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529
4-3. Do-it-yourself maintenance
4
Maintenance and care
RX350/270_EE
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
unavoidable 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 headlights or cause condensation to build up on the lens.
●Vehicles with discharge headlights:
While the low beam 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
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530
4-3. Do-it-yourself maintenance
RX350/270_EE
CAUTION
■Discharge headlights (if equipped)
●Contact any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional, before replacing 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
serious injury or death by electric shock.
●Do not attempt to take apart or repair the low beam discharge headlight bulbs,
connectors, power supply circuits, or related components.
Doing so could result in electric shock and serious injury or death.
■To prevent damage or fire
Make sure bulbs are fully seated and locked.
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Page 531 of 652

5When trouble arises
531
RX350/270_EE
5-1. Essential information
Emergency flashers .............. 532
If your vehicle needs to
be towed ................................ 533
If you think something
is wrong ................................... 541
Fuel pump shut off
system..................................... 5425-2. Steps to take in an
emergency
If a warning light turns
on or a warning buzzer
sounds... ................................ 543
If a warning message is
displayed ................................ 552
If you have a flat tire ............... 572
If the engine will not
start.......................................... 587
If the shift lever cannot be
shifted from P....................... 589
If you lose your keys .............. 590
If the electronic key
does not operate
properly ................................... 591
If the vehicle battery is
discharged ............................. 594
If your vehicle
overheats .............................. 598
If the vehicle becomes
stuck ......................................... 601
If your vehicle has to
be stopped in an
emergency ............................ 603
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532
RX350/270_EE
5-1. Essential information
Emergency flashers
■Emergency flashers
If the emergency flashers are used for a long time while the engine is not operating,
the battery may discharge.
The emergency flashers are used to warn other drivers when the vehicle
has to be stopped in the road due to a breakdown, etc.
Press the switch.
All the turn signal lights will flash.
To turn them off, press the switch
once again.
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5
543
When trouble arises
RX350/270_EE
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 any authorized
Lexus dealer or repairer, or another duly qualified and equipped profes-
sional.
*: Parking brake engaged warning buzzer
→P. 557
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 any authorized Lexus dealer or repairer, or another duly
qualified and equipped professional.
Warning lightWarning light/Details
Brake system warning light (warning buzzer)*
•Low brake fluid
• Malfunction in the brake 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 light
Indicates a malfunction in the vehicle’s charging system
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 nec-
essarily indicate a malfunction in the system.
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544
5-2. Steps to take in an emergency
RX350/270_EE
Have the vehicle inspected immediately.
Failing 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 any authorized Lexus dealer or repairer, or another
duly qualified and equipped professional immediately.
Warning lightWarning light/Details
Malfunction indicator lamp
Indicates a malfunction in:
• 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; or
• The seat belt pretensioner 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
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5
545
5-2. Steps to take in an emergency
When trouble arises
RX350/270_EE
Warning lightWarning light/Details
(Flashes)
Pre-crash safety system warning light (if equipped)
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. 2 8 0 )
• The light will turn on when the pre-crash braking is disabled.
(→P. 2 8 1 )
• The light will turn on when the system cannot temporarily be
used. (→P. 557)
Slip indicator
Indicates a malfunction in:
• The VSC system;
• The TRC system; or
• The hill-start assist control system
(Flashes)
“AFS OFF” indicator (if equipped)
Indicates a malfunction in the adaptive front-lighting system
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546
5-2. Steps to take in an emergency
RX350/270_EE
Follow the correction procedures.
After taking the specified steps to correct the suspected problem, check
that the warning light goes off.
Warning lightWarning light/DetailsCorrection procedure
Open door warning light
(warning buzzer)
*1
Indicates that one or more of
the doors is not fully closed.
Check that all the doors are
closed.
Low fuel level warning light
Indicates remaining fuel is
approximately 10.7 L (2.8
gal., 2.3 Imp. gal.) or less
Refuel the vehicle.
(On the instru-
ment panel)
Driver’s seat belt
reminder light
(warning buzzer)
*2
Warns the driver to fasten
his/her seat belt.
Fasten the seat belt.
(On the center
panel)
Front passenger’s seat belt
reminder light
(warning buzzer)
*2
Warns the front passenger to
fasten his/her seat belt.
Fasten the seat belt.
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. 552
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