light Lexus GS450h 2009 Repair Manual

173
2-3. Operating the lights and windshield wipers
2
When driving
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
Windshield wipers and washer
Intermittent wiper with interval adjuster
Wiper intervals can be adjusted for intermittent operation (when is selected).
Off
Intermittent wind-
shield wiper operation
Low speed windshield
wiper operation
High speed windshield
wiper operation
Temporary operation
Increases the intermittent
windshield wiper frequency
Decreases the intermittent
windshield wiper frequency
GS450h_HV_U.book Page 173 Monday, April 27, 2009 10:10 AM

174
2-3. Operating the lights and windshield wipers
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
Washer/wiper dual operation
Wipers will automatically oper-
ate a couple of times after the
washer squirts.
Rain-sensing windshield wipers
With selected, the wipers will operate automatically when the
sensor detects falling rain. The system automatically adjusts wiper
timing in accordance with rain volume and vehicle speed.Off
Rain-sensing wiper
operation
Low speed wiper
operation
High speed wiper
operation
Temporary operation
GS450h_HV_U.book Page 174 Monday, April 27, 2009 10:10 AM

175
2-3. Operating the lights and windshield wipers
2
When driving
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
■The windshield wiper and washer can be operated when
The “POWER” switch is in ON mode.
■Dripping prevention wiper sweep
After washing and wiping operation several times, the wipers operate one more
time after a short delay to prevent dripping.
However, the last sweep will not happen if the vehicle is traveling above 106 mph
(170 km/h).
■Effects of vehicle speed on wiper operation
Vehicle speed affects the following even when the wipers are not “AUTO” mode.
●Intermittent wiper interval ( mode)
●Wiper operation when the washer is being used (delay until drip prevention
wiper sweep occurs)
With selected, wiper operation will be switched from low speed to intermit-
tent wiper operation only when the vehicle is stationary.
Sensor sensitivity (high)
Sensor sensitivity (low)
Washer/wiper dual operation
Wipers will automatically oper-
ate a couple of times after the
washer squirts.
GS450h_HV_U.book Page 175 Monday, April 27, 2009 10:10 AM

176
2-3. Operating the lights and windshield wipers
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
■Rain drop sensor (vehicles equipped with rain-sensing windshield wipers)
■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.
■If the components get extremely hot or cold
The system will turn off if the components get extremely hot (more than 194°F
[90 °C]) or cold (less than -22 °F [-30 °C]).
■Customization that can be configured at Lexus dealer
Settings (e.g. drip prevention function) can be changed.
(Customizable features →P. 5 9 3 ) The sensor judges the amount of raindrops.
GS450h_HV_U.book Page 176 Monday, April 27, 2009 10:10 AM

177
2-3. Operating the lights and windshield wipers
2
When driving
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
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 or
anything else do not become caught in the windshield wipers.
NOTICE
■When the windshield is dry
Do not use the wipers, as they may damage the windshield.
■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.
GS450h_HV_U.book Page 177 Monday, April 27, 2009 10:10 AM

178
2-3. Operating the lights and windshield wipers
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
Headlight cleaner switch∗
■The headlight cleaner can be operated when
The “POWER” switch is in ON mode and the headlight switch is turned ON.
NOTICE
■When the washer fluid tank is empty
Do not press the switch continually, as the washer fluid pump may overheat.
∗: If equipped
Washer fluid can be sprayed on the headlights.
Press the switch to clean the
headlights.
GS450h_HV_U.book Page 178 Monday, April 27, 2009 10:10 AM

180
2-4. Using other driving systems
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
■Adjusting the speed setting
Increase speed
Decrease speed
Hold the lever until the desired
speed setting is obtained.
Fine adjustment of the set speed
can be made by lightly pressing
the lever up or down and releas-
ing it.
■Canceling and resuming regular acceleration
Cancel
Pull the lever towards you to
cancel cruise control.
The setting is also canceled
when the brake pedal is
depressed.
Resume
To resume cruise control and
return to the set speed, push the
lever up.
GS450h_HV_U.book Page 180 Monday, April 27, 2009 10:10 AM

182
2-4. Using other driving systems
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
■If the cruise control indicator light flashes
Press the “ON-OFF” button off once, and then reactivate the system.
If the cruise control speed cannot be set or if the cruise control cancels immediately
after being activated, there may be a malfunction in the cruise control system. Have
the vehicle inspected by your Lexus dealer.
CAUTION
■To avoid operating the cruise control by mistake
Keep the “ON-OFF” button off when not in use.
■Situations unsuitable for cruise control
Do not use cruise control in any of the following situations.
Doing so may result in control of the vehicle being lost and could cause an accident
resulting in death or serious injury.
●In heavy traffic
●On roads with sharp bends
●On slippery roads, such as those covered with rain, ice or snow
●On steep hills
Vehicle speed may exceed the set speed when driving down a steep hill.
●On winding roads
GS450h_HV_U.book Page 182 Monday, April 27, 2009 10:10 AM

185
2-4. Using other driving systems
2
When driving
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
■Selecting conventional cons tant speed control mode
Press the “ON-OFF” button
to activate the cruise control.
Press the button once more to
deactivate the cruise control.
Switch to constant speed
control mode.
(Push the lever away from
you and hold for approxi-
mately 1 second.)
Vehicle-to-vehicle distance con-
trol mode is always reset when
the “POWER” switch is
switched to ON mode.
■Adjusting the speed setting
Increase speed
Decrease speed
Hold the lever until the desired
speed setting is displayed.
In the constant speed control
mode, fine adjustment of the set
speed can be made by lightly
pressing the lever up or down
and releasing it.
GS450h_HV_U.book Page 185 Monday, April 27, 2009 10:10 AM

188
2-4. Using other driving systems
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
Example of follow-up cruising
When following a vehicle driving slower than the set speed
The system continues follow-up cruising while adjusting for changes in the
speed of the vehicle ahead in order to maintain the vehicle-to-vehicle dis-
tance set by the driver.
Example of acceleration
When there are no longer vehicles driving slower than the set speed in
the lane ahead
When the vehicle ahead of you executes a lane change, the system slowly
accelerates until the set vehicle speed is reached. The system then returns to
fixed speed cruising.
Approach warningWhen your vehicle is too close to a vehicle ahead, and sufficient auto-
matic deceleration via the cruise control is not possible, the display will
flash and a buzzer will sound to alert the driver. An example of this would
be if another driver cuts in front of you while you are following a vehicle.
Apply the brakes to ensure an appropriate vehicle-to-vehicle distance.
■Warning lights and messages for dynamic radar cruise control
Warning lights, messages and buzzers are used to indicate a system malfunction or
to inform the driver of the need for caution while driving. ( →P. 5 2 1 )
■Switching modes
The mode cannot be switched to constant speed control mode if vehicle-to-vehicle
distance control mode has been used. The mode also cannot be switched from
constant speed control to vehicle-to-vehic le control mode. Turn the system off by
pressing the “ON-OFF” button, and turn it on again.
GS450h_HV_U.book Page 188 Monday, April 27, 2009 10:10 AM