steering LEXUS RX450H 2020 Workshop Manual

3604-5. Using the driving support systems
RX350/RX350L_U
■Screen description Vehicle center guide line
The line indicates the estimated vehicle center on the ground.
Vehicle width guide line
The line indicates a guide path when the vehicle is being backed straight up.
The displayed width is wider th an the actual vehicle width.
The line aligns with the estimated course lines when the steering wheel is straight.
Estimated course lines
The lines show an estimated course when the steering wheel is turned.
Distance guide line
The line moves, together with the estimated course lines, in sync with the steering
wheel. The line shows points approximately 1.5 ft. (0.5 m) (red) and approximately
3 ft. (1 m) (yellow) from the center of the edge of the bumper.
Distance guide line
The line shows distance behind the vehicle, a point approximately 1.5 ft. (0.5 m)
(blue) from the edge of the bumper.
Estimated course line display mode
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3614-5. Using the driving support systems
4
Driving
RX350/RX350L_U
■Parking operation
When parking in a space which is in the reverse direction to the space
described in the procedure below, the steering directions will be reversed.
Shift the shift lever to R.
Turn the steering wheel so that
the estimated course lines are
within the parking space, and
back up slowly. Parking space
Estimated course lines
When the rear position of the
vehicle has entered the parking
space, turn the steering wheel so
that the vehicle width guide lines
are within the left and right divid-
ing lines of the parking space. Vehicle width guide line
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3624-5. Using the driving support systems
RX350/RX350L_U
Once the vehicle width guide lines and the parking space lines are parallel,
straighten the steering wheel and back up slowly until the vehicle has com-
pletely entered the parking space.
Stop the vehicle in an approp riate place, and finish parking.
■Screen description
Vehicle width guide lines
These lines indicate a guide path when the vehicle is being backed straight
up. The displayed width is wider than the actual vehicle width.
Parking assist guide lines
These lines indicate the path of the sm allest turn possible behind the vehi-
cle.
These lines also indicate the approx imate position of the steering wheel
when parking.
Distance guide line
This line (red) indicates points approxim ately 1.5 ft. (0.5 m) behind the rear
bumper of your vehicle.
Vehicle center guide line
The line indicates the estimated vehicle center on the ground.
Parking assist guide line display mode
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3634-5. Using the driving support systems
4
Driving
RX350/RX350L_U
■Parking operation
When parking in a space which is in the reverse direction to the space
described in the procedure below, the steering directions will be reversed.
Shift the shift lever to R.
Back up until the parking assist
guide line meets the edge of the
left-hand dividing line of the park-
ing space. Parking assist guide line
Parking space dividing line
Turn the steering wheel all the way to the right, and back up slowly.
Once the vehicle is parallel with the parking space, straighten the steering
wheel and back up slowly until the vehicle has completely entered the
parking space.
Stop the vehicle in an approp riate place, and finish parking.
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3704-5. Using the driving support systems
RX350/RX350L_U
 The estimated course lines move even though the steering wheel is straight
There is a malfunction in the signals being
output by the steering sensor.Have the vehicle inspected by your Lexus
dealer.
Guide lines are not displayed
The back door is open.
Close the back door.
If this does not resolve the symptom, have
the vehicle inspected by your Lexus
dealer.
The estimated course lines are not displayed
• The steering wheel has been moved
while the battery was being reinstalled.
• Battery power is low.
• The steering sensor has been rein- stalled.
• There is a malfunction in the signals being output by the steering sensor.Stop the vehicle, and turn the steering
wheel as far as it will go to the left and
right.
If this does not resolve the symptom, have
the vehicle inspected by your Lexus
dealer.
Likely causeSolution

3714-5. Using the driving support systems
4
Driving
RX350/RX350L_U
WARNING
■When using the Lexus parking assist monitor system
The parking assist monitor is a supplemental device intended to assist the driver when
backing up. When backing up, be sure to check visually behind and all around the vehi-
cle before proceeding.
Observe the following precautions to avoid an accident that could result in death or
serious injuries.
●Never depend on the parking assist monitor entirely when backing up. The image
and the position of the guide lines displaye d on the screen may differ from the actual
state.
Use caution, just as you woul d when backing up any vehicle.
●Be sure to back up slowly, depressing the brake pedal to control vehicle speed.
●If you seem likely to hit nearby vehicles, obstacles, people or mount the shoulder,
depress the brake pedal to stop the vehicle.
●The instructions given are only guidelines.
When and how much to turn the steering wheel will vary according to traffic condi-
tions, road surface conditions, vehicle condit ion, etc. when parking. It is necessary to
be fully aware of this before using the parking assist system.
●When parking, be sure to check that the parking space will accommodate your vehi-
cle before maneuvering into it.
●Do not use the parking assist monitor in the following cases:
• On icy or slick road surfaces, or in snow
• When using tire chains or emergency tires
• When the back door is not closed completely
• On roads that are not flat or stra ight, such as curves or slopes.
●In low temperatures, the screen may darken or the image may become faint. The
image could distort when the vehicle is movi ng, or you may become unable to see the
image on the screen. Be sure to check dire ct visually and with the mirrors all around
the vehicle before proceeding.
●If the tire sizes are changed, the position of the guide lines displayed on the screen
may change.
●The camera uses a special lens. The distances between objects and pedestrians that
appear in the image displayed on the screen will differ from the actual distances.
(  P. 365)
●Estimated course line display mode: If the st eering wheel is straight and the vehicle
width guide lines and the estimated course lines are not in alignment, have the vehicle
inspected by your Lexus dealer.

3734-5. Using the driving support systems
4
Driving
RX350/RX350L_U
Vehicles without Adaptive Variable Suspension System
Normal mode
Provides an optimal balance of fuel economy, quietness, and dynamic perfor-
mance. Suitable for city driving.
Press the switch to change the driving mode to normal mode when Eco drive mode or
sport mode is selected.
Eco drive mode
Helps the driver accelerate in an eco-fr iendly manner and improve fuel econ-
omy through moderate throttle charact eristics and by controlling the opera-
tion of the air conditioning system (heating/cooling).
When not in Eco drive mode, if the driving mode select switch is turned to the left, the
Eco drive mode indicator will come on.
Sport mode
Controls the transmission and engine to provide quick, powerful acceleration.
This mode also changes the steering feel, making it suitable for when agile
driving response is desired, such as wh en driving on roads with many curves.
When not in sport mode, if the driving mode select switch is turned to the right, the
“SPORT” indicator will comes on.
Driving mode select switch
The driving modes can be selected to suit driving conditions.
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3754-5. Using the driving support systems
4
Driving
RX350/RX350L_U
Eco drive mode
Helps the driver accelerate in an eco-friendly manner and improve fuel econ-
omy through moderate throttle charact eristics and by controlling the opera-
tion of the air conditioning system (heating/cooling).
When not in Eco drive mode, if the driving mode select switch is turned to the left, the
Eco drive mode indicator will come on.
Sport mode
•SPORT S mode
Controls the transmission and engine to provide quick, powerful accelera-
tion. This mode is suitable for when agile driving response is desired, such
as when driving on roads with many curves.
When not in SPORT S mode, if the driving mode select switch is turned to the
right, the “SPORT S” indicator will come on.
•SPORT S+ mode
Helps to ensure steering performanc e and driving stability by simultane-
ously controlling the steeri ng and suspension in addition to the transmis-
sion and engine. Suitable for sportier driving.
When in SPORT S mode, if the driving mode select switch is turned to the right,
the “SPORT S+” indicator will come on.
FunctionSetting
Powertrain
Normal
Power
Eco
ChassisNormal
Sport
Air conditioning systemNormal
Eco
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3784-5. Using the driving support systems
RX350/RX350L_U
◆ABS (Anti-lock Brake System)
Helps to prevent wheel lock when the br akes are applied suddenly, or if the
brakes are applied while drivin g on a slippery road surface
◆Brake assist
Generates an increased level of br aking force after the brake pedal is
depressed when the system detects a panic stop situation
◆VSC (Vehicle Stability Control)
Helps the driver to contro l skidding when swerving suddenly or turning on
slippery road surfaces.
◆Enhanced VSC (Enhanced Vehicle Stability Control)
Provides cooperative control of the ABS, TRAC, VSC and EPS.
Helps to maintain directional stability when swerving on slippery road sur-
faces by controlling steering performance.
◆Trailer Sway Control
Helps the driver to control trailer sway by selectively applying brake pressure
for individual wheels and reducing dr iving torque when trailer sway is
detected.
◆TRAC (Traction Control)
Helps to maintain drive power and pr event the drive wheels from spinning
when starting the vehicle or accelerating on slippery roads
◆Hill-start assist control
Helps to reduce the backward movement of the vehicle when starting on an
uphill
◆EPS (Electric Power Steering)
Employs an electric motor to reduce the amount of effort needed to turn the
steering wheel
Driving assist systems
To keep driving safety and performance, the following systems operate auto-
matically in response to various drivin g situations. Be aware, however, that
these systems are supplementary and shou ld not be relied upon too heavily
when operating the vehicle.

3814-5. Using the driving support systems
4
Driving
RX350/RX350L_U
■Turning off both TRAC, VSC and Trailer Sway Control systems
To turn the TRAC, VSC and Trailer Sway Co ntrol systems off, press and hold for
more than 3 seconds whil e the vehicle is stopped.
The VSC OFF indicator light will come on an d the “Traction Control Turned Off” will be
shown on the multi-information display.
*
Press again to turn the systems back on.
*: On vehicles with PCS (Pre-Collision Sy stem), pre-collision brake assist and pre-
collision braking will also be disabled. The PCS warning light will come on and a
message will be displa yed on the multi-information display. (P. 290)
■When the message is displayed on the mu lti-information display showing that TRAC
has been disabled even if has not been pressed
TRAC cannot be operated. Contact your Lexus dealer.
■Operating conditions of hill-start assist control
When the following four conditions are met, the hill-start assist control will operate:
●The shift lever is in a position other than P or N (when starting off forward/backward on
an upward incline).
●The vehicle is stopped
●The accelerator pedal is not depressed
●The parking brake is not engaged
■Automatic system cancelation of hill-start assist control
The hill-start assist control will turn off in any of the following situations:
●The shift lever is shifted to P or N
●The accelerator pedal is depressed
●The parking brake is engaged
●2 seconds at maximum elapsed after the brake pedal is released
■Sounds and vibrations caused by the ABS, brake assist, VSC, Trailer Sway Control,
TRAC and hill-start assist control systems
●A sound may be heard from the engine compartment when the brake pedal is
depressed repeatedly, when the engine is started or just after the vehicle begins to
move. This sound does not indicate that a malfunction has occurred in any of these sys-
tems.
●Any of the following conditions may occur when the above systems are operating.
None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard also after the vehicle comes to a stop.
• The brake pedal may pulsate slig htly after the ABS is activated.
• The brake pedal may move down sl ightly after the ABS is activated.
■EPS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be heard.
This does not indicate a malfunction.