2018 Lexus GS450h warning lights

388
GS450h_OM_OM30G62U_(U)
6-3. Do-it-yourself maintenance
■After a fuse is replaced
●If the lights do not turn on even after the fuse has been replaced, a bulb may need
replacement. (→P. 391)
●If the replaced fuse blows again, have th e vehicle inspected by your Lexus dealer.
■If there is an overload in a circuit
The fuses are designed to blow, protecting the wiring harness from damage.
■When replacing light bulbs
Lexus recommends that you use genuine Lexus products designed for this vehicle.
Because certain bulbs are connected to circui ts designed to prevent overload, non-gen-
uine parts or parts not designed for this vehicle may be unusable.
WARNING
■To prevent system breakdowns and vehicle fire
Observe the following precautions.
Failure to do so may cause damage to th e vehicle, and possibly a fire or injury.
●Never use a fuse of a higher amperage rating than that indicated, or use any other
object in place of a fuse.
●Always use a genuine Lexus fuse or equivalent.
Never replace a fuse with a wire, even as a temporary fix.
●Do not modify the fuses or fuse boxes.
NOTICE
■Before replacing fuses
Have the cause of electrical overload determined and repaired by your Lexus dealer as
soon as possible.

394
GS450h_OM_OM30G62U_(U)
6-3. Do-it-yourself maintenance
■LED Lights
The lights other than the front turn signal light (vehicles with single-beam headlights) and
outer foot lights each consist of a number of LEDs. If any of the LEDs burn out, take your
vehicle to your Lexus dealer to have the light replaced.
■Condensation build-up on the inside of the lens
Temporary condensation build-up on the inside of the headlight lens does not indicate a
malfunction. Contact your Lexus dealer for mo re information in the following situations:
●Large drops of water have built up on the inside of the lens.
●Water has built up inside the headlight.
■When replacing light bulbs
→P. 388
WARNING
■Replacing light bulbs
●Turn off the lights. Do not attempt to replac e the bulb immediately after turning off the
lights.
The bulbs become very hot and may cause burns.
●Do not touch the glass portion of the light bu lb with bare hands. When it is unavoid-
able to hold the glass portion, use and hold with a clean dry cloth to avoid getting
moisture and oils on the bulb.
Also, if the bulb is sc ratched or dropped, it may blow out or crack.
●Fully install light bulbs and any parts used to secure them. Failure to do so may result
in heat damage, fire, or water entering th e headlight unit. This may damage the head-
lights or cause condensation to build up on the lens.
■To prevent damage or fire
●Make sure bulbs are fully seated and locked.
●Check the wattage of the bulb before installing to prevent heat damage.

404
GS450h_OM_OM30G62U_(U)
7-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer
sounds
Calmly perform the following actions if any of the warning lights comes on or
flashes. If a light comes on or flashes, but then goes off, this does not necessar-
ily indicate a malfunction in the system. However, if this continues to occur,
have the vehicle inspecte d by your Lexus dealer.
Warning light and warning buzzer list
Warning lightWarning light/Details/Actions
(U.S.A.)
(Canada)
Brake system warning light (warning buzzer) •Low brake fluid
• Malfunction in the electronically controlled brake system
→ Immediately stop the vehicle in a safe place and contact your
Lexus dealer. Continuing to drive the vehicle may be dangerous.
(If equipped)
Charging system warning light
Indicates a malfunction in the vehicle’s charging system
→ Immediately stop the vehicle in a safe place and contact your
Lexus dealer.
(U.S.A.)
(Canada)
Malfunction indicator lamp Indicates a malfunction in:
• The hybrid system;
• The electronic engine control system;
• The electronic throttle control system; or
• The electronic hybrid transmission control system
→ Have the vehicle inspected by your Lexus dealer immediately.
SRS warning light
Indicates a malfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system
→ Have the vehicle inspected by your Lexus dealer immediately.
(U.S.A.)
(Canada)
ABS warning light Indicates a malfunction in:
• The ABS; or
• The brake assist system
→ Have the vehicle inspected by your Lexus dealer immediately.

4087-2. Steps to take in an emergency
GS450h_OM_OM30G62U_(U)
■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. 370
■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
power switch is turned to ON mode, ha ve it checked by your Lexus dealer.
■Warning buzzer
In some cases, the buzzer may not be heard because of noisy place or an audio sound.
■Customization
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features: →P. 494)
WARNING
■If both the ABS and the brake sy stem warning lights remain on
Stop your vehicle in a safe place immediat ely and contact your Lexus dealer. The vehi-
cle will become extremely unstable during br aking, and the ABS system may fail, which
could cause an accident resultin g in death or serious injury.
■When the electric power steering system warning light comes on
The steering wheel may become extremely heavy.
If the steering wheel becomes heavier than usual when operating, hold firmly and oper-
ate using more force than usual.
■If the tire pressure warning light comes on
Be sure to observe the following precaution s. Failure to do so could cause a loss of
vehicle control and result in death or serious injury.
●Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pressure
immediately.
●If the tire pressure warning light comes on even after tire inflation pressure adjust-
ment, it is probable that you have a flat tire . Check the tires. If a tire is flat, change it
with the spare tire and have the flat tire repaired by the nearest Lexus dealer.
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose
control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.

4257-2. Steps to take in an emergency
GS450h_OM_OM30G62U_(U)
7
When trouble arises
Indicates that the power switch is turned off or turned to
ACCESSORY mode and the driver’s door is opened
while the lights are turned onA buzzer also sounds.
→ Turn the lights off.
Indicates that the moon roof is not fully closed (with the
power switch off, and the driver’s door open)
A buzzer also sounds.
→ Close the moon roof.
Indicates that the windows are not fully closed (with the
power switch off, and the driver’s door open)
A buzzer also sounds.
→ Close all the windows.
Indicates that the windows and the moon roof are not
fully closed (with the power switch off, and the driver’s
door open)
A buzzer also sounds.
→ Close all the windows and the moon roof.
Indicates a malfunction in the brake hold system
A buzzer also sounds.
→ Have the vehicle inspecte d by your Lexus dealer
immediately.
Warning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)
(Flashes)
(Flashes)

4317-2. Steps to take in an emergency
GS450h_OM_OM30G62U_(U)
7
When trouble arises
*: Refer to the separate “Scheduled Maintenance” or “Owner’s Manual Supplement”
for the maintenance interval applicable to your vehicle.
(U.S.A. only)
Indicates that all maintenance according to the driven
distance on the maintenance schedule
* should be per-
formed soon.
Comes on approximately 4500 miles (7200 km)
after the message has been reset.
→ If necessary, perform maintenance.
Indicates that the engine o il and oil filter should be
changed
→ Have the engine oil and oil filter checked and/or
changed by your Lexus dealer. After changing the
engine oil, the oil change system should be reset.
( → P. 355)
(U.S.A. only)
Indicates that all maintenanc e is required to correspond
to the driven distance on the maintenance schedule
*.
Comes on approximately 5000 miles (8000 km)
after the message has been reset. (The message will
not display properly unless the message has been
reset.)
→ Perform the necessary maintenance. Please reset
the message after the maintenance is performed.
(→ P. 344)
(If equipped)
Indicates that the Automati c High Beam switch was
pressed while the low beams were on
→ Turn the high beam headlights on before pressing
the Automatic High Beam switch.
(If equipped)
Indicates that, since the VSC (Vehicle Stability Control)
system was turned off, the pre-collision braking and pre-
collision brake assist are stopped (The pre-collision
warning function will be operational)
→ Turn the VSC on. ( →P. 271)
Warning messageDetails/Actions

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”.