steering Lexus ES300h 2015 Do-it-yourself maintenance / (OM33B99U) Service Manual

ES350_300h_OM_OM33B99U_(U)
2714-5. Using the driving support systems
4
Driving
CAUTION
■When the sensor may not be correctly detecting the vehicle ahead
Apply the brakes as necessary when any of the following types of vehicles are in
front of you.
As the sensor may not be able to correc tly detect these types of vehicles, the
approach warning ( P. 264) will not be activated, and a fatal or serious accident
may result.
●Vehicles that cut in suddenly
●Vehicles traveling at low speeds
●Vehicles that are not moving
●Vehicles with small rear ends (trailers with no load on board etc.)
●Motorcycles traveling in the same lane
●When water or snow thrown up by the surrounding vehicles hinders the function-
ing of the sensor
●When your vehicle is pointing upwards (caused by a heavy load in the trunk etc.)
■Conditions under which the vehicle-to-veh icle distance control may not function
correctly
Apply the brakes as necessary in the following conditions as the radar sensor may
not be able to correctly detect vehicles ahead, and a fatal or serious accident may
result:
●When the road curves or when the lanes are narrow
●When steering wheel operation or your position in the lane is unstable
●When the vehicle ahead of you decelerates suddenly

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4-5. Using the driving support systems
■When changing the tires
Depending on the tires used, sufficient performance may not be maintainable.
■Warning messages for LDA system
Warning messages are used to indicate a system malfunction or to inform the driver
of the need for caution while driving. (P. 639, 646)
CAUTION
■Before using the LDA system
Do not rely solely on the LDA system. The LDA system does not drive the vehicle
automatically, nor does it reduce the amount of care you need to take. As such, the
driver must always assume full responsi bility for understanding his/her surround-
ings, for operating the steering wheel to correct the driving line, and for driving
safely.
Inappropriate or negligent driving could lead to an accident.
■To avoid operating the LDA by mistake
Switch the LDA system off using the “LDA” switch when not in use.
■Situations unsuitable for LDA system
Do not use LDA system in any of the following situations.
Otherwise, the system may not function co rrectly and could result in an accident.
●When driving with tire chains, a spare tire, or similar equipment
●When there are objects or structures along the roadside that might be misinter-
preted as lane markers (such as guardrails, curb, reflector posts, etc.)
●When driving on snowy roads
●When pavement lane markers are difficult to see due to rain, snow, fog, sand, dirt,
etc.
●When there are visible lines on the pavement from road repairs, or if the remains
of old lane markers are still visible on the road
●When driving on a road with lane closures due to maintenance, or when driving
in a temporary lane

ES350_300h_OM_OM33B99U_(U)
2954-5. Using the driving support systems
4
Driving
■Screen display
The parking assist monitor screen
will be displayed if the shift posi-
tion is shifted to R while the
“START STOP ENGINE”
<“POWER”> switch is in
IGNITION ON <ON> mode.Intuitive parking assist display
(if equipped)
If an obstacle is detected while the intuitive parking assist is on, a display is
shown in the top right corner of the screen.
■Using the system
Use any of the following modes.
●Estimated course line display mode ( P. 2 9 8 )
Estimated course lines are dis-
played which move in accor-
dance with the operation of the
steering wheel.
Using the Lexus parking assist monitor
A

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4-5. Using the driving support systems
●Parking assist guide line display mode (P. 300)
The steering wheel return
points (parking assist guide
lines) are displayed.
●Distance guide line display mode
Distance guide lines only are
displayed.

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4-5. Using the driving support systems
■Screen descriptionVehicle width guide line
The line indicates a guide path when th e vehicle is being backed straight up.
The displayed width is wider than 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 estimate d course lines, in sync with the steer-
ing 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.
Vehicle center guide line
The line indicates the estimated vehicle center on the ground.
Estimated course line display mode
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2
3
4
5

ES350_300h_OM_OM33B99U_(U)
2994-5. Using the driving support systems
4
Driving
■Parking operation
When parking in a space which is in the reverse direction to the space
described in the procedure belo w, the steering directions will be
reversed.
Shift the shift position to R position.
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 park-
ing space, turn the steering
wheel so that the vehicle width
guide lines are within the left
and right dividing lines of the
parking space. Vehicle width guide line
1
2
1
2
3
3

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Once the vehicle width guide lines and the parking space lines are
parallel, straighten the steering wh eel and back up slowly until the
vehicle has completely en tered the parking space.
Stop the vehicle in an appropriate 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 pa th of the smallest turn possible behind the
vehicle.
These lines also indicate the ap proximate position of the steering
wheel when parking.
Distance guide line
This line (red) indicates points approximately 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
4
5
1
2
3
4

ES350_300h_OM_OM33B99U_(U)
3014-5. Using the driving support systems
4
Driving
■Parking operation
When parking in a space which is in the reverse direction to the space
described in the procedure belo w, the steering directions will be
reversed.
Shift the shift position to R position.
Back up until th e parking assist
guide line meets the edge of
the left-hand dividing line of
the parking 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 th e parking space, straighten the
steering wheel and back up slowly until the vehicle has completely
entered the parking space.
Stop the vehicle in an appropriate place, and finish parking.
1
2
1
2
3
4
5

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4-5. Using the driving support systems
The guide lines are very far out of alignment
The camera position is out of alignment.Have the vehicle inspected by your
Lexus dealer.
• The vehicle is tilted (there is a heavy
load on the vehicle, tire pressure is
low due to a tire puncture, etc.)
• The vehicle is used on an incline.If this happens due to these causes, it
does not indicate a malfunction.
Back up while visually checking the
vehicle’s surroundings.
 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 trunk is open.
Close the trunk.
If this does not resolve the symptom,
have the vehicle inspected by your
Lexus dealer.
The estimated course lines are not displayed
• 12-volt 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

ES350_300h_OM_OM33B99U_(U)
3094-5. Using the driving support systems
4
Driving
CAUTION
■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 vehicle 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 guid e lines displayed on the screen may differ from the
actual state.
Use caution, just as you would 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 con-
ditions, road surface conditions, vehicle condition, etc. when parking. It is neces-
sary 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
vehicle 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 trunk is not closed completely
• On roads that are not flat or straight, 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 moving, or you may become unable to
see the image on the screen. Be sure to check direct visually and with the mirrors
all around the vehicle before proceeding.