warning light LEXUS LS460L 2016 Service Manual

5666-3. Do-it-yourself maintenance
LS460/LS460L_GE (OM50G06E)
CAUTION
■Using tires of a different size
Do not use tires of a different size from those equipped when the vehicle was new,
as the front tire steering angle setting is designed for the original tire size. It is dan-
gerous to use an incorrect wheel and tire combination as this may result in reduced
vehicle stability.
■When initializing the tire pressure warning system (vehicles with the tire pressure
warning system)
Do not operate the tire pressure warning reset switch without first adjusting the tire
inflation pressure to the specified level. Otherwise, the tire pressure warning light
may not come on even if the tire inflation pressure is low, or it may come on when
the tire inflation pressure is actually normal.
■Caution regarding interference with electronic devices (vehicles with the tire
pressure warning system)
●Users of any electrical medical device other than implantable cardiac pacemak-
ers, cardiac resynchronization therapy-pacemakers or implantable cardioverter
defibrillators should consult the manufacturer of the device for information about
its operation under the influence of radio waves.
Radio waves could have unexpected effects on the operation of such medical
devices.
●People with implantable cardiac pacemak-
ers, cardiac resynchronization therapy-
pacemakers or implantable cardioverter
defibrillators should not come within 450
mm (17.7 in.) of the tire pressure warning
system initiators. The radio waves may
affect the operation of such devices.

593
7When trouble arises
LS460/LS460L_GE (OM50G06E)
7-1. Essential information
Emergency flashers .................. 594
If your vehicle has to be
stopped in an
emergency.................................595
7-2. Steps to take in an
emergency
If your vehicle needs to
be towed..................................... 596
If you think something is
wrong...........................................603
Fuel pump shut off system ......604
If a warning light turns on
or a warning
buzzer sounds ..........................605
If a warning message is
displayed ......................................614
If you have a flat tire ................... 618
If the engine will not start ........ 627
If the parking brake
cannot be released................. 629
If the electronic key does
not operate properly .............. 631
If the vehicle battery is
discharged ................................. 636
If your vehicle overheats ...........641
If the vehicle becomes
stuck ............................................. 645

6057-2. Steps to take in an emergency
7
When trouble arises
LS460/LS460L_GE (OM50G06E)
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 vehicl e inspected by your Lexus dealer.
Stop the vehicle immediately. Cont inuing to drive the vehicle may
be dangerous.
Warning lightWarning light/Details
Brake system warning light (warning buzzer) • Low brake fluid
• Malfunction in the electronically controlled brake system

6067-2. Steps to take in an emergency
LS460/LS460L_GE (OM50G06E)
The following warning indicates the possibility of damage to the vehicle
that may lead to an accident. Immediately stop the vehicle in a safe place
and contact your Lexus dealer.
Failure to investigate the cause of the following warnings may lead to the
system operating abnormally and possibly cause an accident. Have the
vehicle inspected by your Lexus dealer immediately.
Stop the vehicle immediately.
Warning lightWarning light/Details
Charging system warning light
Indicates a malfunction in the vehicle’s charging system
Have the vehicle inspected by your Lexus dealer immediately.
Warning lightWarning light/Details
Malfunction indicator lamp
Indicates a malfunction in:
• The emission control system (on some models);
• The electronic engine control system;
• The electronic throttle control system; or
• The electronic automatic transmission control system
SRS warning light
Indicates a malfunction in:
• The SRS airbag system;
• The front passenger occupant classification system (if
equipped);
• The seat belt pretensioner system; or
• The active head restraints system
ABS warning light
Indicates a malfunction in:
•The ABS; or
• The brake assist system
Electric power steering system warning light (warning buzzer)
Indicates a malfunction in the EPS (Electric Power Steering)
system

6077-2. Steps to take in an emergency
7
When trouble arises
LS460/LS460L_GE (OM50G06E)
(Flashes)
(If equipped)
Pre-crash safety system warning light
Indicates a malfunction in the pre-crash safety system
The warning light will operate as follows, even when the system
is not malfunctioning:
• The light will flash quickly when the system is operating.
( P. 368)
• The light will turn on when the pre-crash braking is disabled.
( P. 363, 370)
• The light will turn on when the system cannot temporarily be
used.
Slip indicator
Indicates a malfunction in:
•The VSC system;
•The TRC system;
•The ABS; or
• The hill-start assist control system
The light will flash when the VS C, the TRC, the ABS or the hill-
start assist control system is operating. ( P. 362)
(Flashes)
Brake hold operated indicator
Indicates a malfunction in the brake hold system
(Flashes)
Parking brake indicator
Indicates a malfunction in the electric parking brake
Brake system warning light
Indicates a malfunction in:
• The electronically controlled brake system; or
• The electric parking brake
Warning lightWarning light/Details

6087-2. Steps to take in an emergency
LS460/LS460L_GE (OM50G06E)
After taking the specified steps to correct the suspected problem, check
that the warning light goes off.
Follow the correction procedures.
Warning lightWarning light/DetailsCorrection procedure
Open door warning light
(warning buzzer)*1
Indicates that a door or the
trunk is not fully closed
Check that all the doors and
the trunk are closed.
In the fuel
gauge
Low fuel level warning light
Indicates remaining fuel is
approximately 13 L (3.4 gal.,
2.8 Imp. gal.) or less
Refuel the vehicle.
Seat belt reminder light (warn-
ing buzzer)*2
Warns the driver and/or front
passenger to fasten their seat
belts
Fasten the seat belt.
If the front passenger’s seat is
occupied, the front passen-
ger’s seat belt also needs to
be fastened to make the
warning light (warning
buzzer) turn off.
Master warning light
A buzzer sounds and the
warning light comes on and
flashes to indicate that the
master warning system has
detected a malfunction.
 P. 614

6097-2. Steps to take in an emergency
7
When trouble arises
LS460/LS460L_GE (OM50G06E)
(If equipped)
Tire pressure warning light
When the light comes on:
Low tire inflation pressure
such as
• Natural causes ( P. 612)
• Flat tire ( P. 618)
Adjust the tire inflation pressure
(including the spare tire) to the
specified level.
The light will turn off after a
few minutes. In case the light
does not turn off even if the
tire inflation pressure is
adjusted, have the system
checked by your Lexus
dealer.
When the light comes on
after blinking for 1 minute:
Malfunction in the tire pres-
sure warning system
( P. 612)
Have the system checked by
your Lexus dealer.
Warning lightWarning light/DetailsCorrection procedure

6117-2. Steps to take in an emergency
7
When trouble arises
LS460/LS460L_GE (OM50G06E)
■Speed warning buzzer (if equipped)
The buzzer indicates that your vehicle speed reaches or exceeds 120 km/h (75
mph).
At this time, warning message will appear on the multi-information display.
( P. 614)
■Front passenger detection sensor, seat belt reminder and warning buzzer
●If luggage is placed on the front passenger seat, the front passenger detection sen-
sor may cause the warning light to flash and the warning buzzer to sound even if a
passenger is not sitting in the seat.
●If a cushion is placed on the seat, the sensor may not detect a passenger, and the
warning light may not operate properly.
■Electric power steering system warning light (warning buzzer)
When the battery charge becomes insufficient of the voltage temporarily drops, the
electric power steering system warning light may come on and the warning buzzer
may sound.
■If the malfunction indicator lamp comes on while driving (for Korea)
First check the following:
●Is the fuel tank empty?
If it is, fill the fuel 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 several trips, contact your Lexus dealer as soon
as possible.
■If the malfunction indicator lamp come s on while driving (except for Korea)
For some models, the malfunction indicator lamp will come on if the fuel tank
becomes completely empty. If the fuel tank is empty, refuel the vehicle immediately.
The malfunction indicator lamp will go off after several trips.
If the malfunction indicator lamp does not go off, contact your Lexus dealer as soon
as possible.

6127-2. Steps to take in an emergency
LS460/LS460L_GE (OM50G06E)
■When the tire pressure warning light comes on (vehicles with the tire pressure
warning system)
Carry out the following procedure after the tire temperature has lowered sufficiently.
●Check the tire inflation pressure and adjust it to the appropriate level.
●If the warning light does not go out after several minutes, check that the tire infla-
tion pressure is at the specified level and carry out initialization.
The warning light may come on again if the above operations are conducted without
first allowing the tire temperature to lower sufficiently.
■The tire pressure warning light may come on due to natural causes (vehicles with
the tire pressure warning system)
The tire pressure warning light may come on due to natural causes such as natural
air leaks and tire inflation pressure changes caused 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 (vehicles with the tire pressure warning
system)
The spare tire is also equipped with a tire pressure warning valve and transmitter. The
tire pressure warning light will turn on if the tire inflation pressure of the spare tire is
low. 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 warning system may not function properly (vehi-
cles with the tire pressure warning system)
 P. 561
■If the tire pressure warning light frequently comes on after blinking for 1 minute
(vehicles with the tire pressure warning system)
If the tire pressure warning light frequently comes on after blinking for 1 minute when
the engine switch is turned to IGNITION ON mode, have it checked by your Lexus
dealer.
■Warning buzzer
In some cases, the buzzer may not be heard due to ambient noise or sounds from the
audio system.
■Customization (for GCC countries* and Yemen)
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features P. 678)
*: Saudi Arabia, Sultanate of Oman, Bahrain, United Arab Emirates, Qatar, Kuwait

6137-2. Steps to take in an emergency
7
When trouble arises
LS460/LS460L_GE (OM50G06E)
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 (vehicles with the tire pressure warn-
ing system)
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.
●As the tire inflation pressure may be low when this warning light is illuminated,
stop your vehicle in a safe place as soon as possible 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. 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 (vehicles with the tire pressure
warning system)
The tire pressure warning system may not activate immediately.
NOTICE
■To ensure the tire pressure warning system operates properly (vehicles with the
tire pressure warning system)
Do not install tires with different specifications or makers, as the tire pressure warn-
ing system may not operate properly.