2017 TOYOTA YARIS iA brake

191
YARIS iA_OM_OM99N89z_(U)
3-5. Brake
3
When Driving
Hill Launch Assist (HLA)∗
For vehicles with a manual transaxle, Hill Launch Assist (HLA) oper-
ates on a downward slope when the shift lever is in the reverse (R)
position, and on an upward slope when the shift lever is in a position
other than the reverse (R) position.
For vehicles with an automatic transaxle, Hill Launch Assist (HLA)
operates on a downward slope when the shift lever is in the reverse
(R) position, and on an upward slope when the shift lever is in a for-
ward gear.
● Hill Launch Assist (HLA) does not operate on a gentle slope. In addition, the
gradient of the slope on which the system will operate changes depending
on the vehicle’s load.
● Hill Launch Assist (HLA) does not operate if the parking brake is applied, the
vehicle has not stopped completely, or the clutch pedal is released.
● While Hill Launch Assist (HLA) is operating, the brake pedal may feel stiff
and vibrate, however, this does not indicate a malfunction.
● Hill Launch Assist (HLA) does not operate while the TCS/DSC indicator light
is illuminated.
Refer to Warning/Indicator Lights on P. 156.
● Hill Launch Assist (HLA) does not turn off even if the DSC OFF switch is
pressed to turn off the TCS/DSC.
∗: If equipped
Hill Launch Assist (HLA) is a function which assists the driver in
accelerating from a stop while on a slope. When the driver
releases the brake pedal and depresses the accelerator pedal
while on a slope, the function prevents the vehicle from rolling.
The braking force is maintained automatically after the brake
pedal is released on a steep grade.

192
YARIS iA_OM_OM99N89z_(U)
3-5. Brake
WARNING
■Do not rely completely on Hill Launch Assist (HLA)
Hill Launch Assist (HLA) is an auxiliary device for accelerating from a stop
on a slope. The system only operates for about two seconds and therefore,
relying only on the system, when accelerating from a stop is dangerous
because the vehicle may move (roll) unexpectedly and cause an accident.
The vehicle could roll depending on the vehicle’s load or if it is towing some-
thing. In addition, for vehicles with a manual transaxle, the vehicle could sti\
ll
roll depending on how the clutch pedal or the accelerator pedal is operated.
Always confirm the safety around the vehicle before starting to drive the
vehicle.

193
YARIS iA_OM_OM99N89z_(U)
3-6. ABS/TCS/DSC
3
When Driving
Antilock Brake System (ABS)
The driver will feel a slight vibration in the brake pedal and may hear a
chattering noise from the brake system. This is normal ABS system
operation. Continue to depress the brake pedal without pumping the
brakes.
The warning light turns on when the system has a malfunction.
Refer to Warning Lights on P. 157.
● Braking distances may be longer on loose surfaces (snow or gravel, for
example) which usually have a hard foundation. A vehicle with a normal
braking system may require less distance to stop under these conditions
because the tires will build up a wedge of surface layer when the wheels
skid.
● The sound of the ABS operating may be heard when starting the engine or
immediately after starting the vehicle, however, it does not indicate a mal-
function.
The ABS control unit continuously monitors the speed of each
wheel. If one wheel is about to lock up, the ABS responds by
automatically releasing and reapplying that wheel’s brake.
WARNING
■ Do not rely on ABS as a substitute for safe driving
The ABS cannot compensate for unsafe and reckless driving, excessive
speed, tailgating (following another vehicle too closely), driving on ic\
e and
snow, and hydroplaning (reduced tire friction and road contact because of
water on the road surface). You can still have an accident.

194
YARIS iA_OM_OM99N89z_(U)
3-6. ABS/TCS/DSC
Traction Control System (TCS)
The warning light turns on when the system has a malfunction.
Refer to Warning Lights on P. 157.
To turn off the TCS, press the DSC OFF switch ( →P. 197).
The Traction Control System (TCS) enhances traction and safety
by controlling engine torque and braking. When the TCS detects
driving wheel slippage, it lowers engine torque and operates the
brakes to prevent loss of traction.
This means that on a slick surface, the engine adjusts automati-
cally to provide optimum power to the drive wheels, limiting
wheel spin and loss of traction.
WARNING
■ Do not rely on the Traction Control System (TCS) as a substitute for
safe driving
The Traction Control System (TCS) cannot compensate for unsafe and
reckless driving, excessive speed, tailgating (following another vehicle too
closely), and hydroplaning (reduced tire friction and road contact because
of water on the road surface). You can still have an accident.
■ Use snow tires or tire chains and drive at reduced speeds when roads
are covered with ice and/or snow
Driving without proper traction devices on snow and/or ice-covered roads is
dangerous. The Traction Control System (TCS) alone cannot provide ade-
quate traction and you could still have an accident.

YARIS iA_OM_OM99N89z_(U)
1953-6. ABS/TCS/DSC
3
When Driving
This indicator light stays on for a
few seconds when the ignition is
switched ON. If the TCS or DSC is
operating, the indicator light
flashes.
If the light stays on, the TCS, DS C or the brake assist system may
have a malfunction and they may not operate correctly. Take your
vehicle to your Toyota dealer.
● In addition to the indicator light flashing, a slight lugging sound will come
from the engine. This indicates that the TCS/DSC is operating properly.
● On slippery surfaces, such as fresh snow, it will be impossible to achieve
high rpm when the TCS is on.
TCS/DSC Indicator Light

YARIS iA_OM_OM99N89z_(U)
1973-6. ABS/TCS/DSC
3
When Driving
This indicator light stays on for a
few seconds when the ignition is
switched ON. If the TCS or DSC is
operating, the indicator light
flashes.
If the light stays on, the TCS, DS C or the brake assist system may
have a malfunction and they may not operate correctly. Take your
vehicle to your Toyota dealer.
This indicator light stays on for a
few seconds when the ignition is
switched ON.
It also illuminates when the DSC
OFF switch is pressed and TCS/
DSC is switched off.
Refer to DSC OFF Switch on P. 197.
If the light remains illuminated and the TCS/DSC is not switched off,
take your vehicle to your Toyota dealer. The DSC may have a mal-
function.
Press the DSC OFF switch to turn
off the TCS/DSC. The DSC OFF
indicator light in the combination
meter will illuminate.
Press the switch again to turn the TCS/DSC back on. The DSC OFF
indicator light will turn off.
TCS/DSC Indicator Light
DSC OFF Indicator Light
DSC OFF Switch

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YARIS iA_OM_OM99N89z_(U)
3-6. ABS/TCS/DSC
●When DSC is on and you attempt to free the vehicle when it is stuck, or
drive it out of freshly fallen snow, the TCS (part of the DSC system) will acti-
vate. Depressing the accelerator will not increase engine power and freeing
the vehicle may be difficult. When this happens, turn off the TCS/DSC.
● If the TCS/DSC is off when the engine is turned off, it automatically activates
when the ignition is switched ON.
● Leaving the TCS/DSC on will provide the best traction.
● If the DSC OFF switch is pressed and held for 10 seconds or more, the DSC
OFF switch malfunction detection function operates and the DSC system
activates automatically. The DSC OFF indicator light turns off while the DSC
system is operative.
● Vehicles with Smart City Brake Support (SCBS):
If the Smart City Brake Support (SCBS) operates with the TCS/DSC turned
off, the TCS/DSC becomes operational automatically.

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YARIS iA_OM_OM99N89z_(U)
3-10. Active Safety System
Active Safety System∗
◆Pre-Crash Safety Technology
Pre-crash safety technology is designed to assist the driver in
averting collisions or re duce their severity in situations where they
cannot be avoided.
● Collision damage reduction in low vehicle speed range
Forward driving:
Smart City Brake Support (SCBS) ( →P. 205)
◆Sensor
● Laser sensor
The laser sensor emits a near-infrared laser beam and receives
the beam reflected off the reflec tive surface of a vehicle or
obstruction in front, and the detected beam is then used for mea-
surement. The laser sensor is used for the Smart City Brake
Support (SCBS) system.
The laser sensor is installed at the top of the windshield near the
rearview mirror.
Refer to Laser Sensor on P. 211.
∗: If equipped