brake sensor TOYOTA PRIUS C 2018 Owners Manual (in English)

2244-5. Toyota Safety Sense C
PRIUS c_U (OM52G95U)
The pre-collision system is equipped with a sophisticated computer
that will record cert ain data, such as:
• Accelerator status
• Brake status
• Vehicle speed
• Operation status of the pre-collision system functions
• Information (such as the distanc e and relative speed between your
vehicle and the vehicle ahead or other objects)
• Images from the front sensor (ava ilable only when the pre-collision
braking function is operating)
The pre-collision system does not record conversations, sounds or
images of the inside of the vehicle.
● Data usage
Toyota may use the data recorded in this computer to diagnose
malfunctions, conduct research and development, and improve
quality.
Toyota will not disclose the recor ded data to a third party except:
• With the consent of the vehicle owner or with the consent of the lessee if the vehicle is leased
• In response to an official request by the police, a court of law or a
government agency
• For use by Toyota in a lawsuit
• For research purposes where the data is not tied to a specific vehicle or vehicle owner
● Recorded images can be erased using a specialized device.
The image recording function can be disabled. However, if the func-
tion is disabled, data from when the pre-collision system operates
will not be available.
Vehicle data recording

2294-5. Toyota Safety Sense C
4
Driving
PRIUS c_U (OM52G95U)
◆Pre-collision warning
When the system determines
that the possibility of a frontal
collision is high, a buzzer will
sound and a warning message
will be displayed on the multi-
information display to urge the
driver to take evasive action.
◆Pre-collision brake assist
When the system determines that the possibility of a frontal colli-
sion with a vehicle is high, the system applies greater braking force
in relation to how strongly the brake pedal is depressed.
◆Pre-collision braking
When the system determines that the possibility of a frontal colli-
sion with a vehicle is high, the sy stem warns the driver. If the sys-
tem determines that the possibility of a collision is extremely high,
the brakes are automatically appli ed to help avoid the collision or
reduce the collision speed.
PCS (Pre-Collision System)
The pre-collision system uses the front sensor to detect vehi-
cles in front of your vehicle. When the system determines that
the possibility of a frontal collisi on with a vehicle is high, a warn-
ing operates to urge the driver to take evasive action and the
potential brake pressure is increased to help the driver avoid the
collision. If the system determin es that the possibility of a fron-
tal collision with a vehicle is extremely high, the brakes are auto-
matically applied to help avoid the collision or help reduce the
impact of the collision.
The pre-collision system can be disabled/enabled and the warning
timing can be changed. ( →P. 232)

2404-5. Toyota Safety Sense C
PRIUS c_U (OM52G95U)• If the wheels are misaligned
• If a wiper blade is blocking the front sensor
• The vehicle is wobbling.
• The vehicle is being driven at extremely high speeds.
• When driving on roads with sharp bends or uneven surfaces
• When a preceding vehicle is a poor reflector of laser
● In some situations such as the following, sufficient braking force may not be
obtained, preventing the system from performing properly:
• If the braking functions cannot operate to their full extent, such as when
the brake parts are extremely cold, extremely hot, or wet
• If the vehicle is not properly maintained (brakes or tires are excessively worn, improper tire inflation pressure, etc.)
• When the vehicle is being driven on a gravel road or other slippery sur- face
• If your vehicle is skidding
• When the front part of the vehicle is
raised or lowered
• When the sensor is misaligned due to a strong impact being applied to the
sensor, etc.

2414-5. Toyota Safety Sense C
4
Driving
PRIUS c_U (OM52G95U)■
If the PCS warning light flashes or illuminates and a warning message is
displayed on the mult i-information display
The pre-collision system may be tem porarily unavailable or there may be a
malfunction in the system.
● In the following situations, the warning light will turn off, the message will
disappear and the system will become operational when normal operating
conditions return:
• When the area around the front sensor is hot, such as in the sun
• When the windshield is fogged up or covered with condensation or ice
(→ P. 380)
• When the front sensor or the area around either sensor is cold, such as in an extremely cold environment
• If the area in front of the front sensor is obstructed, such as when the hood is open
● If the PCS warning light continues to flash or illuminate or the warning mes-
sage does not disappear, the system may be malfunctioning. Have the vehi-
cle inspected by your Toyota dealer immediately.
■ If VSC is disabled
●If TRAC and VSC are disabled ( →P. 268), the pre-collision brake assist and
pre-collision braking functions are also disabled. However, the pre-collision
warning function will still operate.
● The PCS warning light illuminates and “VSC TURNED OFF PRE-COLLI-
SION BRAKE SYSTEM UNAVAILABLE” is displayed on the multi-informa-
tion display.

4848-2. Steps to take in an emergency
PRIUS c_U (OM52G95U)
*1: Brake system warning buzzer: When there is a possible problem that could affect braking performance,
the warning light will come on and a warning buzzer will sound.
*2: Parking brake engaged warning buzzer →P. 205, 494
PCS warning light When the warning light flashes (and a buzzer sounds):
Indicates a malfunction in the PCS (Pre-Collision system)
→ Have the vehicle inspected by your Toyota dealer
immediately.
When the warning light illuminates:
Indicates that the PCS (Pre-Collision system) is temporar-
ily unavailable, possibly due to either of the following:
• The part of the windshield around the front sensor being
dirty, fogged up or covered with condensation, ice, stick-
ers, etc.
→ Clear the dirt, fog, conden sation, ice, stickers, etc.
( →P. 227)
• Front sensor temperature being outside of its opera- tional range
→ Wait for a while until the area around the front sensor
has cooled down sufficiently.
• Either the VSC system or PCS (Pre-Collision system) is
disabled or both are disabled.
→ To enable the PCS, enable both the VSC system and
PCS. ( →P. 232, 268)
Tire pressure warning light
When the light comes on:
Low tire inflation pressure such as
• Natural causes ( →P. 486)
• Flat tire ( →P. 507)
→ Adjust the tire inflation pressure to the specified
level.
The light will turn off af ter a few minutes. In case
the light does not turn off even if the tire inflation
pressure is adjusted, have the system checked by
your Toyota dealer.
When the light comes on after blinking for 1 minute:
Malfunction in the tire pressure warning system
( → P. 487)
→ Have the system checked by your Toyota dealer.
Warning lightWarning light/Details/Actions

4998-2. Steps to take in an emergency
8
When trouble arises
PRIUS c_U (OM52G95U)
Indicates that the accelerator and brake pedals
are being depressed simultaneously, and the
Brake Override System is operating. (→P. 171)
→ Release the accelerator pedal and depress
the brake pedal.
Indicates that, as the shift lever was shifted while
the accelerator pedal was depressed, Drive-Start
Control was activated. ( →P. 171)
A buzzer also sounds.
→ Release the accelerator pedal immediately.
Indicates that the accelerator pedal is depressed
with the shift lever in P
→ Release the accelerator pedal.
The system is temporarily canceled because the
operating conditions of the front sensor (tempera-
ture, etc.) are not met.
The following systems may be suspended:
• PCS (Pre-Collision system)
• LDA (Lane Departure Alert)
• Automatic High Beam
→The system can be operated when the
operating conditions of the front sensor
(temperature, etc.) are met. Turn the system
off, wait for a while, and then turn the sys-
tem back on.
The area of the windshield in front of the front
sensor is fogged up or covered with dirt, rain, ice,
snow, etc.
The following systems may be suspended:
• PCS (Pre-Collision system)
• LDA (Lane Departure Alert)
• Automatic High Beam
→ Turn the system off, clear the windshield of
dirt, fog, ice, etc. then turn the system back
on. (→P. 227)
Warning messageDetails/Actions
(Flashes)
(Flashes)

593Alphabetical index
PRIUS c_U (OM52G95U)
Floor mat .................................... 26
FluidBrake .................................... 544
Washer ................................. 432
Fog lights
Replacing light bulbs............. 466
Switch ................................... 210
Front fog lights
Replacing light bulbs............. 466
Switch ................................... 210
Front passenger occupant
classification system .............. 52
Front passenger’s seat belt reminder light ................. 483
Front seats Adjustment ............................ 148
Front sensor............................. 225
Automatic High Beam ........... 225
LDA (Lane Departure Alert)........ 225
PCS (Pre-Collision System)........ 225
Precautions ........................... 226
Front side marker lights Replacing light bulbs............. 467
Switch ................................... 206
Wattage ................................ 546
Front turn signal lights Replacing light bulbs............. 462
Switch ................................... 204
Wattage ................................ 546
Fuel Capacity ................................ 540
Fuel gauge .............................. 97
Information ............................ 547
Refueling............................... 219
Type ...................................... 540
Fuel door .................................. 219
Fuel filler door.......................... 219
Fuses ........................................ 456 Gauges ....................................... 97
Glove box ................................. 391
Hazard lights
Switch ................................... 470
Head restraints Adjusting .............................. 153
Headlights Replacing light bulbs ............ 466
Switch ................................... 206
Heaters Seat heaters ......................... 386
Side mirrors .......................... 380
Hill-start assist control ........... 266
Hood ......................................... 421
Horn .......................................... 156
Hybrid system Emergency shut off system .... 80
Energy monitor/consumption screen ........... 110
High voltage components ....... 79
Hybrid system indicator ........ 108
Power switch ........................ 190
Vehicle Proximity Notification System .............. 75
FG
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