
2424-1. Before driving
RX350/RX200t_EE_OM48F32E
■Tire information
●Increase the tire inflation pressure to 20.0 kPa (0.2 kgf/cm2 or bar, 3 psi) greater than the recommended value when towing. ( P. 737)
●Increase the air pressure of the trailer tires in accordance with the total trailer weight
and according to the values recommended by the manufacturer of your trailer.
■Break-in schedule
Lexus recommends that vehicles fitted with new power train components should not be
used for towing trailers for the first 800 km (500 miles).
■Safety checks before towing
●Check that the maximum load limit for the towing hitch/bracket hitch ball is not
exceeded. Bear in mind that the coupling weight of the trailer will add to the load exerted on the vehicle. Also make sure that you will not be towing a load that exceeds the maximum permissible axle capacity.
●Ensure that the trailer load is secure.
●Supplementary outside rear view mirrors shou ld be added to the vehicle if the traffic behind cannot be clearly seen with standard mirrors. Adjust the extending arms of
these mirrors on both sides of the vehicle so that they always provide maximum visibility of the road behind.
■Maintenance
●Maintenance must be performed more frequently when using the vehicle for towingdue to the greater weight burden placed on the vehicle compared to normal driving.
●Retighten all bolts securing the hitching ball and bracket after towing for approximately
1000 km (600 miles).

2434-1. Before driving
4
Driving
RX350/RX200t_EE_OM48F32E
Your vehicle will handle differently when towing a trailer. In order to avoid acci-
dent, death or serious injury, keep the following in mind when towing:
■Checking connections between trailer and lights
Stop the vehicle and check the operation of the connection between the
trailer and lights after driving for a brief period as well as before starting off.
■Practicing driving with a coupled trailer
●Get the feel for turning, stopping an d reversing with the trailer coupled by
practicing in an area with no or light traffic.
●When reversing with a coupled trailer, hold the section of the steering
wheel nearest to you and rotate clockwise to turn the trailer left or
counterclockwise to turn it right. Always rotate a little at a time to prevent
steering error. Have someone guide you when reversing to lessen the risk
of an accident.
■Increasing vehicle-to-vehicle distance
At a speed of 10 km/h (6 mph), the distance to the vehicle running ahead of
you should be equivalent to or greater than the combined length of your vehi-
cle and trailer. Avoid sudden braking that may cause skidding. Otherwise, the
vehicle may spin out of control. This is especially true when driving on wet or
slippery road surfaces.
■Sudden acceleration/steering input/cornering
Executing sharp turns when towing may result in the trailer colliding with your
vehicle. Decelerate well in advance when approaching turns and take them
slowly and carefully to avoid sudden braking.
■Important points regarding turning
The wheels of the trailer will travel clos er to the inside of the curve than the
wheels of the vehicle. To make allowance for this, take the turns wider than you
would normally do.
Guidance

2444-1. Before driving
RX350/RX200t_EE_OM48F32E
■Important points regarding stability
Vehicle movement resulting from unev en road surfaces and strong cross-
winds will affect handling. The vehicle may also be rocked by passing buses or
large trucks. Frequently check behind when moving alongside such vehicles.
As soon as such vehicle movement occurs, immediately start to decelerate
smoothly by slowly applying the brakes. Always steer the vehicle straight
ahead while braking.
■Passing other vehicles
Consider the total combined length of your vehicle and trailer and ensure that
the vehicle-to-vehicle distance is sufficient before executing lane changes.
■Transmission information
To maintain engine braking efficiency and charging system performance,
when using engine braking, do not use the transmission in D. If in the M mode,
the transmission shift range position must be in 4 or lower. ( P. 251)
■If the engine overheats
Towing a loaded trailer up a long, steep incline in temperatures exceeding
30 C (85F) may result in the engine overheating. If the engine coolant tem-
perature gauge indicates that the engine is overheating, turn the air condition-
ing off immediately, leave the road and stop the vehicle in a safe place.
( P. 718)
■When parking the vehicle
Always place wheel chocks under the wheels of both the vehicle and trailer.
Set the parking brake and shift the shift lever to P.

2454-1. Before driving
4
Driving
RX350/RX200t_EE_OM48F32E
WARNING
Follow all the instructions described in this section. Failure to do so could cause an accident resulting in death or serious injury.
■Trailer towing precautions
When towing, make sure that none of the weight limits are exceeded. ( P. 239)
■To avoid accident or injury
●Vehicles with a compact spare tire: Do not tow a trailer when the compact spare tire is installed on your vehicle.
●Vehicles with the emergency tire puncture repair kit:
Do not tow a trailer when the tire installed is repaired with the emergency tire punc- ture repair kit.
●Do not use the following systems when trailer towing.
• Cruise control*• Dynamic radar cruise control with full-speed range*• LKA (Lane-Keeping Assist)*
• PCS (Pre-Crash Safety system)*• BSM (Blind Spot Monitor)*
*: If equipped
■Vehicle speed in towing
Observe the legal maximum sp eeds for trailer towing.
■Before descending hills or long declines
Reduce speed and downshift. However, never downshift suddenly while descending
steep or long downhill grades.
■Operation of the brake pedal
Do not hold the brake pedal depressed often or for long periods of time.
Doing so may result in the brake ov erheating or reduce braking effects.
NOTICE
■Do not directly splice trailer lights
Directly splicing trailer lights may damage yo ur vehicle’s electrical system and cause a malfunction.

2734-3. Operating the lights and wipers
4
Driving
RX350/RX200t_EE_OM48F32E
●Bicycles or similar objects may not be detected.
●In the following situations the system may not be able to correctly detect the surround- ing brightness level. This may cause the low beams to remain on or the high beams to
flash or dazzle pedestrians or vehicles ahead. In such a case, it is necessary to manually switch between the high and low beams.
• When driving in inclement weather (heavy rain, snow, fog, sandstorms, etc.)
• When the windshield is obscured by fog, mist, ice, dirt, etc. • When the windshield is cracked or damaged• When the camera sensor is deformed or dirty
• When the temperature of the camera sensor is extremely high • When the surrounding brightness level is equa l to that of headlights, tail lights or fog lights
• When headlights or tail lights of vehicles ah ead are turned off, dirty, changing color, or not aimed properly• When the vehicle is hit by water, snow, dust, etc. from a preceding vehicle
• When driving through an area of interm ittently changing brightness and darkness • When frequently and repeatedly driving ascending/descending roads, or roads withrough, bumpy or uneven surfaces (such as stone-paved roads, gravel roads, etc.)
• When frequently and repeatedly taking curves or driving on a winding road • When there is a highly reflective object ahead of the vehicle, such as a sign or mirror• When the back of a preceding vehicle is highly reflective, such as a container on a
truck • When the vehicle’s headlights are damaged or dirty, or are not aimed properly• When the vehicle is listing or tilting due to a flat tire, a trailer being towed, etc.
• When the headlights are changed between the high beams and low beams repeat- edly in an abnormal manner• When the driver believes that the high beams may be flashing or dazzling pedestri-
ans or other drivers • When the vehicle is used in an area in which vehicles travel on the opposite side of
the road of the country for which the vehicle was designed, for example using a vehi- cle designed for right-hand traffic in a left-hand traffic area, or vice versa
■Customization
Some functions can be customized. ( P. 740)

2774-3. Operating the lights and wipers
4
Driving
RX350/RX200t_EE_OM48F32E
●In the following situations the system may not be able to correctly detect the surround- ing brightness level. This may cause the low beams to remain on or the high beams to flash or dazzle pedestrians or vehicles ahead. In such a case, it is necessary to manually
switch between the high and low beams.
• When driving in inclement weather (heavy rain, snow, fog, sandstorms, etc.) • When the windshield is obscured by fog, mist, ice, dirt, etc.
• When the windshield is cracked or damaged • When the camera sensor is deformed or dirty• When the temperature of the camera sensor is extremely high
• When the surrounding brightness level is equa l to that of headlights, tail lights or fog lights• When headlights or tail lights of vehicles ah ead are turned off, dirty, changing color,
or not aimed properly • When the vehicle is hit by water, snow, dust, etc. from a preceding vehicle• When driving through an area of interm ittently changing brightness and darkness
• When frequently and repeatedly driving ascending/descending roads, or roads with rough, bumpy or uneven surfaces (such as stone-paved roads, gravel roads, etc.)• When frequently and repeatedly taking curves or driving on a winding road
• When there is a highly reflective object ahead of the vehicle, such as a sign or mirror • When the back of a preceding vehicle is highly reflective, such as a container on atruck
• When the vehicle's headlights are damaged or dirty, or are not aimed properly • When the vehicle is listing or titling due to a flat tire, a trailer being towed, etc. • When the headlights are changed between the high beams and low beams repeat-
edly in an abnormal manner • When the driver believes that the high beams may be flashing or dazzling pedestri-ans or other drivers
• When the vehicle is used in an area in which vehicles travel on the opposite side of the road of the country for which the vehicle was designed, for example using a vehi-
cle designed for right-hand traffic in a left-hand traffic area, or vice versa

3104-5. Using the driving support systems
RX350/RX200t_EE_OM48F32E
■Situations in which the system may not operate properly
●In some situations such as the following, a vehicle may not be detected by the radar sensor and camera sensor, preventing the system from operating properly:
• If an oncoming vehicle is approaching your vehicle • If a vehicle ahead is a motorcycle or bicycle• When approaching the side or front of a vehicle
• If a preceding vehicle has a small rear end, such as an unloaded truck
• If a vehicle ahead is carrying a load which protrudes past its rear bumper
• If a vehicle ahead is irregularly sh aped, such as a tractor or side car
• If the sun or other light is shin ing directly on a vehicle ahead • If a vehicle cuts in front of your vehicle or emerges from beside a vehicle• If a vehicle ahead makes an abrupt mane uver (such as sudden swerving, accelera-
tion or deceleration) • When suddenly cutting behind a preceding vehicle
• When driving in inclement we ather such as heavy rain, fog, snow or a sandstorm • When the vehicle is hit by water, snow, dust, etc. from a vehicle ahead
• When driving through steam or smoke • When driving in a place where the surro unding brightness changes suddenly, such as at the entrance or exit of a tunnel
• When a very bright light, such as the sun or the headlights of oncoming traffic, shines directly into the camera sensor• When the surrounding area is dim, such as at dawn or dusk, or while at night or in a
tunnel
• If a preceding vehicle has a low rear end,
such as a low bed trailer
• If a vehicle ahead has extremely high
ground clearance
• When a vehicle ahead is not directly in front of your vehicle

3174-5. Using the driving support systems
4
Driving
RX350/RX200t_EE_OM48F32E
WARNING
■Before using LKA system
Do not rely solely upon the LKA system. LKA is not a system which automatically drives the vehicle or reduces the amount of attention that must be paid to the area in
front of the vehicle. The driver must always assume full responsibility for driving safely by always paying careful attention to the surrounding conditions and operate the steer-ing wheel to correct the path of the vehicle. Also, make sure to take adequate breaks
when fatigued, such as from driv ing for a long period of time. Failure to perform appropriate driving operat ions and pay careful attention may lead to an accident, resulting in death or serious injury.
■To avoid operating LKA by mistake
When not using the LKA system, use the LKA switch to turn the system off.
■Situations unsuitable for LKA
Do not use the LKA system in the following situations. The system may not operate properly and le ad to an accident, resulting in death or serious injury.
●A spare tire, tire chains, etc., are equipped.
●When the tires have been excessively worn, or when the tire inflation pressure is low.
●Tires which differ by structure, manufacturer, brand or tread pattern are used.
●Objects or patterns that could be mistaken for white (yellow) lines are present on the side of the road (guardrails, cu rbs, reflective poles, etc.).
●Vehicle is driven on a snow-covered road.
●White (yellow) lines are difficult to see due to rain, snow, fog, dust, etc.
●Asphalt repair marks, white (yellow) line marks, etc., are present due to road repair.
●Vehicle is driven in a temporary lane or restricted lane due to construction work.
●Vehicle is driven on a road surface which is slippery due to rainy weather, fallen snow, freezing, etc.
●Vehicle is driven in traffic lanes other than on highways and freeways.
●Vehicle is driven in a construction zone.
●When your vehicle is towing a trailer or during emergency towing
■Preventing LKA system malfunctions and operations performed by mistake
●Do not modify the headlights or place stic kers, etc., on the surface of the lights.
●Do not modify the suspension etc. If the suspension etc. needs to be replaced, con- tact any authorized Lexus dealer or repair er, or another duly qualified and equipped
professional.
●Do not install or place anything on the hood or grille. Also, do not install a grille guard (bull bars, kangaroo bar, etc.).
●If your windshield needs repairs, contact any authorized Lexus dealer or repairer, oranother duly qualified an d equipped professional.