2015 LEXUS LS600H warning lights

2794-5. Using the driving support systems
4
Driving
LS600hL_U(OM50E41U)
■After the vehicle has been parked in the sun
The LKA system functions may not be available and a warning message (P. 5 0 3 )
will be displayed for a while after driving ha s started. In such cases, turn the LKA sys-
tem off and turn it on again after normal temperature returns. When the temperature
in the cabin decreases and the temperature around the camera sensor ( P. 2 7 3 )
becomes suitable for its operation, the functions will begin to operate.
■If there are lane markers on only one side of the vehicle
The lane keeping assist function will not operate. Also, the lane departure warning
will not operate for the side on which lane markers could not be recognized.
■Conditions in which the function may not operate correctly
In the following conditions, the LKA system functions may not operate, or it may not
be possible to ensure adequate performance. Also, the camera sensor may be
unable to recognize lane lines causing the lane departure warning function to oper-
ate incorrectly, or the lane keeping assist function may not operate properly. How-
ever, this does not indicate a malfunction.
●When driving through an area with no lane markers, such as a tollbooth, a crossing
or before a ticket checkpoint
●When driving on a sharp curve
●When lanes are extremely narrow or extremely wide
●When the vehicle leans to one side an unusual amount due to a heavy load or
improper tire inflation pressure
●When the following distance between your vehicle and the vehicle ahead is
extremely short
●When the lane markers are yellow (These may be more difficult for the system to
recognize compared to white markers.)
●When the lane markers are broken, “Botts’ dots”, “Raised pavement marker” or
stones
●When lane markers are obscured or pa rtially obscured by sand, dirt, etc.
●When there are shadows on the road running parallel with lane markers, or if a
shadow covers the lane markers
●When driving on a particularly bright road surface, such as concrete
●When driving on a road surface that is bright due to reflected light
●When driving in a location where the light level changes rapidly, such as the
entrance to or exit from a tunnel
●When sunlight or the headlights of oncoming vehicles are shining directly into the
camera lens
●When driving on roads that are branching or merging

2804-5. Using the driving support systems
LS600hL_U(OM50E41U)
●When driving on a road surface that is wet due to rain, previous rainfall, standing
water, etc.
●When the vehicle experiences strong up-and-down motion such as when driving
on an extremely rough road or on a seam in the pavement
●When headlight brightness at nighttime is reduced due to dirt on the lenses, or
when the headlights are misaligned
●When driving with a strong crosswind
●When driving on winding roads or roads that are uneven
●When driving on rough or unpaved roads
■When changing the tires
Depending on the tires used, sufficient performance may not be maintainable.
■Warning messages for LKA
Warning messages are used to indicate a system malfunction or to inform the driver
of the need for caution while driving. ( P. 5 0 3 )
CAUTION
■Before using the LKA system
Do not rely solely on the LKA system. The LKA system does not drive the vehicle
automatically, nor does it reduce the amount of care you need to take. As such, the
driver must always assume full responsi bility for understanding his/her surround-
ings, for operating the steering wheel to correct the driving line, and for driving
safely.
Inappropriate or negligent driving could lead to an accident.
■To avoid operating the LKA by mistake
Switch the LKA off using the LKA switch when not in use.

4937-2. Steps to take in an emergency
7
When trouble arises
LS600hL_U(OM50E41U)
The following warning indicates a possible problem in the brake system.
Immediately stop the vehicle in a safe place and contact your Lexus
dealer.
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 necessarily indicate a malfunction in the system. However, if this
continues to occur, have the vehicle inspected by your Lexus dealer.
Stop the vehicle immediately. Cont inuing to drive the vehicle may
be dangerous.
Warning lightWarning light/Details
(U.S.A.)
(Canada)Brake system warning light (warning buzzer) •Low brake fluid
• Malfunction in the electronically controlled brake system

5007-2. Steps to take in an emergency
LS600hL_U(OM50E41U)
CAUTION
■If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact your Lexus dealer. The
vehicle will become extremely unstable during braking, and the ABS system may
fail, which could cause an accident resulting 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
operate using more force than usual.
■If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause a loss of
vehicle control and result in death or serious injury.
Vehicles with a spare tire
●Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pres-
sure 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.
Vehicles with run-flat tires
●Decelerate to the lowest appropriate speed as soon as possible. Do not drive
over 50 mph (80 km/h).
●Check and 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. Have the tire replaced 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.

5047-2. Steps to take in an emergency
LS600hL_U(OM50E41U)
The warning lights and warning buzzers operate as follows depending on
the content of the message. If a message indicates the need for inspection
by a dealer, have the vehicle inspected by your Lexus dealer immediately.
*: A buzzer sounds the first time a message is shown on the multi-information display.
■Warning message in radar cruise mode (if equipped)
In the following cases, the warning message may not be displayed even if vehicle-to-
vehicle distance decreases:
●When your vehicle and the vehicle ahead are traveling at the same speed or the
vehicle ahead is traveling more quickly than your vehicle
●When the vehicle ahead is traveling at a very low speed
●Immediately after cruise control speed is set
●At the instant the accelerator pedal is depressed
Messages and warnings
System warn- ing lightWa r n i n g buzzer
*Wa r n i n g
Remains onSounds
Indicates an important situation
such as the malfunction of the
system related to driving that
may result in danger
Remains on or flashesSounds
Indicates an important situation
such as the malfunction of the
system shown on the multi-infor-
mation display
FlashesSounds
Indicates a situation such as
damage to the vehicle that may
result in danger
Remains onDoes not sound
Indicates a condition such as a
malfunction of electrical compo-
nents and the need for mainte-
nance
FlashesDoes not sound
Indicates a situation such as the
incorrect performance of an
operation and how to perform
the operation correctly

5057-2. Steps to take in an emergency
7
When trouble arises
LS600hL_U(OM50E41U)
■The LKA (Lane-Keeping Assist) lane departure warning function (if equipped)
In the following cases, the warning message will not be displayed even if a lane line is
crossed.
●When the vehicle speed deviates from the operating range of the LKA system
functions
●When the lane lines cannot be recognized
●When the steering wheel is turned as far as necessary to cause the vehicle to
change lanes
■System warning lights
The master warning light does not come on or flash in the following cases. Instead, a
separate system warning light will come on or flash along with the message shown
on the multi-information display.
●Malfunction of the brake system
The brake system warning light (red indicator) comes on. ( P. 4 9 3 )
●Malfunction of the regenerative brake syst em, electronically controlled brake sys-
tem or electric parking brake
The brake system warning light (yellow indicator) comes on. ( P. 495)
●Malfunction of the ABS
The ABS warning light comes on. ( P. 4 9 4 )
●Malfunction of the charging system
The charging system warning light comes on. ( P. 4 9 4 )
●Indicates that a door or the trunk is not fully closed
The open door warnin g light comes on. (P. 4 9 6 )
●High engine coolant temperature
The needle of the engine coolant temperature gauge enters the red zone.
( P. 5 3 0 )
■If “Maintenance required ” is shown (U.S.A. only)
Perform the necessary maintenance.
Please reset the message after the maintenance is performed. ( P. 4 2 6 )
■If “Hybrid System Overheat” is shown
Coping method: P. 5 3 0
This message may be displayed when driv ing under severe operating conditions.
(For example, when driving up a long steep hill.)
■Warning buzzer
In some cases, the buzzer may not be hear d due to ambient noise or sounds from the
audio system.

599Alphabetical index
LS600hL_U(OM50E41U)
Approach warning............................... 264
Armrest .................................................... 392
Ashtrays.................................................... 379
Assist grips .............................................. 402
Audio/visual system
*
Automatic headlight leveling system .................................................... 236
Automatic High Beam ....................... 238
Automatic light control system....... 234
Auxiliary boxes ........................................ 371 Back-up lights
Replacing light bulbs .........................481
Battery (12-volt battery) .................... 450 If the 12-volt battery is discharged......................................... 527
Preparing and checking before winter.................................................... 325
Warning light ....................................... 494
Battery (traction battery) ....................... 81
Blind Spot Monitor (BSM) ............... 308
Brake Brake Hold ............................................. 231
Fluid .......................................................... 448
Parking brake ...................................... 228
Regenerative braking ......................... 78
Warning light ...........................493, 495
Brake assist ............................................. 289
Brake Hold................................................ 231
Break-in tips ............................................. 199
Brightness control Instrument panel light control ........ 101
BSM (Blind Spot Monitor) ............... 308
B
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.

601Alphabetical index
LS600hL_U(OM50E41U)
Console box ........................................... 369
Consumption screen ............................. 115
Coolant..................................................... 445Capacity .................................................543
Checking................................................445
Preparing and checking before winter ....................................................325
Cooling system ..................................... 445 Engine overheating.......................... 530
Hybrid system overheating ......... 530
Cruise control Cruise control......................................253
Dynamic radar cruise control with full-speed range .................... 257
Cup holders ............................................ 368
Curtain shield airbags ........................... 43
Customizable features ....................... 564
Daytime running light system .......... 236
Defogger Front windshield .................................. 341
Outside rear view mirrors ............ 358
Rear window ....................................... 358
Differential Front differential ..................................544
Rear differential .................................. 545
Dimensions .............................................538
Dinghy towing..........................................215 Display
Dynamic radar cruise control with full-speed range ................... 257
LKA (Lane-Keeping Assist)..........277
Multi-information display................ 105
Remote Touch screen ....................330
Trip information ................................... 106
Warning message.............................503
Do-it-yourself maintenance............. 433
Door courtesy lights ........................... 360
Door lock Doors.........................................................145
Smart access system with push-button start .............................. 125
Wireless remote control....................141
Door pockets ..........................................367
Doors .......................................................... 145 Automatic door locking and unlocking system .................... 147
Door glasses ......................................... 189
Door lock.................................................145
Open door warning buzzer ......... 130
Open door warning light .............. 496
Outside rear view mirrors ............. 185
Rear door child-protector ..............146
D