lane assist Lexus HS250h 2012 Owner's Manual

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HS250h_U_75050U
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1-8. Safety informationCorrect driving posture ............. 107
SRS airbags ..................................... 109
Front passenger occupant classification system .................... 121
Child restraint systems ............... 126
Installing child restraints ............. 130
2-1. Driving procedures Driving the vehicle ........................ 142
Power (ignition) switch ............... 152
EV drive mode ............................... 157
Hybrid transmission ..................... 160
Turn signal lever ............................ 166
Parking brake ................................. 167
Horn.................................................... 168
2-2. Instrument cluster Gauges and meters ..................... 169
Indicators and warning lights ... 173
Multi-information display ............ 177
Head-up display ............................ 183 2-3. Operating the lights and
windshield wipers
Headlight switch .............................. 191
Automatic High Beam ................ 196
Fog light switch ............................. 202
Windshield wipers and washer ........................................... 204
Headlight cleaner switch ............. 211
2-4. Using other driving systems Cruise control ................................ 212
Dynamic radar cruise control............................................. 216
LKA (Lane-Keeping Assist) .... 230
Driving assist systems................. 238
Hill-start assist control ............... 243
Pre-Collision System.................. 245
2-5. Driving information Cargo and luggage ..................... 254
Vehicle load limits........................ 257
Winter driving tips ...................... 258
Trailer towing .................................. 261
Dinghy towing ............................... 262
2When driving

HS250h_U_75050U
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Pictorial indexInstrument panel
Telephone switches *2P. 347
Multi-information
switches
P. 177
Audio remote
control switches
*2P. 322
Cruise control switch∗ P. 212, 216
Vehicle-to-vehicle distance
button
∗ P. 216
LKA (Lane-Keeping Assist)
switch
∗ P. 230
Horn P. 168
Talk switch *2P. 347

When driving2
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HS250h_U_75050U
2-1. Driving proceduresDriving the vehicle.................. 142
Power (ignition) switch .......... 152
EV drive mode.......................... 157
Hybrid transmission ............... 160
Turn signal lever ....................... 166
Parking brake ........................... 167
Horn ............................................ 168
2-2. Instrument cluster Gauges and meters ................ 169
Indicators and warning lights ......................................... 173
Multi-information display ..... 177
Head-up display ...................... 183
2-3. Operating the lights and windshield wipers
Headlight switch....................... 191
Automatic High Beam ........... 196
Fog light switch ...................... 202
Windshield wipers and washer ................................... 204
Headlight cleaner switch....... 211 2-4. Using other driving systems
Cruise control.......................... 212
Dynamic radar cruise control ..................................... 216
LKA (Lane-Keeping Assist) ....... 230
Driving assist systems ........... 238
Hill-start assist control ......... 243
Pre-Collision System ............ 245
2-5. Driving information Cargo and luggage ............... 254
Vehicle load limits .................. 257
Winter driving tips ................. 258
Trailer towing ............................ 261
Dinghy towing......................... 262

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2-2. Instrument cluster
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When driving
HS250h_U_75050U
Display order may vary depending on vehicle condition.
Electronic feature control contentsSetting electronic feature controls
AFS (if equipped)→P. 1 9 3
Intuitive parking assist
(if equipped)Refer to “Navigation System
Owner’s Manual”.
Other contentsDe ta ils
Customization ( →P. 5 8 4 )
Settings of functions such as the
door lock and light illumination time
can be changed
Dynamic radar cruise control
(if equipped) ( →P. 2 1 6 )Automatically displayed when using
the dynamic radar cruise control
LKA (Lane-Keeping Assist)
(if equipped) ( →P. 2 3 0 )Automatically displayed when using
the lane keeping assist
PCS (Pre-Collision System)
(if equipped) ( →P. 2 4 5 , 5 1 3 , 5 1 6 )Automatically displayed if there is a
possibility of collision.

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2-2. Instrument cluster
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When driving
HS250h_U_75050U
• When only a small amount of fuel is remaining, the distance indicator onthe cruising range display is replaced with the message “CRUISING
RANGE LOW FUEL”. ( →P. 5 2 4 )
■Average vehicle speed
Displays the average vehicle speed since the function was reset
The function can be reset by pushing the “ENTER” switch for longer than 1
second when the average vehicle speed is displayed.
■Outside temperature
Displays the outside temperature
■ Tire inflation pressure
Displays inflation pressure of each tire. There is no correlation between
the order of the displayed values and the tire positions.
It may take a few minutes to display the tire inflation pressure after the
“POWER” switch is turned to ON mode. It may also take a few minutes to
display the tire inflation pressure after the inflation pressure has been
adjusted.
■Electronic feature control can be turned on/off when
The “POWER” switch is in ON mode.
■Conditions for ending electronic feature control
In the following situations, the electronic feature control will end:
●The menu switch is pressed
●The radar cruise control is operated (if equipped)
●The lane keeping assist is operated (if equipped)
●Intuitive parking assist starts operating (if equipped)
●No action is performed for some time after the electronic feature control
screen is displayed
●A warning message appears after the electronic feature control screen is dis-
played

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2-2. Instrument cluster
HS250h_U_75050U
■Head-up display contents
In addition to the vehicle speed display (standard display), the follow-
ing information will be displayed:
● Vehicle speed display (standard display)
Displays the vehicle speed.
●Audio display
Displays audio information for approximately 3
seconds when the audio system is operated
●Dynamic radar cruise control (if equipped)
Displays the approach warning message
(→ P. 5 1 6 )
●PCS (Pre-Collision System) (if equipped)
Indicates that there is a possibility of collision.
(→ P. 5 1 6 )
●LKA (Lane-Keeping Assist) (if equipped)
Displays a warning message that alerts the driver of
a deviation from the lane through use of the lane
departure warning function. ( →P. 5 1 6 )

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2-4. Using other driving systems
HS250h_U_75050U
LKA (Lane-Keeping Assist)∗∗
: If equipped
While driving on a freeway or motor highway that has lane markers, this
system recognizes the lanes using a camera as a sensor to assist the driver
with staying in the lane. The LKA system has two functions.
■Lane departure warning function
If the system judges that the vehicle may deviate from its lane, it
alerts the driver using rapid beeping, indications on the multi-infor-
mation display, and a sensory warning
* given via the steering wheel.
*: A slight steering torque is applied for a short period of time in the
direction of the center of the lane.
■ Lane keeping assist function
This function will be active when the vehicle-to-vehicle distance
control mode of the cruise control ( →P. 216) is set with vehicle
speed above approx. 45 mph (approx. 72 km/h) and while the lane
departure warning function is active. When the lane keeping assist
function is active, a slight steering torque will be applied, to help the
driver maintain the vehicle inside the lane.

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2-4. Using other driving systems
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When driving
HS250h_U_75050U
■Turning the LKA system on
The lane departure warning function and lane keeping assist func-
tion will be activated depending on the recognition condition of lane
markers, vehicle speed and the setting of radar cruise control (vehi-
cle-to-vehicle distance control mode).
Press the “LKA” switch to acti-
vate the system.
“LKA” indicator will come on.
Press the switch again to turn
the LKA system off.

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2-4. Using other driving systems
HS250h_U_75050U
■Operating conditions for each function
*1: Vehicle speed is between about 30 and 125 mph (48 and 200 km/h)
*2: Vehicle speed is between about 45 and 112 mph (72 and 180 km/h).
“LKA”
switchCruise control
(vehicle-to-vehicle
distance control mode)Lane departure
warning
function
*1
Lane keeping
assist function*2
On
OffAv a i l a b l eNot available
On
(While cruising in vehi- cle-to-vehicle distance
control mode with the set vehicle speed
approx. 44 mph [approx.
71 km/h] or less)
Av a i l a b l eNot available
On
(While cruising in vehi- cle-to-vehicle distance control mode with the
set vehicle speed
approx. 45 mph [approx. 72 km/h] or more)
Av a i l a b l eAv a i l a b l e

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2-4. Using other driving systems
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When driving
HS250h_U_75050U
Indication on the multi-information displayWhile the LKA system is on, the lane line display and steering wheel dis-
play (in case of lane keeping assist function) are shown on the multi-infor-
mation display to inform that the LKA system is on. Steering wheel display
The lane keeping assist function is
active.
Dynamic radar cruise control
display
Lane line display
When thin lines are shown:
A lane marker is not recognized by
the system, or the LKA system
functions are temporarily can-
celed.
When solid lane lines are shown:
The lane departure warning func-
tion is active.
■Temporary cancellation of the LKA system functions
If any of the following occurs, the LKA system functions will be temporarily can-
celed. The functions will resume after the necessary operating conditions have
returned.
●The turn signal lever is operated.
●The steering wheel is turned as far as necessary to cause the vehicle to change
lanes.
●The brake pedal is depressed.
However, the lane keeping assist function will not resume even after the brake
pedal is released because depressing the brake pedal also cancels the dynamic
radar cruise control. (only lane departure warning function will resume)
●The vehicle speed deviates from the operating range of the LKA system func-
tions.