Page 2 of 652

TABLE OF CONTENTSIndex
RX350/270_EE
2
1-1. Key information
Keys ...................................................... 26
1-2. Opening, closing and
locking the doors
Smart entry & start system ........... 31
Wireless remote control .............. 53
Side doors .......................................... 56
Back door........................................... 60
1-3. Adjustable components
(seats, mirrors,
steering wheel)
Front seats.......................................... 73
Rear seats ........................................... 77
Driving position memory .............. 81
Head restraints................................. 87
Seat belts ............................................ 89
Steering wheel ................................. 94
Anti-glare inside rear view
mirror ................................................ 96
Outside rear view mirrors........... 981-4. Opening and closing
the windows and
moon roof
Power windows ............................... 101
Moon roof ........................................ 104
Electronic sunshade..................... 108
1-5. Refueling
Opening the fuel tank cap........... 110
1-6. Theft deterrent system
Engine immobilizer system ......... 115
Double locking system ................. 121
Alarm ................................................. 122
1-7. Safety information
Correct driving posture ............. 129
SRS airbags ....................................... 131
Child restraint systems ............... 142
Installing child restraints ............. 152
Airbag manual on/off
system ............................................. 163
1Before driving
For vehicles with a navigation system, refer to the “Navigation System Owner’s
Manual” for information regarding the equipment listed below.
• Navigation system
• Air conditioning controls
• Windshield wiper de-icer
• Lexus parking assist monitor• Audio/video system
• Rear window and outside rear view
mirror defogging
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Page 25 of 652

1Before driving
25
RX350/270_EE
1-1. Key information
Keys .............................................. 26
1-2. Opening, closing and
locking the doors
Smart entry & start system ..... 31
Wireless remote control ........ 53
Side doors ................................... 56
Back door.................................... 60
1-3. Adjustable components
(seats, mirrors,
steering wheel)
Front seats .................................. 73
Rear seats .................................... 77
Driving position memory ........ 81
Head restraints ......................... 87
Seat belts..................................... 89
Steering wheel .......................... 94
Anti-glare inside rear
view mirror............................... 96
Outside rear view mirrors ..... 981-4. Opening and closing
the windows and
moon roof
Power windows ......................... 101
Moon roof.................................. 104
Electronic sunshade.............. 108
1-5. Refueling
Opening the fuel tank
cap ............................................. 110
1-6. Theft deterrent system
Engine immobilizer
system ....................................... 115
Double locking system ........... 121
Alarm .......................................... 122
1-7. Safety information
Correct driving posture ........ 129
SRS airbags................................ 131
Child restraint systems .......... 142
Installing child restraints ....... 152
Airbag manual on/off
system ...................................... 163
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37
1-2. Opening, closing and locking the doors
1
Before driving
RX350/270_EE
■Conditions affecting operation
The smart entry & start system uses weak radio waves. In the following situations,
the communication between the electronic key and the vehicle may be affected,
preventing the smart entry & start system, wireless remote control and immobilizer
system from operating properly.
(Ways of coping: →P. 5 9 1 )
●When the electronic key battery is depleted
●Near a TV tower, electric power plant, gas station, radio station, large display,
airport or other facility that generates strong radio waves or electrical noise
●When carrying a portable radio, cellular phone, cordless phone or other wire-
less communication device
●When the electronic key is in contact with, or is covered by the following metal-
lic objects
• Cards to which aluminum foil is attached
• Cigarette boxes that have aluminum foil inside
• Metallic wallets or bags
•Coins
• Hand warmers made of metal
• Media such as CDs and DVDs
●When multiple electronic keys are in the vicinity
●When another wireless key (that emits radio waves) is being used nearby
●When carrying the electronic key together with the following devices that emit
radio waves
• Another vehicle's electronic key or a wireless key that emits radio waves
• Personal computers or personal digital assistants (PDAs)
• Digital audio players
• Portable game systems
●If window tint with a metallic content or metallic objects are attached to the rear
window
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115
1
Before driving
RX350/270_EE
1-6. Theft deterrent system
Engine immobilizer system
The vehicle's keys have built-in transponder chips that prevent the engine
from starting if the key has not been previously registered in the vehicle's
on-board computer.
Never leave the keys inside the vehicle when you leave the vehicle.
This system is designed to help prevent vehicle theft but does not guaran-
tee absolute security against all vehicle thefts.
Vehicles with a navigation system
The indicator light flashes after
the “ENGINE START STOP”
switch has been turned off to
indicate that the system is oper-
ating.
The indicator light stops flashing
after the “ENGINE START
STOP” switch has been turned
to ACCESSORY or IGNITION
ON mode to indicate that the
system has been canceled.
Vehicles without a navigation system
The indicator light flashes after
the “ENGINE START STOP”
switch has been turned off to
indicate that the system is oper-
ating.
The indicator light stops flashing
after the “ENGINE START
STOP” switch has been turned
to ACCESSORY or IGNITION
ON mode to indicate that the
system has been canceled.
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Page 116 of 652
116
1-6. Theft deterrent system
RX350/270_EE
■System maintenance
The vehicle has a maintenance-free type engine immobilizer system.
■Conditions that may cause the system to malfunction
●If the grip portion of the key is in contact with a metallic object
●If the key is in close proximity to or touching a key to the security system (key
with a built-in transponder chip) of another vehicle
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117
1-6. Theft deterrent system
1
Before driving
RX350/270_EE
■Certifications for the engine immobilizer system
This system meets the certification requirements of Radio Law.
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183
2-1. Driving procedures
2
When driving
RX350/270_EE
■If the engine does not start
The engine immobilizer system may not have been deactivated. (→P. 1 1 5 )
Contact any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional immediately.
■Steering lock
After turning the “ENGINE START STOP” switch off and opening and closing the
doors, the steering wheel will be locked due to the steering lock function. Operat-
ing the “ENGINE START STOP” switch again automatically cancels the steering
lock.
■When the steering lock cannot be released
■Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, the motor may be suspended
if the engine is turned on and off repeatedly in a short period of time. In this case,
refrain from operating the engine. After about 2 seconds, the steering lock motor
will resume functioning.
■When the “ENGINE START STOP” switch indicator flashes in amber
The system may be malfunctioning. Have the vehicle inspected by any authorized
Lexus dealer or repairer, or another duly qualified and equipped professional,
immediately.
■If the electronic key battery is depleted
→P. 5 0 1The green indicator light on the “ENGINE
START STOP” switch will flash and a mes-
sage will be shown on the multi-information
display. Press the “ENGINE START STOP”
switch again while turning the steering wheel
left and right.
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5
587
5-2. Steps to take in an emergency
When trouble arises
RX350/270_EE
If the engine will not start
If the engine will not start even though correct starting procedures are
being followed (→P. 180), consider each of the following points.
■The engine will not start, even though the starter motor operates
normally.
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 proce-
dures. (→P. 1 8 0 )
●There may be a malfunction in the engine immobilizer system.
(→P. 115)
■The starter motor turns over slowly, the interior lights and head-
lights are dim, or the horn does not sound or sounds at a low vol-
ume.
One of the following may be the cause of the problem:
●The battery may be discharged. (→P. 5 9 4 )
●The battery terminal connections may be loose or corroded.
■The starter motor does not turn over.
The engine starting system may be malfunctioning due to an electri-
cal problem such as an open circuit or a blown fuse. However, an
interim measure is available to start the engine. (→P. 588)
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