2018 Lexus GS450h warning light

4487-2. Steps to take in an emergency
GS450h_OM_OM30G62U_(U)
Firmly tighten each wheel nut two or
three times in the order shown in the
illustration.
Tightening torque:
76 ft•lbf (103 N•m, 10.5 kgf•m)
Stow the flat tire, tire jack and all tools.
■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. 477)
■When using the compact spare tire
As the compact spare tire is not equipped wi th a tire pressure warning valve and trans-
mitter, 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 warn-
ing light comes on, the light remains on.
■When the compact spare tire is equipped
The vehicle may become lower when driving with 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
Install the compact spare tire on one of the front wheels of the vehicle. Perform the fol-
lowing 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.
4
5
1
2
3
WARNING
■When using the compact spare tire
●Remember that the compact spare tire provid ed is specifically designed for use with
your vehicle. Do not use your comp act spare tire on another vehicle.
●Do not use more than one compact spare tire simultaneously.
●Replace the compact spare tire with a standard tire as soon as possible.
●Avoid sudden acceleration, abrupt steering, sudden braking and shifting operations
that cause sudden engine braking.

4607-2. Steps to take in an emergency
GS450h_OM_OM30G62U_(U)
WARNING
■Avoiding 12-volt battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flammable gas
that may be emitted from the 12-volt battery:
●Make sure each jumper cable is connected to the correct terminal and that it is not
unintentionally in contact with any other than the intended terminal.
●Do not allow the other end of the jumper cab le connected to the “+” terminal to come
into contact with any other parts or metal surfaces in the area, such as brackets or
unpainted metal.
●Do not allow the + and - clamps of the jump er cables to come into contact with each
other.
●Do not smoke, use matches, cigarette light ers or allow open flame near the 12-volt
battery.
■12-volt battery precautions
The 12-volt battery contains poisonous and co rrosive acidic electrolyte, while related
parts contain lead and lead compounds. Ob serve the following precautions when han-
dling the 12-volt battery:
●When working with the 12-volt battery, always wear safety glasses and take care not
to allow any 12-volt battery fluids (acid) to come into contact with skin, clothing or the
vehicle body.
●Do not lean over the 12-volt battery.
●In the event that 12-volt battery fluid comes into contact with the skin or eyes, immedi-
ately wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medical attention can be
received.
●Always wash your hands after handling the 12-volt battery support, terminals, and
other battery-related parts.
●Do not allow children near the 12-volt battery.
■After recharging the 12-volt battery
Have the 12-volt battery inspected at yo ur Lexus dealer as soon as possible.
If the 12-volt battery is deteriorating, continued use may cause the 12-volt battery to
emit a malodorous gas, which may be de trimental to the health of passengers.
■When replacing the 12-volt battery
→P. 364
NOTICE
■When handling jumper cables
When connecting the jumper cables, ensure that they do not become entangled in the
cooling fans or belt.
■To prevent damaging the vehicle
The exclusive jump starting te rminal is to be used when charging the 12-volt battery
from another vehicle in an emergency. It cannot be used to jump start another vehicle.

GS450h_OM_OM30G62U_(U)
4778-1. Specifications
8
Vehicle specifications
*: Minimum pedal clearance when depressed with a force of 112.4 lbf (500 N, 51.0 kgf)
while the hybrid system is operating.
When performing the brake pedal inspection , also be sure to check that the brake
system warning light is not illuminated when the hybrid system is operating (If the
brake system warning light is illuminated, refer to P. 404).
Type A
Brakes
Pedal clearance*4.5 in. (115 mm) Min.
Pedal free play0.04 — 0.24 in. (1.0 — 6.0 mm)
Brake pad wear limit0.04 in. (1.0 mm)
Parking brake lining wear limit0.04 in. (1.0 mm)
Fluid typeSAE J1703 or FMVSS No. 116 DOT 3
Steering
Free playLess than 1.2 in. (30 mm)
Tires and wheels
Tire size225/50R17 94W
Tire inflation
pressure
(Recommended
cold tire inflation
pressure)Vehicle speed
Front tire
psi (kPa, kgf/cm2
or bar)
Rear tire
psi (kPa, kgf/cm2
or bar)
More than 118 mph
(190 km/h)45 (310, 3.1)45 (310, 3.1)
118 mph (190 km/h)
or less35 (240, 2.4)35 (240, 2.4)
Wheel size17 × 7 1/2J
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

526What to do if... (Troubleshooting)
GS450h_OM_OM30G62U_(U)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? (→P. 406)
●The parking brake indicator is on
Is the parking brake released? ( →P. 196)
Depending on the situation, other types of warning buzzer may also sound.
(→ P. 404, 410)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. (→ P. 77)
To stop the alarm, turn the power switch to ON mode or start the hybrid system.
●Is the electronic key left inside the vehicle or the moon roof opened?
Check the message on the multi-information display. (→ P. 410)
●When a warning light turns on or a warning message is displayed, refer to
P. 404, 410.A warning buzzer sounds during driving
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

528Alphabetical index
GS450h_OM_OM30G62U_(U)
Alphabetical index
A/C ............................................................ 287Air conditioning filter....................... 380
Changing the rear seat settings .................................................294
Front automatic air conditioning system ..................................................287
Micro dust and pollen filter ...........293
Rear air conditioning system....... 298
S-FLOW mode ................................. 288
ABS (Anti-lock Brake System)....... 268 Function ................................................. 268
Warning light ...................................... 404
Warning message .............................. 410
Adaptive Front-lighting System (AFS) ....................................................... 201
Adaptive Variable Suspension system (AVS)...................................... 269
AFS (Adaptive Front-lighting System) ................................................... 201
Air conditioning filter ..........................380
Air conditioning system ..................... 287 Air conditioning filter....................... 380
Changing the rear seat settings .................................................294
Front automatic air conditioning system ..................................................287
Micro dust and pollen filter ...........293
Rear air conditioning system....... 298
S-FLOW mode ................................. 288 Airbags ........................................................ 35
Airbag operating conditions ...........42
Airbag precautions for your child ....................................... 38
Airbag warning light ........................ 404
Correct driving posture .................... 28
Curtain shield airbag operating conditions ........................42
Curtain shield airbag precautions .......................................... 40
Front passenger occupant classification system......................... 46
General airbag precautions ........... 38
Locations of airbags............................ 35
Modification and disposal of airbags................................................. 41
Side airbag operating conditions ..............................................42
Side airbag precautions .................... 38
Side and curtain shield airbags operating conditions ........................42
Side and curtain shield airbags precautions .......................................... 38
SRS airbags ............................................. 35
Alarm ............................................................ 77 Alarm ........................................................... 77
Warning buzzer...................... 404, 410
Anchor brackets....................................... 57
Antennas (smart access system with push-button start) ..................... 135
Anti-lock Brake System (ABS) ...... 268 Function .................................................. 268
Warning light ....................................... 404
Warning message...............................410
A

529Alphabetical index
GS450h_OM_OM30G62U_(U)
Approach warning............................... 250
Armrest ...................................................... 317
Assist grips .............................................. 320
Audio input
*
Audio system*
Automatic headlight leveling system .................................................... 202
Automatic light control system.......200
AUX port
*
Auxiliary boxes ......................................... 311
AVS (Adaptive Variable Suspension system).......................... 269
Back-up lights Replacing light bulbs ........................393
Battery (12-volt battery) .................... 362 If the 12-volt battery is discharged .........................................457
Preparing and checking before winter .................................................... 276
Warning light ...................................... 404
Battery (traction battery) ..................... 70
Blind Spot Monitor (BSM)................ 260 Blind Spot Monitor function .........263
Rear Cross Traffic Alert function ................................................265
Bluetooth
®*
Brake Brake Hold ............................................ 198
Fluid ..........................................................360
Parking brake ........................................196
Regenerative braking ..........................67
Warning light .......................... 404, 406
Warning message...............................410
Brake assist ............................................. 268
Brake Hold................................................198
Break-in tips ............................................. 169
Brightness control Instrument panel light control .......... 91
BSM (Blind Spot Monitor) ............... 260 Blind Spot Monitor function......... 263
Rear Cross Traffic Alert function................................................ 265
Care................................................336, 340 Aluminum wheels .............................. 337
Exterior ................................................... 336
Interior .....................................................340
Seat belts.................................................. 341
Cargo capacity ....................................... 179
Cargo hooks ............................................ 312
CD player
*
Chains ........................................................278
B
C
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.

531Alphabetical index
GS450h_OM_OM30G62U_(U)
Daytime running light system ........... 201
DefoggerFront windshield .................................293
Outside rear view mirrors .............293
Rear window ........................................293
Differential ............................................... 476
Dimensions ............................................. 470
Dinghy towing........................................... 181
Display 12.3-inch display................................ 285
Drive information .................................. 97
Dynamic radar cruise control with full-speed range .................... 243
Energy monitor .................................... 109
LKA (Lane-Keeping Assist) ........ 238
Multi-information display ..................95
Trip information .................................... 88
Warning message .............................. 410
Do-it-yourself maintenance ............. 349
Door courtesy lights Location ................................................. 304
Door lock Doors ......................................................... 122
Smart access system with push-button start ............................. 135
Wireless remote control .................. 122 Doors .......................................................... 122
Automatic door locking and unlocking system .................... 125
Door glasses ......................................... 160
Door lock................................................. 124
Open door warning buzzer ..........136
Outside rear view mirrors ..............156
Rear door child-protector .............. 125
Drive info 1/Drive info 2/ Drive info 3........................................... 100 Drive information...................................97
Drive-Start Control..................... 169, 193
Driver’s seat position memory.......... 145 Driving position memory.................146
Memory recall function .................... 147
Power easy access system .............145
Driving ........................................................168 Break-in tips ...........................................169
Correct driving posture .................... 28
Driving mode select switch ..........258
Hybrid vehicle driving tips .............274
Procedures ............................................ 168
Winter drive tips ................................ 276
DRS (Dynamic Rear Steering) ........269 Function .................................................. 269
Warning message...............................410
DVD player
*
Dynamic radar cruise control with full-speed range Function .................................................. 243
Warning message...............................410
Dynamic Rear Steering (DRS) ........269 Function .................................................. 269
Warning message...............................410
D
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.

532Alphabetical index
GS450h_OM_OM30G62U_(U)
Eco drive mode ..................................... 258
EDR (Event data recorder) ...................10
Electric motor (traction motor) ......... 66
Electric Power Steering (EPS) ....... 269Function ..................................................269
Warning light ...................................... 405
Warning message .............................. 410
Electronic key ........................................... 118 Battery-saving function .....................137
If the electronic key does not operate properly.............................454
Replacing the battery ...................... 382
Emergency, in case of If a warning buzzer sounds.......... 404
If a warning light turns on.............. 404
If a warning message is displayed ......................................... 410
If the 12-volt battery is discharged .........................................457
If the electronic key does not operate properly ........454
If the hybrid system will not start....................................... 450
If the parking brake cannot be released ........................452
If you have a flat tire ........................... 441
If you think something is wrong.............................................. 403
If your vehicle becomes stuck .... 466
If your vehicle has to be stopped in an emergency .............................397
If your vehicle needs to be towed ...................................... 398
If your vehicle overheats ................. 461 Emergency flashers ............................ 396
Energy monitor ........................................ 110
Engine
Accessory mode ................................ 183
Compartment ..................................... 353
Engine switch ........................................182
Hood..........................................................351
How to start the hy brid system ....182
Identification number......................... 471
Ignition switch (power switch) ..................................182
Overheating...........................................461
Power switch .........................................182
Engine compartment cover............. 354
Engine coolant ...................................... 358 Capacity................................................. 475
Checking ...............................................358
Preparing and checking before winter .................................... 276
Engine coolant temperature gauge ........................................................ 88
Engine oil ................................................. 355 Capacity................................................. 473
Checking ...............................................355
Oil level warning message .............410
Oil pressure warning message.............................410
Preparing and checking before winter .................................... 276
Engine oil maintenance data ............344
E