2012 Lexus HS250h sensor

5
When trouble arises
507
5-2. Steps to take in an emergency
HS250h_U_75050U
■SRS warning light
This warning light system monitors the airbag sensor assembly, front airbag sensors,
side and curtain shield airbag sensors, curtain shield and rear side airbag sensors,
driver’s seat position sensor, driver’s seat belt buckle switch, front passenger occu-
pant classification system (ECU and sensors), “AIR BAG ON” indicator light, “AIR
BAG OFF” indicator light, front passenger’s seat belt buckle switch, seat belt pre-
tensioner assemblies, inflators, interconnecting wiring and power sources. (→P.
109)
■Front passenger detection sensor, passen ger seat belt reminder and warning
buzzer
●If luggage is placed on the front passenger seat, the front passenger detection
sensor may cause the warning light to flash and the warning buzzer to sound
even if a passenger is not sitting in the seat.
●If a cushion is placed on the seat, the sensor may not detect a passenger, and the
warning light may not operate properly.
■Electric power steering system warning light (warning buzzer)
When the 12-volt battery charge becomes insufficient or the voltage temporarily
drops, the electric power steering system warning light may come on and the warn-
ing buzzer may sound.
■If the malfunction indicator lamp comes on while driving
First check the following:
●Is the fuel tank empty?
If it is, fill the fuel tank immediately.
●Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after several driving trips.
If the light does not go off even after several trips, contact your Lexus dealer as soon
as possible.
■When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level. Pushing the tire
pressure warning reset switch will not turn off the tire pressure warning light.

514
5-2. Steps to take in an emergency
HS250h_U_75050U
(If equipped)
Indicates a malfunction in the intuitive parking assistA buzzer also sounds.
The malfunctioning assist-sensor is flashing.
(Flashes)
Indicates a malfunction in the cruise control systemA buzzer also sounds.
Press the “ON-OFF” button once to deactivate the
system, and then press the button again to reactivate
the system.
(Flashes)
(If equipped)
Indicates a malfunction in the radar cruise control
system A buzzer also sounds.
Press the “ON-OFF” button once to deactivate the
system, and then press the button again to reactivate
the system.
Indicates a malfunction in the EPS systemA buzzer also sounds.
If the steering wheel becomes heavier than usual
when operating, hold firmly and operate using more
force than usual.
Wa r n i n g m e s s a g eDetails

518
5-2. Steps to take in an emergency
HS250h_U_75050U
(U.S.A. only)
Indicates that all mainte-
nance is required to cor-
respond to the driven
distance on the mainte-
nance schedule*
1 .Pe r f o r m t h e n e c e s s a r y
maintenance.
Please reset the mainte-
nance data after the main-
tenance is performed
(→ P. 4 2 4 )
Comes on approximately
5000 miles (8000 km)
after the maintenance
data has been reset.
(The indicator will not
work properly unless the
maintenance data has
been reset.)
Indicates that the tire
inflation pressure is lowCheck the tire inflation
pressure, and adjust to the
appropriate level.
(If equipped)
Indicates that the pre-
collision system is not
currently functional
• The grille or the sensor is
dirty.
• The pre-collision system is not functional due to
overheating.
• Check the grille and the sensor and clean them if
they are dirty.
• Check that the system will become functional
after the system cools
down.
Wa r n i n g m e s s a g eDetailsCorrection procedure

5
When trouble arises
519
5-2. Steps to take in an emergency
HS250h_U_75050U
(If equipped)
Indicates that intuitive
parking assist sensor is
dirty or covered with iceA buzzer also sounds.
The site of the malfunc-
tion and the vehicle
image are flashing.
Clean the sensor.
(Flashes)
(If equipped)
Indicates that the radar
cruise control sensor is
dirty or covered with ice A buzzer also sounds.
Clean the sensor.
(Flashes)
(If equipped)
Indicates that the radar
cruise control system is
unable to judge vehicle-
to-vehicle distance A buzzer also sounds.• Switch driving mode to normal.
• Stop the wiper or change the mode to
auto, low or intermittent.
Wa r n i n g m e s s a g eDetailsCorrection procedure

5
When trouble arises
521
5-2. Steps to take in an emergency
HS250h_U_75050U
Indicates that the LKA is
suspendedA buzzer also sounds.
•The camera sensor temperature is higher
than the operation tem-
perature range.
• The power steering system operation is
restricted.
Reactivate the lane keep-
ing assist system.
Alerts the driver that the
vehicle is out of the lanes
(while the LKA system is
operating).
A buzzer also sounds.
The lane markings and/
or the steering wheel
marking flash.
At the same time,
will appear on
the head-up display (the
image flashes).
Check the road condi-
tions and drive the vehicle
at a safe speed.
Indicates that the hybrid
system has overheated A buzzer also sounds.Stop and check.
(→ P. 552)
Wa r n i n g m e s s a g eDetailsCorrection procedure

588
6-2. Customization
HS250h_U_75050U
Wi re le ss
remote con-
trol
(
→P. 5 8 )
Wireless remote
controlOnOff———O
Unlocking oper-
ation
Driver’s
door
unlocked
in one step,
all doors
unlocked
in two
steps
All doors
unlocked
in one step
O—OO
Panic functionOnOff———O
Trunk unlocking
operationPress and
hold
(short)
One short press———O
Press twice———O
Press and
hold
(long)
———O
Off———O
Automatic
light control
system
(
→P. 1 9 1 )
Ti m e e l a p s e d
before the head-
lights turn off30 sec- onds
Off
O—OO
60 sec-
onds
90 sec- onds
Light sensor
sensitivityStandard-2 to 2O—OO
ItemFunctionDefault settingCustom-
ized
setting

590
6-2. Customization
HS250h_U_75050U
Illumination
(
→P. 3 74 )
Outer foot lights
activate on
approach of per-
son carrying
smart key
OnOff———O
Outer foot lights
operation when
the doors are
unlocked
OnOff———O
Remote touch
lightOnOff———O
Meter
(→ P. 1 6 9 )
Sensitivity of the
ambient light
sensor used for
dimming the
meter lights etc.
Standard-2 to 2O——O
Sensitivity of the
ambient light
sensor used for
brightening the
meter lights etc.
Standard-2 to 2O——O
Automatic
air condi-
tioning sys-
tem
(→ P. 266)
Switching
between outside
air and recircu-
lated air mode
linked to
“A U T O ” s w i t c h
operation
AutoManualO——O
ItemFunctionDefault
settingCustom-
ized
setting

593
6-2. Customization
6
Vehicle specifications
HS250h_U_75050U
Driving
position
memory
(Driver’s
seat)
(→ P. 7 2 )Called up when
door is opened
with smart
access system
with push-but-
ton start
Driver’s
doorAll doors———O
Intuitive
parking
assist ∗
Signal (buzzer)
when the dis-
tance to obsta-
cles does not
change for 3
seconds or more
OnOff———O
Signal (buzzer)
when the shift
position is
changed to N
OnOff———O
Active sensors
when the shift
position is out of
P or R
Front
corners
Rear
centers, Rear
corners
———O
Seat belt
reminder
(
→P. 5 0 5 )
Vehicle speed
linked seat belt
reminder buzzer
OnOff———O
Reverse
buzzer
( → P. 1 6 3 )Signal (buzzer)
when the shift
position is in RIntermit-
tentSingle———O
∗ : Refer to "Navigation System Owner's Manual"
ItemFunctionDefault
settingCustom-
ized
setting