2013 Lexus GS300h warning light

1082. Instrument cluster
GS450h_300h_OM_OM30D53E_(EE)
*1: These lights turn on when the power switch is turned to ON mode to indi-
cate that a system check is being performed. They will turn off after the
hybrid system is on, or after a few seconds. There may be a malfunction in
a system if the lights do not come on, or turn off. Have the vehicle
inspected by any authorized Lexus dealer or repairer, or another duly qual-
ified and equipped professional.
*2: The light flashes to indicate that the system is operating.
*3: The light comes on when the system is turned off. The light flashes faster
than usual to indicate that the system is operating.
*4: In order to confirm operation, the BSM outside rear view mirror indicators
illuminate in the following situations:
• When the power switch is turned to ON mode while the BSM main
switch is set to ON.
• When the BSM main switch is set to ON while the power switch is in
ON mode.
If the system is functioning correctly, the BSM outside rear view mirror
indicators will turn off after a few seconds.
If the BSM outside rear view mirror indicators do not illuminate or do not
turn off, there may be a malfunction with the system.
If this occurs, have the vehicle inspected by any authorized Lexus dealer
or repairer, or another duly qualified and equipped professional.
CAUTION
If a safety system warning light does not come on
Should a safety system light such as the ABS and SRS warning light not
come on when you start the hybrid system, this could mean that these sys-
tems are not available to help protect you in an accident, which could result
in death or serious injury. Have the vehicle inspected by any authorized
Lexus dealer or repairer, or another duly qualified and equipped profes-
sional immediately if this occurs.

1202. Instrument cluster
GS450h_300h_OM_OM30D53E_(EE)
System check display
After turning the power switch to ON mode, “SYSTEM CHECK” is dis-
played while system operation is checked.
Outside temperature display
In the following situations, the correct outside temperature may not be dis-
played, or the display may take longer than normal to change.
When stopped, or driving at low speeds (less than 20 km/h [12 mph])
When the outside temperature has changed suddenly (at the entrance/exit of
a garage, tunnel, etc.)
Setting display automatic cancelation
In the following situations, setting display in which the settings can be
changed through the “DISP” button will automatically be turned off.
When a warning message appears while the setting display is displayed
When the vehicle begins to move while the setting display is displayed
Tire inflation pressure (if equipped)
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 dis-
play the tire inflation pressure after inflation pressure has been adjusted.
“---” may be displayed if the tire position information cannot be determined
due to unfavorable radio wave conditions.
Tire inflation pressure changes with temperature. The displayed values may
also be different from the values measured using a tire pressure gauge.
Liquid crystal display
Small spots or light spots may appear on the display. This phenomenon is
characteristic of liquid crystal displays, and there is no problem continuing to
use the display.
Customization
Setting of available languages can be changed. (Customizable features: P.
944)

271
4 4-2. Driving procedures
Driving
GS450h_300h_OM_OM30D53E_(EE)
When there is a malfunction in the system
Warning lights and/or warning message will turn on or flash. (P. 830, 838)
Depending on the condition, the parking brake indicator light may flash.
Usage in winter time
P. 4 3 4
NOTICE
When parking the vehicle
Before you leave the vehicle, set the parking brake, shift the shift lever to P
and make sure that the vehicle does not move.
When the system malfunctions
Stop the vehicle in a safe place and check the warning messages.
When the parking brake cannot be released due to a malfunction
Use the parking brake release tool to manually release the parking brake.
(P. 905)
Driving the vehicle with the parking brake set will lead to brake compo-
nents overheating, which may affect braking performance and increase
brake wear.

2724-2. Driving procedures
GS450h_300h_OM_OM30D53E_(EE)
Brake Hold
Turns the brake hold system on
The brake hold standby indicator
(green) comes on. While the sys-
tem is holding the brake, the brake
hold operated indicator (yellow)
comes on.
Brake hold system operating conditions
The brake hold system cannot be turned on in the following conditions:
The trunk or hood is not closed.
The driver’s door is not closed.
The driver is not wearing the seat belt.
If any of the conditions above are detected when the brake hold system is
enabled, the system will turn off and the brake hold standby indicator light
will go off. In addition, if any of the conditions are detected while the system
is holding the brake, a warning buzzer will sound and a message will be
shown on the multi-information display. The parking brake will then be set
automatically.
Brake hold function
If the brake pedal is left released for a period of about 3 minutes after the
system has started holding the brake, the parking brake will be set automat-
ically. In this case, a warning buzzer sounds and a message is shown on the
multi-information display.
To turn the system off while the system is holding the brake, firmly depress
the brake pedal and press the button again.
The brake hold system keeps the brake applied when the shift lever
is in D, S or N with the system on and the brake pedal has been
depressed to stop the vehicle. The system releases the brake when
the accelerator pedal is depressed with the shift lever in D or S to
allow smooth start off.

2744-2. Driving procedures
GS450h_300h_OM_OM30D53E_(EE)
When the parking brake is set automatically while the system is holding the
brakes
The parking brake will not be released automatically. Release the parking
brake by operating the parking brake switch, making sure that the parking
brake indicator light goes off. (P. 269)
When there is a malfunction in the system
Warning lights and/or warning messages will turn on or flash. (P. 832, 843)
CAUTION
When the vehicle is on a steep incline
When using the brake hold system on a steep incline exercise caution. The
brake hold function may not hold the vehicle in such a situation.
When stopped on a slippery road
The system cannot stop the vehicle when the gripping ability of the tires
has been exceeded. Do not use the system when stopped on a slippery road.
NOTICE
When parking the vehicle
The brake hold system is not designed for use when parking the vehicle for
a long period of time. Turning the power switch off while the system is
holding the brake may release the brake, which would cause the vehicle to
move. When operating the power switch, depress the brake pedal, set the
parking brake and shift the shift lever to P.

3394-5. Using the driving support system
4
Driving
GS450h_300h_OM_OM30D53E_(EE)
Lane departure warning function
If the system judges that the vehicle may deviate from its lane, it
alerts the driver using beeping, screen displays and a sensory
warning
* given via the steering wheel.
*: A slight steering torque is applied for a short period of time in the direc-
tion of the center of the lane.
Lane keeping assist function
• This function will be active when the vehicle-to-vehicle dis-
tance control mode of the cruise control (P. 302) is set with
vehicle speed above approximately 72 km/h (45 mph) and
while the lane departure warning function is active.
• When the lane keeping assist function is active, a slight steer-
ing torque will be applied, to help the driver maintain the vehi-
cle inside the lane.
The lane keeping assist function will be temporarily canceled if the
steering wheel is not operated, or if you continue driving with your
hands lightly touching the steering wheel. (P. 343)
Functions included in the LKA
1
2

3434-5. Using the driving support system
4
Driving
GS450h_300h_OM_OM30D53E_(EE)
Temporary cancelation of the LKA system functions
If any of the following occurs, the LKA system functions will be temporarily
canceled. The functions will resume after the necessary operating conditions
have returned.
The steering wheel is turned as far as necessary to cause the vehicle to
change lanes.
When the system detects no-handed driving. (The lane keeping assist func-
tion will be temporarily canceled, but the lane departure warning function
will continue.)
The turn signal lever is operated.
The vehicle speed deviates from the operating range of the LKA system
functions. (The buzzer will beep twice when the lane keeping assist func-
tion is being canceled.)
When the lane lines cannot be recognized while driving. (The buzzer will
beep twice when the lane keeping assist function is being canceled.)
The wiper switch is set on high speed mode or is set on AUTO mode with
wipers operating at high speed. (The lane keeping assist function will be
temporarily canceled, but the lane departure warning function will con-
tinue.)
If the vehicle crosses a line for approximately half a minute or more. (The
lane keeping assist function will be temporarily canceled, but the lane
departure warning function will continue.)
When the lane departure warning function is activated.
The lane departure warning function will not operate again for a several
seconds after it has been activated, even if the vehicle leaves the lane again.
The lane departure warning
It may be difficult to feel the sensory warning depending on the road condi-
tions.
No-handed driving warning
If the steering wheel is not operated for approximately 15 seconds on a
straight road or approximately 5 seconds on a curve, the buzzer will beep
twice, indicators on the multi-information display will flash, and the lane
keeping assist function will be temporarily canceled. If you drive the vehicle
with your hands lightly touching the steering wheel, this may also be
detected as no-handed driving.

3444-5. Using the driving support system
GS450h_300h_OM_OM30D53E_(EE)
After the vehicle has been parked in the sun
The LKA system functions may not be available and a warning message
(P. 854) will be displayed for a while after driving has started. In such
cases, turn the LKA 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 (P. 338) becomes suitable for its operation, the
functions will begin to operate.
If there are lane markers on only one side of the vehicle
The lane keeping assist function will not operate. Also, the lane departure
warning will not operate for the side on which lane markers could not be rec-
ognized.
Conditions in which the function may not operate correctly
In the following conditions, the LKA system functions may not operate, or it
may not be possible to ensure adequate performance. Also, the camera sensor
may be unable to recognize lane lines causing the lane departure warning
function to operate incorrectly, or the lane keeping assist function may not
operate properly. However, this does not indicate a malfunction.
When driving through an area with no lane markers, such as a tollbooth, a
crossing or before a ticket checkpoint
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 yellow (These may be more difficult for the sys-
tem to recognize compared to white markers.)
When the lane markers are broken, “Raised pavement marker” or stones
When lane markers are obscured or partially obscured by sand, dirt, etc.
When there are shadows on the road running parallel with lane markers, or
if a shadow covers the lane markers
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