wheel LEXUS IS250 2016 Service Manual

188
2-4. Using other driving systems
To disable TRAC and/or VSC
If the vehicle gets stuck in fresh snow or mud, TRAC and VSC may
reduce power from the engine to the wheels. You may need to turn the
system off to enable you to rock the vehicle in order to free it.
nTurning off TRAC
Quickly push and release the but-
ton to turn off TRAC.
A message will be shown on the
multi-information display.
Push the button again to turn the
system back on.
nTurning off TRAC and VSC
Push and hold the button for more
than 3 seconds while the vehicle is
stopped to turn off TRAC and
VSC.
A message will be shown on the
multi-information display and VSC
off indicator light will come on.
Push the button again to turn the
system back on.

190
2-4. Using other driving systems
nHill-start assist control is operational when
lThe shift lever is in the D or S position.
lThe brake pedal is not depressed.
nEPS operation sound
When the steering wheel operates, a motor sound (whirring sound) may be heard.
This does not indicate a malfunction.
nReduced effectiveness of EPS
The effectiveness of EPS 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 engine OFF. The system should return to normal within
10 minutes.
CAUTION
nThe ABS does not operate effectively when
lThe limits of tire gripping performance have been exceeded.
lThe vehicle hydroplanes while driving at high speed on the wet or slick road.
nStopping distance when the ABS is operating will exceed that of normal condi-
tions
The ABS is not designed to shorten the vehicle’s stopping distance. Always main-
tain a safe distance from the vehicle in front of you in the following situations.
lWhen driving on dirt, gravel or snow-covered roads
lWhen driving with tire chains
lWhen driving over bumps in the road
lWhen driving over roads with potholes or roads with uneven roads

191
2-4. Using other driving systems
2

When driving
CAUTION
nTRAC may not operate effectively when
Directional control and power may not be achievable while driving on slippery road
surfaces, even if the TRAC system is operating.
Do not drive the vehicle in conditions where stability and power may be lost.
nIf hill-start assist control does not operate effectively
(vehicles with an automatic transmission)
The hill-start assist control may not operate effectively on steep inclines and roads
covered in ice.
nWhen the VSC is activated
The slip indicator light flashes and a warning buzzer sounds. Always drive carefully.
Reckless driving may cause an accident. Exercise particular care when the indica-
tor light flashes and a buzzer sounds.
nWhen TRAC and VSC are off
Be especially careful and drive at a speed appropriate to the road conditions. As
there are systems to ensure vehicle stability and driving force, do not turn off TRAC
and VSC unless necessary.
nReplacing tires
Make sure that all tires are of the same size, brand, tread pattern and total load
capacity. In addition, make sure that the tires are inflated to the recommended tire
pressure level.
The ABS and VSC systems will not function correctly if different tires are fitted on
the vehicle.
Contact your Lexus dealer for further information when replacing tires or wheels.
nHandling of tires and suspension
Using tires with any kind of problem or modifying the suspension will affect the driv-
ing assist systems, and may cause the system to malfunction.

202
2-5. Driving information
nSnow chain installation
Observe the following precautions when installing and removing chains.
lInstall and remove tire chains in a safe location.
lInstall tire chains on the rear tires only. Do not install tire chains on front tires.
lInstall the tire chains on rear tires as tightly as possible. Retighten chains after
driving 1 /4 - 1 /2 mile (0.5 - 1.0 km).
lInstall tire chains following the instructions provided in the accompanying
instructions.
CAUTION
nDriving with snow tires
Observe the following precautions to reduce the risk of accidents.
Failing to do so may result in a loss of vehicle control and cause death or serious
injury.
lUse tires of the size specified for your vehicle.
lMaintain the recommended level of air pressure.
lDo not drive in excess of 75 mph (120 km/h), regardless of the type of snow tires
being used.
lUse snow tires on all, not just some wheels.
nDriving with snow chains
Observe the following precautions to reduce the risk of accidents.
Failing to do so may result in the vehicle being unable to be driven safely, and may
cause death or serious injury.
lDo not drive in excess of the speed limit specified for the tire chains being used,
or 30 mph (50 km/h), whichever is lower.
lAvoid driving on bumpy road surfaces or over potholes.
lAvoid sudden turns and braking, as use of chains may adversely affect vehicle
handling.
lSlow down sufficiently before entering a curve to ensure that vehicle control is
maintained.

204
2-5. Driving information
Trailer towing
Lexus does not recommend towing a trailer with your vehicle. Lexus also
does not recommend the installation of a tow hitch or the use of a tow hitch
carrier for a wheelchair, scooter, bicycle, etc. Your Lexus is not designed
for trailer towing or for the use of tow hitch mounted carriers.

205
2-5. Driving information
2

When driving Dinghy towing (vehicles with an automatic transmission)
NOTICE
nTo avoid serious damage to your vehicle
Do not tow your vehicle with four wheels on the ground.
Your vehicle is not designed to be dinghy towed (with 4 wheels on the
ground) behind a motor home.

206
2-5. Driving information
Dinghy towing (vehicles with a manual transmission)
Towing your vehicle with 4 wheels on the ground
To prevent damage to your vehicle, perform the following procedures
before towing.
Shift the shift lever to neutral.
Switch to ACCESSORY mode. (→P. 1 2 8 )
Ensure that the audio system and other powered devices have been
turned off.
Release the parking brake.
After towing, leave the engine in idle for at least 3 minutes before driv-
ing the vehicle.
nNecessary equipment and accessories
Specialized equipment and accessories are required for dinghy towing. Contact
the service branch of the motor home manufacturer regarding recommended
equipment.
Your vehicle can be dinghy towed in a forward direction (with 4 wheels on
the ground) behind a motor home.
STEP1
STEP2
STEP3

245
3-2. Using the audio system
3

Interior features
Using the steering wheel audio switches
Turning on the power
Press when the audio system is turned off.
The audio system can be turned off by holding down for 1 second or
more.
Changing the audio source
Press when the audio system is turned on. The audio source
changes as follows each time is pressed. If no discs are inserted in
the player, that mode will be skipped.
FM1→FM2→CD changer→AUX→AM→SAT1→SAT2→SAT3
Adjusting the volume
Press “+” on to increase the volume and “-” to decrease the vol-
ume.
Hold down to continue increasing or decreasing the volume.
Some audio features can be controlled using the switches on the steering
wheel.
Turns the power on, select
audio source
Vo l u m e
Radio: Select radio stations
CD: Select tracks, files (MP3
and WMA) and discs

246
3-2. Using the audio system
Selecting a radio station
Press to select the radio mode.
Press “∧” or “∨” on to select a radio station.
To scan for receivable stations, press and hold until you hear a
beep.
Selecting a track/file
Press to select the CD mode.
Press “∧” or “∨” on to select the desired track/file.
Selecting a disc in the CD player
Press to select the CD mode.
Press and hold “∧” or “∨” on until a beep is heard.
CAUTION
nTo reduce the risk of an accident
Exercise care when operating the audio switches on the steering wheel.
STEP1
STEP2
STEP1
STEP2
STEP1
STEP2

262
3-5. Other interior features
nChanging the settings
Each item is displayed and its setting can be changed only in the following condi-
tions:
lIntuitive parking assist: When the “ENGINE START STOP” switch is in IGNI-
TION ON mode.
lItems other than the above: When the “ENGINE START STOP” switch is in
IGNITION ON mode and the vehicle is stopped.
nDisplay
The display will return to the original display if the satellite switches are not oper-
ated for an extended period.
Even if the display is in satellite switch mode, it will switch in the event of a warning
or when the radar cruise control (if equipped) is used. If this occurs, press any of the
satellite switches or “DISP” switch on the steering wheel to return the display to sat-
ellite switch mode.