warning Lexus GS350 2015 TIPS FOR THE NAVIGATION SYSTEM / LEXUS 2015 GS350 OWNERS MANUAL (OM30E15U)

5037-2. Steps to take in an emergency
GS350_OM_OM30E15U_(U)
7
When trouble arises
■Warning buzzer
In some cases, the buzzer may not be heard because of noisy place or an audio
sound.
Once
After the engine
switch has been
turned off with the
shift lever in a posi-
tion other than P,
the shift lever has
been shifted to P.
Tu r n t h e
engine
switch off.
Interior buzzerExterior
buzzerWa r n i n g m e s s a g eDetailsCorrection procedure
(Flashes)

5147-2. Steps to take in an emergency
GS350_OM_OM30E15U_(U)
■The compact spare tire
●The compact spare tire is identified by the label “TEMPORARY USE ONLY” on
the tire sidewall.
Use the compact spare tire temporarily, and only in an emergency.
●Make sure to check the tire inflation pressure of the compact spare tire.
( P. 5 4 3 )
■When using the compact spare tire
As the compact spare tire is not equipped with a tire pressure warning valve and
transmitter, low inflation pressure of the spare tire will not be indicated by the tire
pressure warning system. Also, if you replace the compact spare tire after the tire
pressure warning light comes on, the light remains on.
■When the compact spare tire is equipped
The vehicle becomes lower when driving wi th the compact spare tire compared to
when driving with standard tires.
■If you have a flat rear tire on a road covered with snow or ice (vehicles with front
and rear tires of the same size)
Install the compact spare tire on one of th e front wheels of the vehicle. Perform the
following steps and fit tire chains to the rear tires:
Replace a front tire with the compact spare tire.
Replace the flat rear tire with the tire removed from the front of the vehicle.
Fit tire chains to the rear tires.
1
2
3

5167-2. Steps to take in an emergency
GS350_OM_OM30E15U_(U)
CAUTION
■Speed limit when using the compact spare tire
Do not drive at speeds in excess of 50 mph (80 km/h) when a compact spare tire
is installed on the vehicle.
The compact spare tire is not designed for driving at high speeds. Failure to
observe this precaution may lead to an accident causing death or serious injury.
■After using the tools and jack
Before driving, make sure all the tools and jack are securely in place in their stor-
age location to reduce the possibility of pe rsonal injury during a collision or sudden
braking.
NOTICE
■Driving with tire chains and the compact spare tire
Do not fit tire chains to the compact spare tire.
Tire chains may damage the vehicle body and adversely affect driving perfor-
mance.
■When replacing the tires
When removing or fitting the wheels, tire s or the tire pressure warning valve and
transmitter, contact your Lexus dealer as the tire pressure warning valve and trans-
mitter may be damaged if not handled correctly.

554
GS350_OM_OM30E15U_(U)
8-1. Specifications
This information has been prepared in accordance with regulations issued
by the National Highway Traffic Safety Administration of the U.S. Depart-
ment of Transportation.
It provides the purchasers and/or prospective purchasers of Lexus vehi-
cles with information on uniform tire quality grading.
Your Lexus dealer will help answer any questions you may have as you read this
information.
■DOT quality grades
All passenger vehicle tires must conform to Federal Safety Require-
ments in addition to these grades. Quality grades can be found where
applicable on the tire sidewall between tread shoulder and maximum
section width.
For example: Treadwear 200 Traction AA Temperature A
■Treadwear
The treadwear grade is a comparative rating based on the wear rate of
the tire when tested under controlle d conditions on a specified govern-
ment test course.
For example, a tire graded 150 would wear one and a half (1 - 1 /2) times as well
on the government course as a tire graded 100.
The relative performance of tires depends upon the actual conditions of their
use. Performance may differ significantly from the norm due to variations in
driving habits, service practices and differences in road characteristics and cli-
mate.
■Traction AA, A, B, C
The traction grades, from highest to lowest, are AA, A, B and C, and
they represent the tire’s ability to stop on wet pavement as measured
under controlled conditions on sp ecified government test surfaces of
asphalt and concrete.
A tire marked C may have poor traction performance.
Warning: The traction grade assigned to this tire is based on braking (straight
ahead) traction tests and does not include cornering (turning) traction.
Uniform Tire Quality Grading

GS350_OM_OM30E15U_(U)
5558-1. Specifications
8
Vehicle specifications
■Temperature A, B, C
The temperature grades are A (the highest), B, and C, representing the
tire’s resistance to the generation of heat and its ability to dissipate heat
when tested under controlled conditio ns on a specified indoor labora-
tory test wheel.
Sustained high temperature can cause th e material of the tire to degenerate
and reduce tire life, and excessive temperature can lead to sudden tire failure.
Grade C corresponds to a level of performance which all passenger car tires
must meet under the Federal Motor Vehicle Safety Standard No. 109.
Grades B and A represent higher levels of performance on the laboratory test
wheel than the minimum required by law.
Warning: The temperature grades of a tire assume that it is properly inflated
and not overloaded.
Excessive speed, underinflation, or excessive loading, either separately or in
combination, can cause heat buildup and possible tire failure.

572
GS350_OM_OM30E15U_(U)
8-3. Initialization
Items to initialize
The following items must be initialized for normal system operation
after such cases as the batter y being reconnected, or maintenance
being performed on the vehicle:
ItemWhen to initializeReference
Message indicating mainte-
nance is required• After the maintenance is per- formedP. 3 8 4
Tire pressure warning system
• When rotating the tires
• When changing the tire infla-tion pressure by changing trav-
eling speed or load weight, etc.
P. 4 1 3

593What to do if... (Troubleshooting)
GS350_OM_OM30E15U_(U)
●Is the window lock switch pressed?
The power window except for the one at the driver’s seat can-
not be operated if the window lock switch is pressed. (P. 151)
●The auto power off function will be operated if the vehicle is left
in ACCESSORY or IGNITION ON mode (the engine is not
running) for a period of time. ( P. 180)
●The seat belt remind er light is flashing
Are the driver and the front passenger wearing the seat belts?
( P. 473)
●The parking brake indicator is on
Is the parking brake released? ( P. 1 9 2 )
Depending on the situation, ot her types of warning buzzer may
also sound. ( P. 470, 480)
The windows do not open or close by operating the power win-
dow switches
The engine switch is turned off automatically
A warning buzzer sounds during driving

594What to do if... (Troubleshooting)
GS350_OM_OM30E15U_(U)
●Did anyone inside the vehicle open a door during setting the
alarm?
The sensor detects it and the alarm sounds. ( P. 7 2 )
To stop the alarm, turn the engi ne switch to IGNITION ON mode
or start the engine.
●Is the electronic key left insid e the vehicle or the moon roof
opened?
Check the message on the multi-information display.
( P. 480)
●When a warning light turns on or a warning message is dis-
played, refer to P. 470, 480.
An alarm is activated and the horn sounds
A warning buzzer sounds when leaving the vehicle
A warning light turns on or a warning message is displayed

596Alphabetical index
GS350_OM_OM30E15U_(U)
Alphabetical index
A/C ............................................................. 301Air conditioning filter........................425
Changing the rear seat settings .................................................. 313
Front automatic air conditioning system ................................................... 301
Humidity sensor ...................................317
Micro dust and pollen filter ............ 315
Rear air conditioning system..........321
S-FLOW mode ................................... 315
ABS (Anti-lock Brake System)....... 249 Function ..................................................249
Warning light .........................................471
Warning message ............................ 484
Adaptive Front-lighting system (AFS) ....................................................... 198
Adaptive Variable Suspension system (AVS) ............. 250
AFS (Adaptive Front-lighting System) ................................................... 198
Air conditioning filter .......................... 425
Air conditioning system ...................... 301 Air conditioning filter........................425
Changing the rear seat settings .................................................. 313
Front automatic air conditioning system ................................................... 301
Humidity sensor ...................................317
Micro dust and pollen filter ............ 315
Rear air conditioning system..........321
S-FLOW mode ................................... 315 Airbags .........................................................36
Airbag operating conditions .......... 44
Airbag precautions for your child ....................................... 39
Airbag warning light .......................... 471
Correct driving posture .................... 28
Curtain shield airbag operating conditions ....................... 44
Curtain shield airbag precautions ............................................ 41
Front passenger occupant classification system..........................47
General airbag precautions ........... 39
Locations of airbags............................ 36
Modification and disposal of airbags............................................... 43
Side airbag operating conditions ............................................. 44
Side airbag precautions .................... 39
Side and curtain shield airbags operating conditions ....................... 44
Side and curtain shield airbags precautions ......................... 39
SRS airbags ............................................. 36
Alarm ............................................................ 72 Alarm ........................................................... 72
Warning buzzer.................... 470, 480
Anchor brackets...................................... 59
Antennas (smart access system with push-button start) .....................109
Anti-lock Brake System (ABS) .......249 Function .................................................. 249
Warning light ......................................... 471
Warning message............................. 484
Approach warning (dynamic radar cruise control).........................225
Armrest .................................................... 353
A

597Alphabetical index
GS350_OM_OM30E15U_(U)
Armrest door ......................................... 357
Ashtrays.................................................... 344
Assist grip ................................................ 359
Audio input
*
Audio system*
Automatic headlight leveling system ......................................................199
Automatic light control system ......................................................196
Automatic transmission ...................... 184 If the shift lever cannot be shifted from P ............. 519
M mode ................................................... 187
Paddle shift switches ......................... 186
AUX port
*
Auxiliary boxes ...................................... 338
AVS (Adaptive Variable Suspension system).......................... 250 Back-up lights
Replacing light bulbs ....................... 454
Wattage .................................................545
Battery ...................................................... 406 Battery checking ................................406
If the vehicle battery is discharged .................................... 525
Preparing and checking before winter.................................................... 284
Warning light ......................................... 471
Blind Spot Monitor (BSM) ............... 268
Bluetooth
®*
Brake Fluid .......................................................... 542
Parking brake ........................................ 192
Warning light ........................... 470, 472
Warning message............................ 480
Brake assist ..............................................249
Break-in tips ............................................. 162
Brightness control Instrument panel light control ........ 82
BSM (Blind Spot Monitor) ............... 268 Blind Spot Monitor function..........272
Rear Cross Traffic Alert function................................................ 275
B
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.