sensor TOYOTA C-HR 2017 Workshop Manual

3554-5. Using the driving support systems
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This mode employs a radar sensor to detect the presence of vehicles
up to approximately 100 m (328 ft.) ahead, determines the current
vehicle-to-vehicle following distance, and operates to maintain a suit-
able following distance from the vehicle ahead.
Note that vehicle-to-vehicle distance will close in when traveling on long
downhill slopes.
Driving in vehicle-to-vehicle distance control mode

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When constant speed control mode is selected, your vehicle will main-
tain a set speed without controlling the vehicle-to-vehicle distance.
Select this mode only when vehicle-to-vehicle distance control mode
does not function correctly due to a dirty radar sensor.
Monochrome display
With the cruise control off,
press and hold the “ON-OFF”
button for 1.5 seconds or more.
Immediately after the “ON-OFF”
button is pressed, the radar cruise
control indicator will come on.
Afterwards, it switches to the cruise
control indicator.
Switching to constant speed con-
trol mode is only possible when
operating the lever with the cruise
control off.
Accelerate or decelerate, with
accelerator pedal operation, to
the desired vehicle speed
(above approximately 50 km/h
[30 mph]) and push the lever
down to set the speed.
Cruise control “SET” indicator will
come on.
The vehicle speed at the moment
the lever is released becomes the
set speed.
Adjusting the speed setting: P. 359
Canceling and resuming the speed setting: P. 361
Selecting constant speed control mode
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■Dynamic radar cruise control can be set when
● The shift lever is in D.
● Vehicle speed is above approximately 50 km/h (30 mph).
■ Accelerating after setting the vehicle speed
The vehicle can accelerate by operating the accelerator pedal. After acceler-
ating, the set speed resumes. However, during vehicle-to-vehicle distance
control mode, the vehicle speed may decrease below the set speed in order
to maintain the distance to the preceding vehicle.
■ Automatic cancelation of vehicle-to-vehicle distance control mode
Vehicle-to-vehicle distance control mode is automatically canceled in the fol-
lowing situations.
● Actual vehicle speed falls below approximately 40 km/h (25 mph).
● VSC is activated.
● TRC is activated for a period of time.
● When the VSC or TRC system is turned off by pressing the VSC off switch.
● The sensor cannot detect correctly because it is covered in some way.
● Pre-collision braking is activated.
If vehicle-to-vehicle distance control mode is automatically canceled for any
other reason, there may be a malfunction in the system. Contact any autho-
rized Toyota retailer or Toyota authorized repairer, or any reliable repairer.

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■ When the sensor may not be correctly detecting the vehicle ahead
In the case of the following and depending on the conditions, operate the
brake pedal when deceleration of the system is insufficient or operate the
accelerator pedal when acceleration is required.
As the sensor may not be able to correctly detect these types of vehicles, the
approach warning ( P. 362) may not be activated.
● Vehicles that cut in suddenly
● Vehicles traveling at low speeds
● Vehicles that are not moving in the same lane
● Vehicles with small rear ends (trailers with no load on board, etc.)
● Motorcycles traveling in the same lane
● When water or snow thrown up by the surrounding vehicles hinders the
detecting of the sensor
● When your vehicle is pointing upwards
(caused by a heavy load in the luggage
compartment, etc.)
● Preceding vehicle has an extremely high
ground clearance

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■ Conditions under which the vehicle-to-vehicle distance control mode
may not function correctly
In the case of the following conditions, operate the brake pedal (or accelera-
tor pedal, depending on the situation) as necessary.
As the sensor may not be able to correctly detect vehicles ahead, the system
may not operate properly.
● When the vehicle ahead of you decelerates suddenly
● When the road curves or when the lanes
are narrow
● When steering wheel operation or your
position in the lane is unstable

3924-5. Using the driving support systems
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BSM (Blind Spot Monitor)
The Blind Spot Monitor is a system that has 2 functions;
● The BSM (Blind Spot Monitor) function
Assists the driver in making the decision when changing lanes
● The RCTA (Rear Crossing Traffic Alert) function
Assists the driver when backing up
These functions use same sensors.
Outside rear view mirror indicators
BSM function:
When a vehicle is detected in a blind spot of the outside rear view mirrors
or approaching rapidly from behind into a blind spot, the outside rear view
mirror indicator on the detected side will illuminate. If the turn signal lever
is operated toward the detected side, the outside rear view mirror indicator
will flash.
RCTA function:
When a vehicle approaching from the right or left at the rear of the vehicle
is detected, both outside rear view mirror indicators will flash.
: If equipped
Summary of the Blind Spot Monitor
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■The outside rear view mirror indicators visibility
When under strong sunlight, the outside rear view mirror indicator may be dif-
ficult to see.
■ Hearing the RCTA buzzer
The RCTA buzzer may be difficult to hear over loud noises, such as if the
audio system volume is high.
■ When “Blind Spot Monitor Unavailable.” is shown on the multi-informa-
tion display
Water, snow mud, etc., may be built up in the vicinity of the sensor area of
bumper ( P. 397).
Removing the water, snow, mud, etc., from the vicinity of the sensor area
bumper should return it to normal.
Also, the sensor may not function normally when used in extremely hot or
cold weather.
■ When “Blind Spot Monitor System Malfunction Visit Your Dealer.” is
shown on the multi-information display
There may be a sensor malfunction or misaligned. Have the vehicle
inspected by any authorized Toyota retailer or Toyota authorized repairer, or
any reliable repairer.

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WARNING
■Handling the radar sensor
One Blind Spot Monitor sensor is installed inside the left and right side of
the vehicle rear bumper respectively. Observe the following to ensure the
Blind Spot Monitor can function correctly.
If the warning message does not disappear, have the vehicle inspected
by any authorized Toyota retailer or Toyota authorized repairer, or any reli-
able repairer.
● Do not subject a sensor or its surrounding area on the rear bumper to a
strong impact.
If a sensor is moved even slightly off position, the system may malfunction
and vehicles may not be detected correctly.
In the following situations, have your vehicle inspected by any authorized
Toyota retailer or Toyota authorized repairer, or any reliable repairer.
• A sensor or its surrounding area is subject to a strong impact.
• If the surrounding area of a sensor is scratched or dented, or part of
them has become disconnected.
● Do not disassemble the sensor.
● Do not attach accessories or stickers to the sensor or surrounding area on
the bumper.
● Do not modify the sensor or surrounding area on the bumper.
● Do not paint the rear bumper any color other than an official Toyota color.
●Keep the sensor and its surrounding
area on the bumper clean at all times. If
a sensor or its surrounding area on the
rear bumper is dirty or covered with
snow, the Blind Spot Monitor may not
operate and a warning message
( P. 394) will be displayed.
In this situation, clear off the dirt or
snow and drive the vehicle with the
operation conditions of the BSM func-
tion ( P. 400) satisfied for approxi-
mately 10 minutes.

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The BSM function uses radar sensors to detect the following vehicles
traveling in adjacent lanes and advises the driver of the presence of
such vehicles via the indicators on the outside rear view mirrors.
Vehicles that are traveling in areas that are not visible using the out-
side rear view mirrors (the blind spots)
Vehicles that are approaching rapidly from behind in areas that are
not visible using the outside rear view mirrors (the blind spots)
BSM function
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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
• 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 accessor y 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