lights Lexus GX460 2012 Service Manual

239
2-3. Operating the lights and windshield wipers
2
When driving
GX460_U.S.A. (OM60J00U)
■The windshield wipers and washer can be operated when
The “ENGINE START STOP” switch is in IGNITION ON mode.
■Rain drop sensor
●If the wiper switch is turned to the “AUTO” position while the “ENGINE START
STOP” switch is in IGNITION ON mode, the wipers will operate once to show
that “AUTO” mode is activated.
●If the temperature of the rain drop sensor is 194 °F (90 °C) or higher, or 5 °F
(-15 °C) or lower, the automatic operation may not occur. In this case, operate
the wipers in any mode other than “AUTO”.
Washer/wiper dual operation
The wipers operate automati-
cally. (After operating several
times, the wipers operate one
more time after a short delay to
prevent dripping.)
Vehicles with the headlight
cleaners: If the headlights are
on, the headlight cleaners will
operate once.
●The raindrop sensor judges the amount of
raindrops.
An optical sensor is adopted. It may not
operate properly when sunlight from the
rising or setting of the sun intermittently
strikes the windshield, or if bugs etc. are
present on the windshield.

240
2-3. Operating the lights and windshield wipers
GX460_U.S.A. (OM60J00U)
■Effects of vehicle speed on wiper operation
With the settings other than “AUTO” also, the time until drip prevention wiper
sweep occurs is changed depending on vehicle speed.
Ty p e A
With selected, wiper operation will be switched from low speed to intermit-
tent wiper operation only when the vehicle is stationary. (However, when the sensor
sensitivity is adjusted to the highest level, the mode cannot be switched.)
Ty p e B
With selected, wiper operation will be switched from low speed to intermit-
tent wiper operation only when the vehicle is stationary. (However, when the sensor
sensitivity is adjusted to the highest level, the mode cannot be switched.)
■If no windshield washer fluid sprays
Check that the washer nozzles are not blocked if there is washer fluid in the wind-
shield washer fluid reservoir.
CAUTION
■Caution regarding the use of windshield wipers in “AUTO” mode
The windshield wipers may operate unexpectedly if the sensor is touched or the
windshield is subject to vibration in “AUTO” mode. Take care that your fingers etc.
anything else does not become caught in the windshield wipers.

241
2-3. Operating the lights and windshield wipers
2
When driving
GX460_U.S.A. (OM60J00U)
NOTICE
■When the windshield is dry
Do not use the wipers, as they may damage the windshield.
■When the washer fluid tank is empty
Do not operate the switch continually as the washer fluid pump may overheat.
■When there is no washer fluid spray from the nozzle
Damage to the washer fluid pump may be caused if the lever is pulled toward you
and held continually.
■When a nozzle becomes blocked
Do not try to clear it with a pin or other object. The nozzle will be damaged.

242
2-3. Operating the lights and windshield wipers
GX460_U.S.A. (OM60J00U)
Rear window wiper and washer
The wiper operation is selected by moving the lever as follows:
Ty p e AOff
Intermittent window
wiper operation
Normal window
wiper operation
Washer/wiper dual
operation
Washer/wiper dual
operation

243
2-3. Operating the lights and windshield wipers
2
When driving
GX460_U.S.A. (OM60J00U)
Ty p e BOff
Intermittent window
wiper operation
Normal window
wiper operation
Washer/wiper dual
operation
Washer/wiper dual
operation

244
2-3. Operating the lights and windshield wipers
GX460_U.S.A. (OM60J00U)
■The rear window wiper and washer can be operated when
●The “ENGINE START STOP” switch is in IGNITION ON mode.
●The glass hatch is closed.
■If no windshield washer fluid sprays
Check that the washer nozzles are not blocked if there is washer fluid in the wind-
shield washer fluid reservoir.
NOTICE
■When the rear window is dry
Do not use the wiper, as it may damage the rear window.
■When the washer fluid tank is empty
Do not operate the switch continually as the washer fluid pump may overheat.

245
2-3. Operating the lights and windshield wipers
2
When driving
GX460_U.S.A. (OM60J00U)
Headlight cleaner switch∗
∗: If equipped
■The headlight cleaners can be operated when
The “ENGINE START STOP” switch is in IGNITION ON mode and the headlight
switch is turned on.
■Windshield washer linked operation
When the windshield washer is operated with the “ENGINE START STOP” switch
in IGNITION ON mode and the headlights on, the headlight cleaners will operate
once. ( →P. 2 3 6 )
NOTICE
■When the washer fluid tank is empty
Do not press the switch continually as the washer fluid pump may overheat.
Washer fluid can be sprayed on the headlights.
Press the switch to clean the
headlights.

260
2-4. Using other driving systems
GX460_U.S.A. (OM60J00U)
■Automatic cancelation of constant speed control
The cruise control will stop maintaining the vehicle speed in the following situations:
●Actual vehicle speed is more than approximately 10 mph (16 km/h) below the
set vehicle speed.
At this time, the memorized set speed is not retained.
●Actual vehicle speed falls below approximately 25 mph (40 km/h).
●VSC is activated.
●The center differential lock/unlock is not completed within 5 seconds while the
dynamic radar cruise control system is on.
■Radar sensor and grille cover
Always keep the sensor and grille cover clean to ensure that the vehicle-to-vehicle
distance control operates properly. (Some obstructions, such as snow, ice or plastic
objects, cannot be detected by the obstruction sensor.)
Dynamic radar cruise control is canceled if an obstruction is detected.
■Warning lights and messages for dynamic radar cruise control
Warning lights and messages are used to indicate a system malfunction or to inform
the driver of the need for caution while driving. (→P. 700)
Grille cover
Radar sensor

277
2-4. Using other driving systems
2
When driving
GX460_U.S.A. (OM60J00U)
■When the vehicle has been parked in the sun
The LDA system may not be available for a while after driving has started. In such
cases, turn the LDA system off and turn it on again after normal temperature
returns. When the temperature in the cabin decreases and the temperature around
the camera sensor becomes suitable for its operation, the functions will begin to
operate.
■Warning lights and messages for LDA
Warning lights and messages are used to indicate a system malfunction or to inform
the driver of the need for caution while driving. (→P. 700)
CAUTION
■Before using the LDA system
This system provides information to the driver in accordance with the road geome-
try and the driving conditions. Be aware of your surroundings at all times, correct
the driving path while driving appropriately and be responsible for your own safety.
This system operates by using the camera to identify lane markers when the LDA
switch is on and the vehicle is being driven at the system operating speed.
Operation may be temporarily suspended if the camera cannot recognize the lane
markers or if the system cannot operate due to the road environment or driving
conditions. Also, since an alarm may sound unnecessarily if the lane markers cannot
be correctly identified, make sure to drive responsibly even while the system is
operating.
If a malfunction occurs in the system, the driver will be alerted by a buzzer and a dis-
play, and LDA operation will be temporarily suspended. However, this does not
present a problem to normal driving.
If the alert is displayed even after restarting the engine, have your vehicle inspected
by your Lexus dealer.

279
2-4. Using other driving systems
2
When driving
GX460_U.S.A. (OM60J00U)
NOTICE
■In the following situations, the LDA will not work, or will not perform reliably
●When the lane markers are interrupted or are not present, such as before a toll-
booth.
●When the lane markers are only on one side of the road.
●When driving on a sharp curve.
●When lanes are extremely narrow or extremely wide.
●When the vehicle leans to one side an unusual amount due to a heavy load or
improper tire inflation pressure.
●When the following distance between your vehicle and the vehicle ahead is
extremely short.
●When the lane markers are broken or when “Botts’ dots” or “Raised pavement
markers” can be seen.
●When the lane markers are obscured or partially obscured by sand, dirt, etc.
●When driving on a particularly bright road surface, such as concrete.
●When driving on a road surface that is bright due to reflected light.
●When driving in a location where the light level changes rapidly, such as the
entrance to or exit from a tunnel.
●When sunlight or the headlights of oncoming vehicles are shining directly into the
camera lens.
●When pavement lane markers are difficult to see due to rain, snow, fog, etc.
●When driving on a road surface that is wet due to rain, standing water, etc.
●When the vehicle experiences strong up-and-down motion such as when driving
on an extremely rough road or on a seam in the pavement.
●When driving on roads that are branching or merging.
●When headlight brightness is reduced due to dirt on the lenses, or when the
headlights are misaligned.