2015 Lexus IS250 lights

4537-3. Do-it-yourself maintenance
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Maintenance and care
IS350/250_U (OM53C50U)
CAUTION
■Replacing light bulbs
●Turn off the lights. Do not attempt to replace 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 bulb 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 scratched 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 the headlight unit. This may damage the head-
lights or cause condensation to build up on the lens.
■Discharge headlights (if equipped)
●Contact your Lexus dealer before replacing the discharge headlights (including light
bulbs).
●Do not touch the discharge headlight’s high voltage socket when the headlights are
turned on.
An extremely high voltage of 30000 V will be discharged and could result in death
or serious injury by electric shock.
●Do not attempt to take apart or repair the headlight bulbs, connectors, power supply
circuits, or related components.
Doing so could result in electric shock and death or serious injury.
■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.
●Vehicles with discharge headlights:
While the headlights are turned on, and for a
short time after they have been turned off,
metal components at the rear of the headlight
assembly will be extremely hot. To prevent
burns, do not touch these metal components
until you are certain they have cooled down.
Metal components

4668-2. Steps to take in an emergency
IS350/250_U (OM53C50U)
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 inspected 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)*1
Indicates that:
• The brake fluid level is low; or
• The brake system is malfunctioning This light also comes on when th e parking brake is not released.
If the light turns off after the parking brake is fully released the
system is operating normally.
→ Immediately stop the vehicle in a safe place and contact your
Lexus dealer. Continuing to drive the vehicle may be dangerous.
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 electronic engine control system;
• The electronic throttle control system; or
• The electronic automatic 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 pr etensioner 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.

4708-2. Steps to take in an emergency
IS350/250_U (OM53C50U)
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 vehi-
cle 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 oper-
ate 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.
●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.

4728-2. Steps to take in an emergency
IS350/250_U (OM53C50U)
Master warning light
The master warning light also comes on or flashes in order to indicate that a
message is currently being displayed on the multi-information display.
Multi-information display
If any of the warning lights come on ag ain after the following actions have been
performed, contact your Lexus dealer.
If a warning message is displayed
If a warning is shown on the multi-information display, stay calm and perform
the following actions:
XExcept F SPORT modelsXF SPORT models (when the main
meter is in the center position)
XF SPORT models (when the main
meter is in the right-side position)
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4778-2. Steps to take in an emergency
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When trouble arises
IS350/250_U (OM53C50U)
Indicates that the automatic transmission fluid tempera-
ture is too highA buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
(AWD models)
Indicates a malfunction in the AWD system
A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
(If equipped)
Indicates a malfunction in the VGRS (Variable Gear
Ratio Steering) system
A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
Indicates that the engine was stopped while driving
A buzzer also sounds.
→ Operate the steering wheel with more force than
usual.
Indicates that the engine switch is turned off or turned to
ACCESSORY mode and the driver’s door is opened
while the lights are turned on
A buzzer also sounds.
→ Turn the lights off.
(If equipped)
Indicates that the moon roof is not fully closed (with the
engine 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
engine switch off, and the driver’s door open)
A buzzer also sounds.
→ Close all the windows.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)
(Flashes)
(Flashes)

4808-2. Steps to take in an emergency
IS350/250_U (OM53C50U)
*: 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 is required to correspond
to the driven distance on the maintenance schedule*.
Comes on approximately 5000 miles (8000 km) after
the maintenance data has been reset.
(The indicator will not work properly unless the mainte-
nance data has been reset.)
→ Perform the necessary maintenance. Please reset
the maintenance data after the maintenance is per-
formed ( →P. 4 0 3 )
(If equipped)
Indicates that the Automatic High Beam switch is
pressed while the headlights are in low beam.
→ Turn the high beam on and press the Automatic
High Beam switch again.
(If equipped)
Indicates that, since the VSC (Vehicle Stability Control)
system was turned off, the pre-collision brake system
operation is stopped
→Tu r n t h e V S C o n . ( →P. 2 4 2 )
(If equipped)
Indicates that the PCS (Pre-Collision System) is not cur-
rently functional because the grille cover or the sensor is
dirty
→ Check the grille cover and the sensor and clean
them if they are dirty.
Indicates that operation of large electricity consuming
systems such as the air conditioning system are sus-
pended
→Stop using unnecessary electric components to
reduce electricity consumption. Wait a while until
the electric power supply is restored.
(If equipped)
Indicates that the LDA (Lane Departure Alert) system
cannot be used because the vehicle speed is lower than
approximately 32 mph (50 km/h)
→Drive the vehicle at 32 mph (50 km/h) or higher.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)

4968-2. Steps to take in an emergency
IS350/250_U (OM53C50U)
One of the following may be the cause of the problem:
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●The engine may be flooded.
Try to restart the engine again following correct starting procedures.
(→ P. 1 5 9 )
●There may be a malfunction in the engine immobilizer system. ( →P. 6 9 )
One of the following may be the cause of the problem:
●The battery terminal connections may be loose or corroded.
●The battery may be discharged. ( →P. 5 0 2 )
The engine starting system may be malfunctioning due to an electrical problem
such as electronic key battery depletion or a blown fuse. However, an interim
measure is available to start the engine. ( →P. 4 9 7 )
If the engine will not start
If the engine will not start even though correct starting procedures are being
followed ( →P. 159), consider each of the following points:
The engine will not start even though the starter motor operates nor-
mally.
The starter motor turns over slowly , the interior lights and headlights
are dim, or the horn does not so und or sounds at a low volume.
The starter motor does not turn over

4978-2. Steps to take in an emergency
8
When trouble arises
IS350/250_U (OM53C50U)
One of the following may be the cause of the problem:
●One or both of the battery terminals may be disconnected.
●The battery may be discharged. (→P. 5 0 2 )
●There may be a malfunction in the steering lock system.
Contact your Lexus dealer if the problem cannot be repaired, or if repair procedures
are unknown.
When the engine does not start, the following steps can be used as an interim
measure to start the engine if the engine switch is functioning normally:
Set the parking brake.
Shift the shift lever to P.
Turn the engine switch to ACCESSORY mode.
Press and hold the engine switch for about 15 seconds while depressing the
brake pedal firmly.
Even if the engine can be started using the above steps, the system may be mal-
functioning. Have the vehicle inspected by your Lexus dealer.
The starter motor does not turn over , the interior lights and headlights
do not turn on, or the horn does not sound.
Emergency start function
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