Toyota C-HR (2019 year). Manual - part 18

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■

Conditions under which the BSM function may not function correctly

●

The BSM function may not detect vehicles correctly in the following situa-
tions:
• When the sensor is misaligned due to a strong impact to the sensor or its

surrounding area

• When mud, snow, ice, a sticker, etc., is covering the sensor or surround-

ing area on the rear bumper

• When driving on a road surface that is wet with standing water during bad

weather, such as heavy rain, snow, or fog

• When multiple vehicles are approaching with only a small gap between

each vehicle

• When the distance between your vehicle and a following vehicle is short
• When there is a significant difference in speed between your vehicle and

the vehicle that enters the detection area

• Vehicles which are being overtaken rapidly by your vehicle.
• When the difference in speed between your vehicle and another vehicle

is changing

• When  a  vehicle  enters  a  detection  area  traveling  at  about  the  same

speed as your vehicle

• As your vehicle starts from a stop, a vehicle remains in the detection area
• When driving up and down consecutive steep inclines, such as hills, dips

in the road, etc.

• When driving on roads with sharp bends, consecutive curves, or uneven

surfaces

• When vehicle lanes are wide, or when driving on the edge of a lane, and

the vehicle in an adjacent lane is far away from your vehicle

• When a bicycle carrier or other accessory is installed to the rear of the

vehicle

• When there is a significant difference in height between your vehicle and

the vehicle that enters the detection area

• Immediately after BSM system is set to on

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●

Instances  of  the  BSM  function  unnecessarily  detecting  a  vehicle  and/or
object may increase in the following situations:
• When the sensor is misaligned due to a strong impact to the sensor or its

surrounding area

• When the distance between your vehicle and a guardrail, wall, etc., that

enters the detection area is short

• When driving up and down consecutive steep inclines, such as hills, dips

in the road, etc.

• When vehicle lanes are narrow, or when driving on the edge of a lane,

and a vehicle traveling in a lane other than the adjacent lanes enters the
detection area

• When driving on roads with sharp bends, consecutive curves, or uneven

surfaces

• When the tires are slipping or spinning
• When the distance between your vehicle and a following vehicle is short
• When a bicycle carrier or other accessory is installed to the rear of the

vehicle

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The  RCTA  functions  when  your  vehicle  is  in  reverse.  It  can  detect
other vehicles approaching from the right or left rear of the vehicle. It
uses radar sensors to alert the driver of the other vehicle’s existence
through flashing the outside rear view mirror indicators and sounding
a buzzer.

RCTA function

Approaching vehicles

Detection areas

WARNING

■

Cautions regarding the use of the function
The driver is solely responsible for safe driving. Always drive safely, taking
care to observe your surroundings.
The RCTA function is only a supplementary function which alerts the driver
that a vehicle is approaching from the right or left at the rear of the vehicle.
As the RCTA function may not function correctly under certain conditions,
the driver’s own visual confirmation of safety is necessary. Over reliance on
this function may lead to an accident resulting death or serious injury.

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The areas that vehicles can be detected in are outlined below.

To give the driver a more consistent time to react, the buzzer can alert
for faster vehicles from farther away.
Example:

■

The RCTA function is operational when
The RCTA function operates when all of the following conditions are met:

●

The BSM system is set to on. (

P. 267)

●

The shift position is in R.

●

Vehicle speed is less than approximately 5 mph (8 km/h).

●

Approaching vehicle speed is between approximately 5 mph (8 km/h) and
18 mph (28 km/h).

RCTA function detection areas

Approaching vehicle

Speed

Approximate 
alert distance

Fast

18 mph (28 km/h)

65 ft. (20 m)

Slow

5 mph (8 km/h)

18 ft. (5.5 m)

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Conditions under which the RCTA function will not detect a vehicle
The RCTA function is not designed to detect the following types of vehicles
and/or objects:

●

Vehicles approaching from directly behind

●

Vehicles backing up in a parking space next to your vehicle

●

Guardrails, walls, signs, parked vehicles and similar stationary objects

*

●

Small motorcycles, bicycles, pedestrians, etc.

*

●

Vehicles moving away from your vehicle

●

Vehicles approaching from the parking spaces next to your vehicle

*

*

: Depending  on  the  conditions,  detection  of  a  vehicle  and/or  object  may

occur.

■

Conditions under which the RCTA function may not function correctly

●

The RCTA function may not detect vehicles correctly in the following situa-
tions:
• When the sensor is misaligned due to a strong impact to the sensor or its

surrounding area

• When mud, snow, ice, a sticker, etc., is covering the sensor or surround-

ing area on the rear bumper

• When driving on a road surface that is wet with standing water during bad

weather, such as heavy rain, snow, or fog

• When multiple vehicles are approaching with only a small gap between

each vehicle

• When a vehicle is approaching at high speed

●

Vehicles that the sensors cannot detect
due to obstructions

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• Immediately after the RCTA function is set to on
• Immediately after the engine is started with the RCTA function is set to on

• When  backing  up  on  a  slope  with  a

sharp change in grade

• When backing out of a shallow angle

parking spot

• When  the  sensors  cannot  detect  a

vehicle due to obstructions

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●

Instances  of  the  RCTA  function  unnecessarily  detecting  a  vehicle  and/or
object may increase in the following situations:
• When a vehicle passes by the side of your vehicle

• When  the  distance  between  your  vehicle  and  metal  objects,  such  as  a

guardrail, wall, sign, or parked vehicle, which may reflect electrical waves
toward the rear of the vehicle, is short

• When  the  parking  space  faces  a

street  and  vehicles  are  being  driven
on the street

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Driving assist systems

◆

ABS (Anti-lock Brake System)

Helps to prevent wheel lock when the brakes are applied suddenly,
or if the brakes are applied while driving on a slippery road surface

◆

Brake assist

Generates an increased level of braking force after the brake pedal
is depressed when the system detects a panic stop situation

◆

VSC (Vehicle Stability Control)

Helps  the  driver  to  control  skidding  when  swerving  suddenly  or
turning on slippery road surfaces

◆

Enhanced VSC (Enhanced Vehicle Stability Control)

Provides cooperative control of the ABS, TRAC, VSC and EPS.
Helps  to  maintain  directional  stability  when  swerving  on  slippery
road surfaces by controlling steering performance

◆

TRAC

 

(Traction Control)

Helps  to  maintain  drive  power  and  prevent  the  drive  wheels  from
spinning when starting the vehicle or accelerating on slippery roads

◆

ACA (Active Cornering Assist)

Helps to prevent the vehicle from drifting to the outer side by per-
forming  inner  wheel  brake  control  when  attempting  to  accelerate
while turning.

To keep driving safety and performance, the following systems
operate automatically in response to various driving situations.
Be aware, however, that these systems are supplementary and
should not be relied upon too heavily when operating the vehi-
cle. 

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◆

Hill-start assist control

Helps to reduce the backward movement of the vehicle when start-
ing on an uphill

◆

EPS (Electric Power Steering) 

Employs an electric motor to reduce the amount of effort needed to
turn the steering wheel.

The  slip  indicator  light  will  flash
while the TRAC/VSC systems are
operating.

If the vehicle gets stuck in mud, dirt or snow, the TRAC system may

reduce power from the engine to the wheels. Pressing 

 to turn

the system off may make it easier for you to rock the vehicle in order
to free it.
To  turn  the  TRAC  system  off,

quickly press and release 

.

A  message  will  be  shown  on  the
multi-information display.

Press 

  again  to  turn  the  sys-

tem back on.

When the TRAC/VSC systems are operating

Disabling the TRAC system

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■

Turning off both TRAC and VSC systems

To turn the TRAC and VSC systems off, press and hold 

 for more than 3

seconds while the vehicle is stopped.
The VSC off indicator light will come on and the message will be shown on
the multi-information display.

*

*

: On  vehicles  with  pre-collision  system,  pre-collision  brake  assist  and  pre-

collision braking will also be disabled. The PCS warning light will come on
and the message will be shown on the multi-information display. (

P. 237)

Press 

 again to turn the systems back on.

■

When the message is displayed on the multi-information display show-

ing that TRAC has been disabled even if 

 has not been pressed

TRAC cannot be operated. Contact your Toyota dealer.

■

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 when the brake pedal
is depressed repeatedly, when the engine 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.
• The brake pedal may pulsate slightly after the ABS is activated.
• The brake pedal may move down slightly after the ABS is activated.

■

Sounds and vibrations caused by the ACA system
Operation sounds and vibrations from the brake system may occur when the
ACA system is operating. However, none of these indicates a malfunction.

■

EPS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be
heard. This does not indicate a malfunction.

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Automatic reactivation of TRAC and VSC systems
After turning the TRAC and VSC systems off, the systems will be automati-
cally re-enabled in the following situations:

●

Vehicles without a smart key system: When the engine switch is turned to
the “LOCK” position
Vehicles with a smart key system: When the engine switch is turned off

●

If only the TRAC system is turned off, the TRAC will turn on when vehicle
speed increases
If both the TRAC and VSC systems are turned off, automatic re-enabling will
not occur when vehicle speed increases.

■

Operating conditions of ACA
The system operates when the following occurs:

●

TRAC/VSC can operate

●

The driver is attempting to accelerate while turning

●

The system detects that the vehicle is drifting to the outer side

●

The brake pedal is released

■

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 off. 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 shifted to P or N.

●

The accelerator pedal is depressed.

●

The parking brake is engaged.

●

2 seconds at maximum elapsed after the brake pedal is released.

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WARNING

■

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 nor-
mal 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/VSC may not operate effectively when
Directional control and power may not be achievable while driving on slip-
pery road surfaces, even if the TRAC/VSC system is operating. 
Drive the vehicle carefully in conditions where stability and power may be
lost.

■

ACA does not operate effectively when

●

Do not overly rely on ACA. ACA may not operate effectively when acceler-
ating down slopes or driving on slippery road surfaces.

●

When ACA  frequently  operates, ACA  may  temporarily  stop  operating  to
ensure proper operation of the brakes, TRAC and VSC.

■

Hill- start assist control does not operate effectively when

●

Do not overly rely on hill-start assist control. 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 control to hold the vehicle on an incline, as doing so may
lead to an accident.

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WARNING

■

When the TRAC/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  condi-
tions. As these are the systems to help 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 inflation pressure level.
The ABS, TRAC and VSC systems will not function correctly if different tires
are installed on the vehicle.
Contact  your Toyota  dealer  for  further  information  when  replacing  tires  or
wheels.

■

Handling of tires and the suspension
Using tires with any kind of problem or modifying the suspension will affect
the driving assist systems, and may cause a system to malfunction.

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Winter driving tips

● Use  fluids  that  are appropriate  to  the  prevailing outside  tempera-

tures. 

• Engine oil
• Engine coolant
• Washer fluid

● Have a service technician inspect the condition of the battery.
● Have the vehicle fitted with four snow tires or purchase a set of tire

chains for the front tires

*

.

Ensure that all tires are the same size and brand, and that chains match
the size of the tires.

*

: Tire chains cannot be mounted on 18-inch tires.

Perform the following according to the driving conditions: 
● Do not try to forcibly open a window or move a wiper that is frozen.

Pour warm water over the frozen area to melt the ice. Wipe away
the water immediately to prevent it from freezing. 

● To  ensure  proper  operation  of  the  climate  control  system  fan,

remove  any  snow  that  has  accumulated  on  the  air  inlet  vents  in
front of the windshield. 

● Check for and remove any excess ice or snow that may have accu-

mulated  on  the  exterior  lights,  vehicle’s  roof,  chassis,  around  the
tires or on the brakes.

● Remove any snow or mud from the bottom of your shoes before

getting in the vehicle.

Carry  out  the  necessary  preparations  and  inspections  before
driving the vehicle in winter. Always drive the vehicle in a man-
ner appropriate to the prevailing weather conditions. 

Preparation for winter

Before driving the vehicle

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Accelerate the vehicle slowly, keep a safe distance between you and
the vehicle ahead, and drive at a reduced speed suitable to road con-
ditions. 

● 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 the vehicle is parked without setting the parking
brake, make sure to block the wheels.
Failure to do so may be dangerous because it may cause the vehi-
cle to move unexpectedly, possibly leading to an accident.

● If the vehicle is parked without setting the parking brake, confirm

that the shift lever cannot be moved out of P

*.

*

: The shift lever will be locked if it is attempted to be shifted from P to any

other position without depressing the brake pedal. If the shift lever can be
shifted from P, there may be a problem with the shift lock system. Have the
vehicle inspected by your Toyota dealer immediately.



17-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
0.39 in. (10 mm) in width
1.18 in. (30 mm) in length

Cross chain:

0.16 in. (4 mm) in diameter
0.55 in. (14 mm) in width
0.98 in. (25 mm) in length



18-inch tires

Tire  chains  cannot  be  mounted  as  the  space  between  the  tire  and
body is too narrow.

Snow tires should be used instead.

When driving the vehicle

When parking the vehicle

Selecting tire chains

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Regulations regarding the use of tire chains vary depending on loca-
tion and type of road. Always check local regulations before installing
chains.

■

Tire chain installation
Observe the following precautions when installing and removing chains:

●

Install and remove tire chains in a safe location.

●

Install tire chains on the front tires. Do not install tire chains on the rear tires.

●

Install tire chains on front tires as tightly as possible. Retighten chains after
driving 1/4 

 1/2 mile (0.5  1.0 km).

●

Install tire chains following the instructions provided with the tire chains.

Regulations on the use of tire chains