Trac off Lexus IS250 2012 Operating the lights and windshield wipers / LEXUS 2012 IS250,IS350 OWNERS MANUAL (OM53A87U)

198
2-4. Using other driving systems
To disable TRAC/VSCIf the vehicle gets stuck in fresh snow or mud, TRAC and VSC may
reduce power from the engine to th e wheels. You may need to turn the
system off to enable you to rock the vehicle in order to free it.
■ Turning off TRAC
Quickly push and release the
switch to turn off TRAC.
A message will be shown on the
multi-information display.
Push the switch again to turn the
system back on.
■Turning off TRAC and VSC
Push and hold the switch for more
than 3 seconds or more while the
vehicle is stopped to turn off
TRAC and VSC.
A message will be shown on the
multi-information display and the
VSC off indicator light will come
on.
Push the switch again to turn the
system back on.

199
2-4. Using other driving systems
2
When driving
■When the message is displayed on the multi-information display showing that
TRAC has been disabled even if the VSC off switch has not been pressed
TRAC and hill-start assist control cannot be operated. Contact your Lexus dealer.
■Automatic reactivation of the TRAC/VSC systems
If the TRAC/VSC systems are turned off, re-starting the engine will automatically
reactivate them.
■Automatic TRAC reactivation
If only the TRAC system is turned off, the TRAC system will turn on when vehicle
speed increases.
■Automatic TRAC and VSC reactivation
If the TRAC and VSC systems are turned off, the systems will not turn on even when
vehicle speed increases.
■Sounds and vibrations caused by the ABS, brake assist, VSC, TRAC and hill-start
assist control systems
●A sound may be heard from the engine compartment if the brake pedal is
depressed repeatedly when the engine is started or just after the vehicle begins
to move. This sound does not indicate th at a malfunction has occurred in any of
these systems.
●Any of the following conditions may occur when the above systems are operat-
ing. 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 after the vehicle comes to a stop.
• The brake pedal may pulsate slightly when the ABS is activated.
• The brake pedal may move down s lightly after the ABS is activated.

200
2-4. Using other driving systems
■Hill-start assist control is operational when
●The shift lever is in the D or S position.
●The brake pedal is not depressed.
●The vehicle rolls backward.
■EPS operation sound
When the steering wheel operates, a motor sound (whirring sound) may be heard.
This does not indicate a malfunction.
■Reduced 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.
■If the slip indicator comes on
It may indicate a malfunction in the VSC, TRAC or hill start assist control function.
Contact your Lexus dealer.
CAUTION
■The ABS does not operate effectively when
●The limits of tire gripping performance have been exceeded.
●The vehicle hydroplanes while driving at high speed on the wet or slick road.
■Stopping distance when the ABS is operating may exceed that of normal condi-
tions
The ABS is not designed to shorten the vehicle’s stopping dist ance. Always main-
tain a safe distance from the vehicle in front of you in the following situations.
●When driving on dirt, gravel or snow-covered roads
●When driving with tire chains
●When driving over bumps in the road
●When driving over roads with potholes or roads with uneven surfaces

201
2-4. Using other driving systems
2
When driving
CAUTION
■TRAC 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.
■If hill-start assist control does not operate effectively
(vehicles with an automatic transmission)
Do not overly rely on the hill-start assist co ntrol. The hill-start assist control may not
operate effectively on steep incl ines and roads covered in ice.
■When the VSC is activated
The slip indicator light flashes. Always drive carefully. Reckless driving may cause
an accident, resulting in death or serious injury. Exercise particular care when the
indicator light flashes.
■When TRAC and VSC are off
Be especially careful and drive at a speed appropriate to the road conditions. As
these are systems to help enhance vehicle stability and driving force, do not turn off
TRAC and VSC unless necessary.
■Replacing tires
Make sure that all tires are of the specified 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, VSC and TRAC systems will not func tion correctly if different tires are fit-
ted on the vehicle.
Contact your Lexus dealer for further info rmation when replacing tires or wheels.
■Handling 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.

235
3-2. Using the audio system
3
Interior features
■If the satellite radio does not operate normally
If a problem occurs with the XM
® tuner, a message will appear on the display. Refer
to the table below to identify the problem, and take the suggested corrective action.
“ANTENNA”
The XM® antenna is not connected. Check whether
the XM® antenna cable is attached securely.
There is a short-circuit in the antenna or the surround-
ing antenna cable. See a Lexus certified dealer.
“UNAUTH”
You have not subscribed to the XM® Satellite Radio.
The radio is being updated with the latest encryption
code. Contact the XM
® Satellite Radio for subscrip-
tion information. When a co ntract is canceled, you can
choose the “CH000” and all free-to-air channels.
The premium channel you selected is not authorized.
Wait for about 2 seconds until the radio returns to the
previous channel or “CH001”. If it does not change
automatically, select another channel. If you want to lis-
ten to the premium channel, contact XM
® Satellite
Radio.
“NO SIGNAL”
The XM® signal is too weak at the current location.
Wait until your vehicle reaches a location with a stron-
ger signal.
“LOADING”The unit is acquiring audio or program information.
Wait until the unit has received the information.
“OFF AIR”The channel you selected is not broadcasting any pro-
gramming. Select another channel.
“-----”
There is no song/program title or artist name/feature
associated with the channel at that time. No action
needed.

273
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 until you hear a
beep.
Some audio features can be controlled using the switches on the steering
wheel.
Turns the power on, selects
an audio source
Increases/decreases volume
Radio mode: Selects a radio
station
CD mode: Selects a track, file (MP3 and
WMA) and disc
Bluetooth
® audio mode:
Selects a track and
album
iPod mode: Selects a song
USB memory mode: Selects a file and folder

382
4-1. Maintenance and care
Cleaning and protecting the vehicle interior
The following procedures will help protect your vehicle's interior and keep
it in top condition:
■ Protecting the vehicle interior
Remove dirt and dust using a vacuum cleaner. Wipe dirty surfaces
with a cloth dampened with lukewarm water.
■ Cleaning the leather areas
●Remove dirt and dust using a vacuum cleaner.
● Wipe any excess dirt and dust with a soft cloth dampened with
diluted detergent.
Use a diluted water solution of approximately 5% neutral wool
detergent.
● Wring out any excess water from the cloth and thoroughly wipe
off all remaining traces of detergent.
● Wipe the surface with a dry, so ft cloth to remove any remaining
moisture. Allow the leather to dry in a shaded and ventilated area.
■ Synthetic leather areas
●Remove loose dirt using a vacuum cleaner.
● Apply a mild soap solution to th e synthetic leather using a sponge
or soft cloth.
● Allow the solution to soak in fo r a few minutes. Remove the dirt
and wipe off the solution with a clean, damp cloth.

5
When trouble arises
473
5-2. Steps to take in an emergency
Follow the correction procedures.After taking the specified steps to co rrect the suspected problem, check
that the warning light turns off.
Warning lightWarning light/Details
(U.S.A.)

(Canada)
ABS warning light
Indicates a malfunction in:
•The ABS;
• The brake assist system.
Electric power steering system warning lightIndicates a malfunction in the EPS (Electric Power Steering)
system.
Slip indicatorIndicates a malfunction in:
• The VSC system;
•The TRAC system; or
• The hill-start assist control system
Warning lightWarning light/DetailsCorrection procedure
Open door warning light
(warning buzzer)
*1
Indicates that a door or the
trunk is not fully closed.
Check that all doors and the
trunk are closed.
Low fuel level warning lightRemaining fuel
(Approximately 2.9 gal. [11 L,
2.4 Imp. gal.] or less)
Refuel the vehicle.
(On the instru-ment cluster)
Driver’s seat belt reminder
light (warning buzzer)
*2
Warns the driver to fasten
his/her seat belt.Fasten the seat belt.

516
5-2. Steps to take in an emergency
If the vehicle becomes stuck
CAUTION
■When attempting to free a stuck vehicle
If you choose to rock the vehicle back and forth to free it, make sure the surround-
ing area is clear, to avoid striking other vehicles, objects or persons. The vehicle
may also lunge forward or lunge back suddenly as it becomes free. Use extreme
caution.
■When shifting the shift lever
With automatic transmission vehicles, be careful not to shift the shift lever with the
accelerator pedal depressed.
This may lead to unexpected rapid acceleration of the vehicle that may cause an
accident and result in death or serious injury.
Carry out the following procedures if the tires spin or the vehicle becomes
stuck in mud, dirt, or snow.
Stop the engine. Set the parking brake and shift the shift lever
to P (vehicles with an automatic transmission) or N (vehicles
with a manual transmission).
Remove the mud, snow, or sand from around the stuck tire.
Place wood, stones or some ot her material to help provide
traction under the tires.
Restart the engine.
Shift the shift lever to the D or R position (vehicles with an auto-
matic transmission) or 1 or R position (vehicles with a manual
transmission), release the parking brake and carefully apply
the accelerator to free the vehicle.
Turn off TRAC and VSC if these functions are hampering your
attempts to free the vehicle. (  P. 1 9 8 )
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