls airbag deployment power for the driver and front passen-
ger. The driver airbag system consists of the driver’s seat belt buckle
switch etc. The front passenger’s airbag system consists of the front pas-
senger occupant classification sensor etc.
The main SRS airbag system components are shown above. The SRS air-
bag system is controlled by the airbag sensor assembly. The airbag sen-
sor assembly consists of a safing sensor and a main sensor.
In certain types of severe frontal or side impacts or a vehicle rollover, the
SRS airbag system triggers the airbag inflators. A chemical reaction in
the inflators quickly fills the airbags with non-toxic gas to help restrain the
motion of the occupants.

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2-2. Instrument cluster
2
When driving
GX460_U.S.A. (OM60J00U)
■The meters and display illuminate when
The “ENGINE START STOP” switch is in IGNITION ON mode.
■Instrument cluster brightness adjustment
The instrument cluster brightness levels when the tail lights are on and off can be
adjusted.
■The brightness of the instrument cluster lights
When the tail lights are on, the brightness will change. However, when the sur-
roundings are bright (daytime, etc.) turning on the tail lights will not change the
instrument cluster brightness.
In addition, the brightness of the instrument cluster lights is automatically adjusted
based on the light sensor detecting how bright the surroundings are.
■When disconnecting and reconnecting battery terminals
The trip meter data will be reset.
If the trip meter was displayed last, the ODO screen will be displayed after reset-
ting.
■Customization
Setting of sensitivity of the ambient light sensor used for dimming the meter lights
can be changed. (Customizable features →P. 7 8 2 )
NOTICE
■To prevent damage to the engine and its components
●Do not let the indicator needle of the tachometer enter the red zone, which indi-
cates the maximum engine speed.
●The engine may be overheating if the engine coolant temperature gauge is in the
red zone (H). In this case, immediately stop the vehicle in a safe place, and check
the engine after it has cooled completely. ( →P. 74 4 )

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2-3. Operating the lights and windshield wipers
GX460_U.S.A. (OM60J00U)
■Daytime running light system
●To make your vehicle more visible to other drivers, the headlights turn on auto-
matically (at a reduced intensity) whenever the engine is started and the parking
brake is released. Daytime running lights are not designed for use at night.
For the U.S.A.: Daytime running lights can be turned off by operating the switch.
●Compared to the headlights, the daytime running light system offers greater
durability and consumes less electricity, so it can help fuel economy.
■Headlight control sensor
■Automatic light off system
●When only the tail lights come on: The parking/front side marker, tail, license
plate and fog lights turn off if the “ENGINE START STOP” switch is turned to
ACCESSORY mode or turned off and the driver’s door is opened.
●When the headlights come on: The headlights, parking/front side marker, tail,
license plate and fog lights turn off 30 seconds after a door or the glass hatch is
opened and closed. (The lights turn off immediately if on the key is
pressed after all the doors are locked.)
To turn the lights on again, turn the “ENGINE START STOP” switch to IGNITION
ON mode, or turn the light switch off once and then back to
or .
The sensor may not function properly if an
object is placed on the sensor, or anything
that blocks the sensor is affixed to the wind-
shield.
Doing so interferes with the sensor detecting
the level of ambient light and may cause the
automatic headlight system to malfunction.

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2-3. Operating the lights and windshield wipers
2
When driving
GX460_U.S.A. (OM60J00U)
■Automatic headlight leveling system (if equipped)
The level of the headlights is automatically adjusted according to the number of
passengers and the loading condition of the vehicle to ensure that the headlights do
not interfere with other road users.
■If the “AFS OFF” indicator flashes (if equipped)
It may indicate a malfunction in the system. Contact your Lexus dealer.
■Customization
Settings (e.g. light sensor sensitivity) can be changed.
(Customizable features: →P. 7 8 2 )
NOTICE
■To prevent battery discharge
Do not leave the lights on longer than necessary when the engine is not running.

226
2-3. Operating the lights and windshield wipers
GX460_U.S.A. (OM60J00U)
Automatic High Beam∗
∗: If equipped
The Automatic High Beam uses an in-vehicle camera sensor to assess the
brightness of streetlights, the lights of oncoming and preceding vehicles,
etc., and automatically turns high beam on or off as necessary.
■ Activating the Automatic High Beam system
Turn the headlight switch to the
“AUTO” position.
Push the lever away from you.
The Automatic High Beam indi-
cator will come on when the
headlights are turned on auto-
matically to indicate that the sys-
tem is active.
STEP1
STEP2

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2-3. Operating the lights and windshield wipers
2
When driving
GX460_U.S.A. (OM60J00U)
■Limitations of the Automatic High Beam
Do not rely on the Automatic High Beam. Always drive safely, taking care to
observe your surroundings and turning high beam on or off manually if necessary.
■Camera sensor detection information
●High beam may not be automatically turned off in the following situations:
• When oncoming vehicles suddenly appear from a curve.
• When another vehicle cuts across in front of you.
●High beam may be turned off if an oncoming vehicle that is using fog lights with-
out using the headlights is detected.
●Houselights, streetlights, red traffic signals, and illuminated billboards or signs
may cause the high beam to turn off.
●The following factors may affect the amount of time taken to turn high beam on
or off:
• The brightness of headlights, fog lights, and tail lights of oncoming and pre-ceding vehicles
• Road conditions (wetness, ice, snow etc.)
• The number of passengers and amount of baggage
●High beam may be turned on or off when unexpected by the driver.

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2-3. Operating the lights and windshield wipers
GX460_U.S.A. (OM60J00U)
●In the situations below, the system may not be able to correctly detect the sur-
rounding brightness levels, and may flash or expose nearby pedestrians to the
high beam. Therefore, you should consider turning the high beam on or off
manually rather than relying on the Automatic High Beam system.
• In bad weather (rain, snow, fog, sandstorms etc.)
• The windshield is obscured by fog, mist, ice, dirt etc.
• The windshield is cracked or damaged.
• The inside rear view mirror or camera sensor is deformed or dirty.
• Surrounding brightness levels are equal to those of headlights, tail lights orfog lights.
• Vehicles ahead have headlights that are either switched off, dirty, are chang-
ing color, or are not aimed properly.
• When driving through an area of intermittently changing brightness and darkness
• When frequently and repeatedly driving ascending/descending roads, or roads with rough, bumpy or uneven surfaces (such as stone-paved roads,
gravel tracks etc.)
• When frequently and repeatedly taking curves or driving on a winding road
• There is a highly reflective object ahead of the vehicle, such as a sign or a mir- ror.
• The vehicle’s headlights are damaged or dirty.
• The vehicle is listing or tilting, due to a flat tire, a trailer being towed etc.
• The Automatic High Beam indicator is flashing.
• The high beam and low beam are repeatedly being switched between in an abnormal manner.
• The driver believes that the high beam may be causing problems or distress to other drivers or pedestrians nearby.

231
2-3. Operating the lights and windshield wipers
2
When driving
GX460_U.S.A. (OM60J00U)
■If the Automatic High Beam indicator flashes...
It may indicate a malfunction in the system. Contact your Lexus dealer.
■Temporary lowering sensor sensitivity
The sensitivity of the sensor can be temporarily lowered.
To lower the sensitivity, push and hold the “AUTO” button on the inside rear view
mirror for 15 to 20 seconds, and release. The indicator light on the inside rear view
mirror will flash to indicate that the sensitivity has been lowered.
When the “ENGINE START STOP” switch is turned off, the sensitivity will be
returned to its normal level.
■Customization that can be configured at your Lexus dealer
The Automatic High Beam can be turned off.