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Maintenance and care
IS250C/350C_U■
Back-up light
Open the trunk lid and remove the
trunk panel cover clips.
Partly remove the trunk panel
cover and turn bulb bases
counterclockwise.
Remove the light bulb.
STEP1
STEP2
STEP3
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4-3. Do-it-yourself maintenance
IS250C/350C_U■
Rear turn signal lights
Open the trunk lid and remove the
covers.
Remove the bolts and unit.
Turn the bulb base counterclock-
wise.
Remove the light bulb.
STEP1
STEP2
STEP3
STEP4
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Maintenance and care
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Bulbs other than the above
If any of the bulbs listed below has burnt out, have your Lexus dealer
replace it.
●Headlight low beams (vehicles with halogen bulbs)
● Headlight high and low beams (vehicles with discharge bulbs)
● Front fog lights
● Parking/daytime running lights (vehicles with discharge headlights)
● Front turn signal lights
● Front side marker lights
● Side turn signal lights
● Stop/tail lights
● Tail lights
● Rear side marker lights
● High mounted stoplight
● License plate lights
■When replacing the front left headlight high beam and parking light bulbs (vehi-
cles with halogen headlights)
Remove the securing bolt and move the
washer fluid filler opening to allow easy
access to the light bulbs.
After replacing the bulbs, make sure to
secure the washer fluid filler opening with the
bolt.
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■Condensation build-up on the inside of the lens
Contact your Lexus dealer for more information in the following situations. Tempo-
rary condensation build-up on the inside of the headlight lens does not indicate a
malfunction.
●Large drops of water are built up on the inside of the lens.
●Water has built up inside the headlight.
■Discharge headlights (if equipped)
If voltage to the discharge bulbs is insufficient, the bulbs may not come on, or may
go out temporarily. The discharge bulbs will come on when normal power is
restored.
■LED light bulbs
The parking lights (vehicles with discharge headlights), front side marker lights, side
turn signal lights, tail lights, stop/tail lights, high mounted stoplight, rear side marker
lights and license plate lights 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.
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. Hold the bulb by
the plastic or metal portion.
If the bulb is scratched or dropped it may blow out or crack.
●Fully install light bulbs and any parts used to secure them. Failing to do so may
result in heat damage, fire, or water entering the headlight unit. This may damage
the headlights or cause condensation to build up on the lens.
●Do not attempt to take apart or repair the low beam headlight bulbs, connectors,
power supply circuits, or related components.
Doing so could result in electric shock and serious injury or death.
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Maintenance and care
IS250C/350C_U
CAUTION
■Discharge headlights (if equipped)
●Contact your Lexus dealer before replacing discharge headlights (including light
bulbs).
●Do not touch the high-intensity discharge headlight’s high voltage socket when
the headlights are turned on.
An extremely high voltage of 20000 V will be discharged and could result in
serious injury or death by electric shock.
■To prevent damage or fire
Make sure bulbs are fully seated and locked.
Page 482 of 626

When trouble arises5
481
IS250C/350C_U
5-1. Essential informationEmergency flashers.............. 482
If your vehicle needs to be towed................................ 483
If you think something is wrong ...................................... 489
Fuel pump shut off system.... 490 5-2. Steps to take in an
emergency
If a warning light turns on or a warning buzzer
sounds... .................................. 491
If a warning message is displayed................................ 500
If you have a flat tire (vehicles with standard
tires) ......................................... 513
If you have a flat tire (vehicles with run-flat
tires) ........................................ 522
If the engine will not start .... 524
If the shift lever cannot be shifted from P ....................... 526
If you lose your keys .............. 527
If the electronic key does not operate properly.......... 528
If the vehicle battery is discharged ............................ 532
If your vehicle overheats ..... 536
If the vehicle becomes stuck........................................ 539
If the retractable hardtop does not close ...................... 540
If your vehicle has to be stopped in an
emergency ............................ 550
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IS250C/350C_U
5-1. Essential information
Emergency flashers
NOTICE
■To prevent battery discharge
Do not leave the emergency flashers on longer than necessary when the engine is
not running.
Use the emergency flashers if the vehicle malfunctions or is involved in an
accident.
Press the switch to flash all the
turn signal lights. To turn them
off, press the switch once again.
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5
When trouble arises
491
IS250C/350C_U
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer sounds...
Stop the vehicle immediately. Continuing to drive the vehicle may be dangerous.
The following warning indicates a possible problem in the brake system.
Immediately stop the vehicle in a safe place and contact your Lexus
dealer.
*: Parking brake engaged warning buzzer
→P. 5 0 3
Stop the vehicle immediately.
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.
Warning lightWarning light/Details
(U.S.A.)
(Canada)
Brake system warning light (warning buzzer)*
• Low brake fluid
• Malfunction in the brake booster system This light also comes on when the parking brake is not
released. If the light turns off after the parking brake is fully
released the system is operating normally.
Warning lightWarning light/Details
Charging system warning lightIndicates a malfunction in the vehicle’s charging system.
Calmly perform the following actions if any of the warning lights turn on or
flash. If a light turns on or flashes, but then turns off, this does not necessar-
ily indicate a malfunction in the system.