2018 Lexus GS350 ignition

4387-2. Steps to take in an emergency
GS350_300_GS F_OM_OM30G34U_(U)
■SRS warning light
This warning light system monitors the airbag sensor assembly, front impact sensors, side
impact sensors (front door), side impact se nsors (front), side impact sensors (rear),
driver’s seat position sensor, driver’s seat belt buckle switch, front passenger occupant
classification system, “AIR BAG ON” indicat or light, “AIR BAG OFF” indicator light,
front passenger’s seat belt buckle switch, seat belt pretensioner assemblies, airbags,
interconnecting wiring and power sources. (→P. 43)
■Front passenger detection sensor, 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 the malfunction indicator lamp comes on while driving
First check the following:
●Is the fuel tank empty?
If it is, fill the fu el 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 severa l trips, contact your Lexus dealer as soon as
possible.
■Electric power steering system warning light (warning buzzer)
When the battery charge becomes insufficien t or the voltage temporarily drops, the
electric power steering system warning li ght may come on and the warning buzzer may
sound.
■When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level. Initializing the tire
pressure warning system will not turn off the tire pressure warning light.
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such as natural air
leaks and tire inflation pressure changes caus ed by temperature. In this case, adjusting
the tire inflation pressure will turn off the warning light (after a few minutes).
■When a tire is replaced with a spare tire
The compact spare tire is not equipped with a tire pressure warning valve and transmit-
ter. If a tire goes flat, the tire pressure warning light will not turn off even though the flat
tire has been replaced with the spare tire.
■Conditions that the tire pressure wa rning system may not function properly
→ P. 398
■If the tire pressure warning light freque ntly comes on after blinking for 1 minute
If the tire pressure warning light frequently comes on after blinking for 1 minute when the
engine switch is turned to IGNITION ON mo de, have it checked by your Lexus dealer.

5027-2. Steps to take in an emergency
GS350_300_GS F_OM_OM30G34U_(U)
Ensure that the shift lever is in P and depress the brake pedal.
Touch the Lexus emblem side of the electronic key to the engine switch.
When the electronic key is detected, a buzzer sounds and the engine switch will turn
to IGNITION ON mode.
When the smart access system with push-button start is deactivated in customization
setting, the engine switch w ill turn to ACCESSORY mode.
Firmly depress the brake pedal and check that and a message (GS F
only) are shown on the multi-information display.
Press the engine switch.
In the event that the engine still cannot be started, contact your Lexus dealer.
Starting the engine
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GS350/GS300GS F
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5067-2. Steps to take in an emergency
GS350_300_GS F_OM_OM30G34U_(U)
GS F
Connect a positive jumper cable clamp to the positive (+) battery terminal
on your vehicle
Connect the clamp on the other end of the positive cable to the positive (+)
battery terminal on the second vehicle
Connect a negative cable clamp to the negative (-) battery terminal on the
second vehicle
Connect the clamp at the other end of the negative cable to a solid, station-
ary, unpainted metallic po int away from the battery and any moving parts,
as shown in the illustration.
Start the engine of the second vehicle. Increase the engine speed slightly and
maintain at that level for approximatel y 5 minutes to recharge the battery of
your vehicle.
Open and close any of the doors of your vehicle with the engine switch off.
Maintain the engine speed of the second vehicle and start the engine of your
vehicle by turning the engine switch to IGNITION ON mode.
Once the engine has started, remove the jumper cables in the exact reverse
order from which they were connected.
Once the engine starts, have the vehicle inspected at your Lexus dealer as soon
as possible.
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GS350_300_GS F_OM_OM30G34U_(U)
5258-1. Specifications
8
Vehicle specifications
Cooling system
Capacity
GS3509.9 qt.(9.4 L, 8.3 Imp.qt.)
GS300
Engine coolant
9.5 qt.(9.0 L, 7.9 Imp.qt.)
Intercooler
2.7 qt.(2.6 L, 2.3 Imp.qt.)
GS F11.9 qt. (11.3 L, 9.9 Imp.qt.)
Coolant typeUse either of the following: • “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based non- silicate, non-amine, non-nitrite, and non-borate
coolant with long-life hybrid organic acid tech-
nology
Do not use plain water alone.
Ignition system
GS350GS300GS F
Spark plug
Make
GapDENSO
FK20HBR8
0.031 in. (0.8 mm)NGK
DILFR7K9G
0.04 in. (0.9 mm)DENSO
FK20HBR-J8
0.031 in. (0.8 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.

556
GS350_300_GS F_OM_OM30G34U_(U)8-2. Customization
■Automatic air conditioning system (
→P. 308)
■Front seat heaters (wit hout seat ventilators)* (→ P. 324)
*: If equipped
■Front seat heaters and ventilators*1/rear seat heaters*2 (→ P. 323)
*1: If both are equipped
*2: If equipped
FunctionDefault
settingCustomized setting
A/C Auto switch operationOnOffO—O
Exhaust gas sensor informationStandard-3 to 3O—O
123
FunctionDefaultsettingCustomized setting
Automatic operation of front seat heaterOffOn——O
123
FunctionDefault
settingCustomized setting
Adjustment of the front seat heater tem-
perature or the ventilator fan speed
during automatic operation (individual
seat adjustment available) Level 3
(standard)Level 1 (low) to level 5 (high)O—O
Adjustment of the re ar seat heater tem-
perature during automatic operation
(individual seat ad justment available)Level 3
(standard)Level 1
(low) to
level 5 (high)
O—O
Rear seat heater start-up conditions
when the engine switch is in IGNITION
ON mode (individual seat adjustment
available)
OffOn
(AUTO)O—O
123

558
GS350_300_GS F_OM_OM30G34U_(U)8-2. Customization
■Rear sunshade* (
→ P. 341)
*: If equipped
■Seat belt reminder buzzer ( →P. 436)
■Vehicle customization
●When the speed linked door locking function and shift position linked door locking
function are both on, the door lock operates as follows.
• When shifting the shift lever to any position other than P, all the doors will be locked.
• If the vehicle is started with all the doors locked, the speed linked door locking func-
tion would not operate.
• If the vehicle is started with any door un locked, the speed linked door locking func-
tion will operate.
●When the smart access system with push-button start is off, the selecting door to
unlock cannot be customized.
●When the doors remain closed after unloc king the doors and the automatic door lock
function (time elapsed before the automatic d oor lock function is activated if a door is
not opened after being unlock ed) activates, the signals will be generated in accordance
with the operation signal (buzzers) and the operation signal (emergency flashers) set-
tings.
●Some settings can be changed using a switch or the Remote Touch screen. If a setting is
changed using a switch, the changed setting will not be reflected on the Remote Touch
screen until the engine switch is turn ed off and then to IGNITION ON mode.
■When customizing using the Remote Touch
Stop the vehicle in a safe place, apply the parking brake, and shift the shift lever to P. Also,
to prevent battery discharge, leave the engine running while customizing the features.
FunctionDefault settingCustomized setting
Reverse operationOnOff——O
Time elapsed before the reverse opera-
tion feature activates0.7
seconds
0 second
——O
0.9
seconds
1.2
seconds
123
FunctionDefault
settingCustomized setting
Speed-linked seat belt reminder func-
tionOnOff——O
123

576What to do if... (Troubleshooting)
GS350_300_GS F_OM_OM30G34U_(U)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, ne w genuine mechanical keys can be made
by your Lexus dealer. ( →P. 134)
●If you lose your electronic keys, the risk of vehicle theft increases significantly.
Contact your Lexus dealer immediately. (→ P. 135)
●Is the electronic key battery weak or depleted? ( →P. 410)
●Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. (→P. 198)
●Is the electronic key left inside the vehicle?
When locking the doors, make sure that you have the electronic key on your
person.
●The function may not operate properly du e to the condition of the radio wave.
(→ P. 152)
●Is the child-protector lock set?
The rear door cannot be opened from in side the vehicle when the lock is set.
Open the rear door from outside and then unlock the child-protector lock.
(→ P. 140)
●The function to prevent the electronic key from being left inside the trunk will
operate and you can open th e trunk as usual. Take the key out from the trunk.
(→ P. 145)
If you have a problem, check the foll owing before contacting your Lexus
dealer.
The doors cannot be locked, unlocked, opened or closed
You lose your keys
The doors cannot be locked or unlocked
The rear door cannot be opened
The trunk lid is closed with the electronic key left inside

577What to do if... (Troubleshooting)
GS350_300_GS F_OM_OM30G34U_(U)
●Did you press the engine switch while firmly depressing the brake pedal?
(→ P. 197)
●Is the shift lever in P? ( →P. 199)
●Is the electronic key anywhere detectable inside the vehicle? ( →P. 150)
●Is the steering wheel unlocked? (→ P. 199)
●Is the electronic key battery weak or depleted?
In this case, the engine can be started in a temporary way. (→P. 502)
●Is the battery discharged? ( →P. 504)
●Is the engine switch in IGNITION ON mode?
If you cannot release the shift lever by depressing the brake pedal with the
engine switch in IGNITION ON mode (→ P. 208)
●It is locked automatically to prevent theft of the vehicle. ( →P. 199)
●Is the window lock switch pressed?
The power window except for the one at the driver’s seat cannot be operated
if the window lock switch is pressed. ( →P. 175)
●The auto power off function will be operated if the vehicle is left in ACCES-
SORY or IGNITION ON mode (the engine is not running) for a period of
time. ( →P. 199)
If you think something is wrong
The engine does not start
The shift lever cannot be shifted from P even if you depress the brake
pedal
The steering wheel cannot be turned after the engine is stopped
The windows do not open or close by operating the power window
switches
The engine switch is turned off automatically