2013 Lexus GS350 heating

GS350_U (OM30C34U)
812. Instrument cluster
2
Instrument cluster
■The meters and display illuminate when
The engine switch is in IGNITION ON mode.
■Instrument panel brightness adjustment
The instrument panel brightness levels when the tail lights are on and off can be
adjusted individually. However, when the surroundings are bright (daytime, etc.),
turning on the tail lights will not change the instrument panel brightness. At this time,
any adjustments made to the instrument panel brightness levels will be applied to
both settings at once.
■Limitation of brightness adjustment
The brightness of the instrument panel lights is automatically adjusted based on the
light sensor detecting how bright the surroundings are. However, if the instrument
panel brightness has been manually set to either the brightest or darkest setting, the
automatic adjustment will not be performed.
■ECO lamp and SPORT lamp
●When sport mode is selected, SPORT lamp (red) will illuminate.
●When all of the following conditions are satisfied and Eco-friendly driving, ECO
lamp (blue) will illuminate. (ECO lamp will become brighter the more Eco-friendly
driving you perform. Also, while the acceleration exceeds Zone of Eco driving,
ECO lamp turns off. (→P. 88) However, when Eco drive mode is selected, while
the acceleration exceeds Zone of Eco driving, ECO lamp does not turn off.):
• Driving with the shift lever in D
• Paddle shift switch is not operated.
• Either normal mode or Eco drive mode is selected.
• The vehicle speed is approximately 80 mph (130 km/h) or below.
■Customization
Settings (e.g. on/off operation of ECO lamp) can be changed.
(Customizable features →P. 777)
NOTICE
■To prevent damage to the engine and its components
●Do not let the indicator needle of the tachometer enter the red zone, which indi-
cates the maximum engine speed.
●The engine may be overheating if the engine coolant temperature gauge is in the
red zone (H). In this case, immediately stop the vehicle in a safe place, and check
the engine after it has cooled completely. ( →P. 74 7 )

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GS350_U (OM30C34U)
4-1. Before driving
CAUTION
■When taking a nap in the vehicle
Always turn the engine off. Otherwise, if you accidentally move the shift lever or
depress the accelerator pedal, this could cause an accident or fire due to engine
overheating. Additionally, if the vehicle is parked in a poorly ventilated area,
exhaust gases may collect and enter the vehicle, leading to death or a serious
health hazard.
■When braking
●When the brakes are wet, drive more cautiously.
Braking distance increases when the brakes are wet, and this may cause one side
of the vehicle to brake differently than the other side. Also, the parking brake may
not securely hold the vehicle.
●If the power brake assist function does not operate, do not follow other vehicles
closely and avoid hills or sharp turns that require braking.
In this case, braking is still possible, but the brake pedal should be depressed
more firmly than usual. Also, the braking distance will increase.
●The brake system consists of 2 individual hydraulic systems; if one of the systems
fails, the other will still operate. In this case, the brake pedal should be depressed
more firmly than usual and the braking distance will increase.
If this happens, do not continue to drive the vehicle. Have your brakes fixed
immediately.
■If the vehicle becomes stuck
Do not spin the wheels excessively when any of the tires is up in the air, or the vehi-
cle is stuck in sand, mud, etc. This may damage the driveline components or propel
the vehicle forward or backward, causing an accident.

GS350_U (OM30C34U)
1754-2. Driving procedures
4
Driving
■When the steering lock cannot be released
■Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, the motor may be suspended if
the engine is turned on and off repeatedly in a short period of time. In this case,
refrain from operating the engine. After about 10 seconds, the steering lock motor
will resume functioning.
■When “Check Access System with Elec. Key” will be displayed on the multi-infor-
mation display
The system may be malfunctioning. Have the vehicle inspected by your Lexus dealer
immediately.
■If the electronic key battery is depleted
→P. 6 4 6
■Operation of the engine switch
●When operating the engine switch, one short, firm press is enough. If the switch is
pressed improperly, the engine may not start or the engine switch mode may not
change. It is not necessary to press and hold the switch.
●If attempting to restart the engine immediately after turning the engine switch off,
the engine may not start in some cases. After turning the engine switch off, please
wait a few seconds before restarting the engine.
■If the smart access system with push-button start has been deactivated in a cus-
tomized setting
→P. 74 0
“Steering Lock active” will be displayed on
the multi-information display.
Check that the shift lever is set in P. Press the
engine switch while turning the steering
wheel left and right.

GS350_U (OM30C34U)
1874-2. Driving procedures
4
Driving
The parking brake is set or released automatically according to shift lever
operation.
Turns automatic mode on/off
●When the shift lever is moved out
of P, the parking brake will be
released.
●When the shift lever is moved into
P, the parking brake will be set.
Operate the shift lever with the brake
pedal depressed.
■Parking brake operation
●When the engine switch is not in IGNITION ON mode, the parking brake cannot
be released using the parking brake switch.
●When the engine switch is not in IGNITION ON mode, automatic mode (auto-
matic brake setting and releasing) is not available.
●If the parking brake is operated repeatedly over a short period of time, the system
may restrict operation to prevent overheating. If this happens, refrain from operat-
ing the parking brake. Normal operation will return after about 1 minute.
■Parking brake operation sound
When the parking brake operates, a motor sound (whirring sound) may be heard.
This does not indicate a malfunction.
■Parking brake indicator light
●Depending on the engine switch mode, the parking brake indicator light will come
on and stay on as described below:
IGNITION ON mode: Comes on until the parking brake is released.
Not in IGNITION ON mode: Stays on for approximately 15 seconds.
●When the engine switch is turned off with the parking brake set, the parking brake
indicator light will stay on for about 15 seconds. This does not indicate a malfunc-
tion.
Automatic mode

188
GS350_U (OM30C34U)
4-2. Driving procedures
■When there is a malfunction in the system
Warning lights and/or warning message will turn on or flash. (→P. 688, 701)
Depending on the condition, the parking brake indicator light may flash.
■Usage in winter time
→ P. 299
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. 7 3 8 )
Driving the vehicle with the parking brake set will lead to brake components over-
heating, which may affect braking performance and increase brake wear.

GS350_U (OM30C34U)
2674-5. Using the driving support systems
4
Driving
■Operation of the air conditioning system in Eco drive mode
Eco drive mode controls the heating/cooling operations and fan speed of the air
conditioning system to enhance fuel efficiency. To improve air conditioning perfor-
mance, adjust the fan speed or turn off Eco drive mode. ( →P. 3 4 5 )
■Automatic operation of the seat heater during Eco drive mode
If the driving mode select switch is switched to Eco drive mode in cold temperatures,
the seat heater will be automatically operated to assist heating performance.
■Sport mode automatic deactivation
Sport mode is automatically deactivated if the engine switch is turned off after driv-
ing in sport mode.

GS350_U (OM30C34U)
5695-7. Other interior features
5
Interior features
Blows air from the seatHi
Mid
Lo
Off
The indicator light (green) on the
switch and the level indicator lights
(green) come on.
■The seat heaters/seat ventilators can be used when
The engine switch is in IGNITION ON mode.
■The seat heater timer control
The seat heater automatically switches from Hi → Mid → Lo → Off. The switching
timing differs depending on the temperature inside the cabin etc. when the seat
heater was operated.
■Automatic operation of the seat heater during Eco drive mode
If the driving mode select switch is switched to Eco drive mode in cold temperatures,
the seat heater may be automatically operated to assist heating performance.
■Button lock function (vehicles with rear control panel)
To prevent inadvertent operation, some buttons on the rear armrest can be locked.
( → P. 3 6 4 )
■Rear control panel illumination off function (vehicles with rear control panel)
Control panel illumination on the rear armrest can be turned off. ( →P. 3 6 4 )
Seat ventilators (front seats only)
1
2
13
4

570
GS350_U (OM30C34U)
5-7. Other interior features
CAUTION
■Burns
●Use caution when seating the following persons in a seat with the seat heater on
to avoid the possibility of burns:
• Babies, small children, the elderly, the sick and the physically challenged
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sleeping drugs,cold remedies, etc.)
●Do not cover the seat with anything when using the seat heater.
Using the seat heater with a blanket or cushion increases the temperature of the
seat and may lead to overheating.
●Do not use seat heater more than necessary. Doing so may cause minor burns or
overheating.
NOTICE
■To prevent damage to the seat heaters/seat ventilators
Do not put heavy objects that have an uneven surface on the seat and do not stick
sharp objects (needles, nails, etc.) into the seat.
■To prevent battery discharge
Turn the seat heaters/seat ventilators off when the engine is off.