2014 Lexus IS250 parking brake

2384-5. Using the driving support systems
IS350/250_U (OM53758U)
■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 engine of f. The EPS system should return to normal
within 10 minutes.
■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 moved to P or N.
●The accelerator pedal is depressed.
●The parking brake is engaged.
●Approximately 2 seconds elapse after the brake pedal is released.

2394-5. Using the driving support systems
4
Driving
IS350/250_U (OM53758U)
CAUTION
■The ABS does not operate effectively when
●The limits of tire gripping performance have been exceeded (such as excessively
worn tires on a snow covered road).
●The vehicle hydroplanes while driving at high speed on wet or slick roads.
■Stopping distance when the ABS is operating may exceed that of normal conditions
The ABS is not designed to shorten the vehicle’s stopping distance. Always maintain a
safe distance from the vehicle in front of you, especially 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 uneven surfaces
■TRAC may not operate effectively when
Directional control and power may not be achievable while drivin g on slippery road
surfaces, even if the TRAC system is operating.
Drive the vehicle carefully in conditions where stability and power may be lost.
■Hill- start assist control does not operate effectively when
●Do not overly rely on hill-start assist contro l. Hill-start assist control may not operate
effectively on steep inclines and roads covered with ice.
●Unlike the parking brake, hill-start assist control is not intended to hold the vehicle
stationary for an extended period of time. Do not attempt to use hill-start assist con-
trol to hold the vehicle on an incline, as doing so may lead to an accident.
■When the VSC is activated
The slip indicator light flashes. Always drive carefully. Reckless driving may cause an
accident. Exercise particular care when the indicator light flashes.
■When the TRAC/VSC systems are turned off
Be especially careful and drive at a speed appropriate to the road conditions. As these
are the systems to ensure vehicle stability and driving force, do not turn the TRAC/
VSC systems off 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 infla-
tion pressure level.
The ABS, TRAC and VSC systems will not function correctly if different tires are
installed on the vehicle.
Contact your Lexus dealer for further information when replacing tires or wheels.
■Handling of tires and the suspension
Using tires with any kind of problem or modi fying the suspension will affect the driving
assist systems, and may caus e a system to malfunction.

2554-6. Driving tips
4
Driving
IS350/250_U (OM53758U)
Park the vehicle and move the shift lever to P without setting the parking brake.
The parking brake may freeze up, preventing it from being released. If necessary,
block the wheels to prevent inadvertent sliding or creeping.
Except vehicles with 18-inch tires
Use the correct tire chain size when mounting the tire chains.
Chain size is regulated for each tire size.
Side chain
(0.12 in. [3 mm] in diameter)
Cross chain
(0.16 in. [4 mm] in diameter)
Vehicles with 18-inch tires
Tire chains cannot be mounted.
Snow tires should be used instead.
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 1 /4
 1 /2 mile (0.5  1.0 km).
●Install tire chains following the instru ctions provided with the tire chains.
When parking the vehicle
Selecting tire chains
1
2
Regulations on the use of tire chains

3947-2. Maintenance
IS350/250_U (OM53758U)
Vehicle interior
ItemsCheck points
Accelerator pedal• The accelerator pedal should move smoothly (with- out uneven pedal effort or catching).
Automatic transmission
“Park” mechanism• When parked on a slope and the shift lever is in P, isthe vehicle securely stopped?
Brake pedal
• Does the brake pedal move smoothly?
• Does the brake pedal have appropriate clearance
from the floor? ( P. 5 0 6 )
• Does the brake pedal have the correct amount of
free play? ( P. 5 0 6 )
Brakes
• The vehicle should not pull to one side when the
brakes are applied.
• The brakes should work effectively.
• The brake pedal should not feel spongy.
• The brake pedal should not get too close to the floor when the brakes are applied.
Head restraints• Do the head restraints move smoothly and lock
securely?
Indicators/buzzers• Do the indicators and buzzers function properly?
Lights• Do all the lights come on?
Parking brake
• Moves smoothly?
• When parked on a slope and the parking brake is on,is the vehicle securely stopped?
Seat belts•Do the seat belt s operate smoothly?
• The seat belts should not be damaged.
Seats• Do the seat controls operate properly?
Steering wheel
• Does the steering wheel rotate smoothly?
• Does the steering wheel have the correct amount of free play?
• There should not be an y strange sounds coming
from the steering wheel.

4518-2. Steps to take in an emergency
8
When trouble arises
IS350/250_U (OM53758U)
If your Lexus is transported by a flat bed
truck, it should be tied down at the
locations shown in the illustration.
If you use chains or cables to tie down
your vehicle, the angles shaded in black
must be 45.
Do not overly tighten the tie downs or
the vehicle may be damaged.
■Before emergency towing Release the parking brake.
Shift the shift lever to N.
Turn the engine switch to ACCESSORY (e ngine off) or IGNITION ON (engine run-
ning) mode.
Using a flat bed truck
CAUTION
Observe the following precautions.
Failure to do so may result in death or serious injury.
■Caution while towing
●Use extreme caution when towing the vehicle.
Avoid sudden starts or erratic driving mane uvers which place excessive stress on the
emergency towing eyelets and the cables or chains. Always be cautious of the sur-
roundings and other vehicles while towing.
●If the engine is not running, the power assist for the brakes and steering will not func-
tion, making steering and braking more difficult.
■Installing towing eyelets to the vehicle
Make sure that towing eyelets are installed securely.
If not securely installed, towing ey elets may come loose during towing.
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2
3

4578-2. Steps to take in an emergency
8
When trouble arises
IS350/250_U (OM53758U)
*1: Parking brake engaged warning buzzer: P. 4 6 4
*2: Open door warning buzzer:
 P. 4 6 3
*3: Driver’s seat belt buzzer:
The driver’s seat belt buzzer sounds to alert the driver that his or her seat belt is not
fastened. Once the engine switch is turned to IGNITION ON mode, the buzzer
sounds for 6 seconds. If the vehicle reaches a speed of 12 mph (20 km/h), the buzzer
sounds once. If the seat belt is still unfast ened after 24 seconds, the buzzer will sound
intermittently for 10 seconds. Then, if the seat belt is still unfastened, the buzzer will
sound in a different tone for 20 more seconds.
Front passenger’s seat belt buzzer:
The front passenger’s seat belt buzzer sounds to alert the front passenger that his or
her seat belt is not fastened. The buzzer sounds once if the vehicle reaches a speed of
12 mph (20 km/h). If the seat belt is still unfastened after 24 seconds, the buzzer will
sound intermittently for 10 seconds. Then, if the seat belt is still unfastened, the buzzer
will sound in a different tone for 20 more seconds.
Tire pressure warning light When the light comes on:
Low tire inflation pressure such as
• Natural causes ( P. 4 5 8 )
•Flat tire ( P. 4 7 5 )
 Adjust the tire inflation pressure to the specified level.
The light will turn off after a fe w minutes. In case the light does
not turn off even if the tire inflation pressure is adjusted, have the
system checked by your Lexus dealer.
When the light comes on after blinking for 1 minute:
Malfunction in the tire pressure warning system
 Have the system checked by your Lexus dealer.
Warning lightWarning light/Details/Actions

4648-2. Steps to take in an emergency
IS350/250_U (OM53758U)
Indicates that the vehicle is being driven at 3 mph (5 km/
h) or more with the parking brake still engaged. A buzzer also sounds.
 Release the parking brake.
Indicates that the shift lever was used to attempt to shift
to the first gear position in M mode on a slippery road
surface
The gear position will not sh ift from the second gear.
A buzzer also sounds.
 Drive the vehicle in the second or a higher gear
position.
Indicates a malfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates a malfunction in:
• The ABS; or
• The brake assist system
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates that the engine coolant temperature is too high
A buzzer also sounds.
 P. 4 9 4
(If equipped)
Indicates that the radar sensor is dirty or covered with
ice
A buzzer also sounds.
 Clean the sensor.
(If equipped)
Indicates that the dynamic radar cruise control system is
unable to judge vehicle-to-vehicle distance
A buzzer also sounds.
 Tu r n o f f s n o w m o d e .
If the windshield wipers are on, turn them off or set
them to a mode other than AUTO or high speed
wiper operation.
Wa r n i n g m e s s a g eDetails/Actions
(U.S.A.) (Canada) (Flashes)
(U.S.A.) (Canada)

4758-2. Steps to take in an emergency
8
When trouble arises
IS350/250_U (OM53758U)
●Stop the vehicle on a hard, flat surface.
●Set the parking brake.
●Shift the shift lever to P.
●Stop the engine.
●Turn on the emergency flashers. (P. 4 4 6 )
If you have a flat tire
Remove the flat tire and replace it with the spare tire provided.
For details about tires: P. 4 1 1
CAUTION
■If you have a flat tire
Do not continue driving with a flat tire.
Driving even a short distance with a flat ti re can damage the tire and the wheel beyond
repair, which could result in an accident.
Before jacking up the vehicle