steering Lexus IS300h 2017 Repair Manual

3244-5. Using the driving support systems
IS300h_EE(OM53D89E)
■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.
1
2
1
2
3
4
5

3314-5. Using the driving support systems
4
Driving
IS300h_EE(OM53D89E)
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 any autho- rized Lexus retailer or Lexus authorized
repairer, or any reliable repairer.
 Guide lines are not displayed
The trunk lid is open.
Close the trunk lid.
If this does not resolve the symptom, have the vehicle inspected by any authorized
Lexus retailer or Lexus authorized
repairer, or any reliable repairer.
 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 any authorized
Lexus retailer or Lexus authorized
repairer, or any reliable repairer.
Likely causeSolution

3324-5. Using the driving support systems
IS300h_EE(OM53D89E)
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 chec k 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 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 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 trunk lid 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. 326)
●Estimated course line display mode: If the steering wheel is straight and the vehicle
width guide lines and the estimated course li nes are not in alignment, have the vehicle
inspected by any authorized Lexus retailer or Lexus authorized repairer, or any reli- able repairer.

3484-5. Using the driving support systems
IS300h_EE(OM53D89E)
Vehicles without Adaptive Variable Suspension System
Normal mode
Provides an optimal balance of fuel ec onomy, 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 hybrid system to prov ide quick, powerful acceleration. This
mode also changes the steering feel, maki ng it suitable for when agile driving
response is desired, such as when driving on roads with many curves.
When not in sport mode and the driving mode select switch is turned to the right, the “SPORT” indicator comes on, and the hybrid system indicator changes to the
tachometer. ( P. 105)
Driving mode select switch
The driving modes can be selected to suit driving conditions.
Except F SPORT
models
F SPORT
models
1
2
3

3504-5. Using the driving support systems
IS300h_EE(OM53D89E)
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
•SPORT S mode
Controls the hybrid system to prov ide quick, powerful acceleration. This
mode is suitable for when agile drivin g response is desired, such as when
driving on roads with many curves.
When not in sport mode and the driving mode select switch is turned to the right, the “SPORT” indicator comes on, and the hy brid system indicator changes to the
tachometer. ( P. 105)
•SPORT S+ mode
Helps to ensure steering performanc e and driving stability by simultane-
ously controlling the steering and suspension in addition to the hybrid sys-
tem. 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
2
3

3524-5. Using the driving support systems
IS300h_EE(OM53D89E)
◆ECB (Electronically Controlled Brake System)
The electronically controlled system generates braking force corresponding
to the brake operation
◆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.
◆VSC+ (Vehicle Stability Control+)
Provides cooperative control of the ABS, TRC, VSC and EPS.
Helps to maintain directional stability when swerving on slippery road sur-
faces by controlling steering performance.
◆TRC (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 help enhance driving safety and pe rformance, the following systems oper-
ate automatically in response to various driving situations. Be aware, however,
that these systems are supplementary and should not be relied upon too heav-
ily when operating the vehicle.

3554-5. Using the driving support systems
4
Driving
IS300h_EE(OM53D89E)
■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 of f 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
●Approximately 2 seconds elapse after the brake pedal is released
■When the 12-volt battery is disconnected
The steering wheel may move fr om its straight forward position, but this will be corrected
automatically when driving.
■Sounds and vibrations caused by the ABS, brake assist, TRC, VSC and hill-start assist control systems
●A sound may be heard from the engine compartment when the brake pedal is
depressed repeatedly, when the hybrid system is started or just after the vehicle begins to move. This sound does not indicate that a malfunction has occurred in any of these
systems.
●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.
■ECB operating sound
ECB operating sound may be heard in the followi ng cases, but it does not indicate that a
malfunction has occurred.
●Operating sound heard from the engine compartment when the brake pedal is oper- ated.
●Motor sound of the brake system heard from the front part of the vehicle when the
driver’s door is opened.
●Operating sound heard from the engine compartment when one or two minutes
passed after the stop of the hybrid system.
■EPS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be heard.
This does not indicate a malfunction.

3564-5. Using the driving support systems
IS300h_EE(OM53D89E)
■Automatic reactivation of TRC and VSC systems
After turning the TRC and VSC systems off, the systems will be automatically re-enabled in the following situations:
●When the power switch is turned off
●If only the TRC system is tu rned off, the TRC will turn on when vehicle speed increases If both the TRC and VSC syst ems are turned off, automatic re-enabling will not occur
when vehicle speed increases.
■Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the system from overheating
when there is frequent steering input over an extended period of time. The steering
wheel may feel heavy as a result . Should this occur, refrain from excessive steering input or stop the vehicle and turn the hybrid system off. The EPS system should return to nor-
mal within 10 minutes.
■Operating conditions of emergency brake signal
When the following three conditions are me t, the emergency brake signal will operate:
●The emergency flashers are off
●Actual vehicle speed is over 55 km/h (35 mph)
●The brake pedal is depressed in a manner that cause the system to judge from the vehi-
cle deceleration that this is a sudden braking operation
■Automatic system cancelation of emergency brake signal
The emergency brake signal will turn of f in any of the following situations:
●The emergency flashers are turned on
●The brake pedal is released
●The system judges from the vehicle deceleration that is not a sudden braking operation

3634-6. Driving tips
4
Driving
IS300h_EE(OM53D89E)
Regulations regarding the use of tire chains vary depending on location and type
of road. Always check local regulations before installing chains.
■Tire chain installation
Observe the following precautions wh en installing and removing chains:
●Install and remove tire chains in a safe location.
●Install tire chains on the rear tires. Do not install tire chains on the front tires.
●Install tire chains on rear tires as tightly as possible. Retighten chains after driving 0.5
 1.0 km (1/4  1/2 mile).
●Install tire chains following the instructions provided with the tire chains.
Regulations on the use of tire chains
WARNING
■Driving with snow tires
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in a loss of vehi cle control and cause death or serious injury.
●Use tires of the specified size.
●Maintain the recommended level of air pressure.
●Do not drive at speeds in excess of the speed limit or the speed limit specified for the snow tires being used.
●Use snow tires on all, not just some wheels.
●Do not use LKA (Lane Keeping Assist) system.
■Driving with tire chains (excep t vehicles with 18-inch tires)
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in the vehicle being unable to be driven safely, and may cause death or serious injury.
●Do not drive in excess of th e speed limit specified for the tire chains being used, or 50
km/h (30 mph), whichever is lower.
●Avoid driving on bumpy road surfaces or over potholes.
●Avoid sudden acceleration, abrupt steering, sudden braking and shifting operations
that cause sudden engine braking.
●Slow down sufficiently before entering a cu rve to ensure that vehicle control is main-
tained.

366
IS300h_EE(OM53D89E)
5-1. Basic Operations
Lexus Display Audio
system ..........................................368
Steering wheel audio
switches....................................... 374
USB/AUX ports ........................ 375
5-2. Setup
Setup menu .................................. 378
General settings......................... 379
Voice settings .............................. 382
Display settings ...........................383
5-3. Using the audio system
Selecting the audio
source ..........................................385
Optimal use of the audio
system ..........................................386
Audio settings ............................. 387
Audio menu screen
operation ..................................... 391
5-4. Using the radio
Radio operation.......................... 394
5-5. Playing an audio CD and
MP3/WMA/AAC discs
CD player operation ................ 396