2018 SUBARU BRZ sensor

116 1-7. Safety information
BRZ_U (A4450BE-A)
■Operation
The SRS side airbag and SRS curtain airbag can function only when the
ignition switch is in the “ON” position.
The driver’s and front passenger’s SRS side airbags and SRS curtain air-
bags deploy independently of each other since each has its own impact sen-
sor. Therefore, they may not both deploy in the same accident. Also, the
SRS side airbag and SRS curtain airbag deploys independently of the
driver’s and front passenger’s SRS front airbags in the steering wheel and
instrument panel.
A rollover sensor is also located inside the airbag control module.
An impact sensor, which senses impact force, is located in each of the left
and right center pillars, doors and rear wheel houses. Another impact sen-
sor, which also senses impact force, is located under the center of the rear
seats.
If the impact sensor that is located under the center of the rear seats and
one of the center pillar impact sensors or door impact sensors together
sense an impact force above a predetermined level in a side collision, the
control module causes both the SRS side airbag and curtain airbag on the
impacted side to inflate regardless of whether the rear wheel house impact
sensor on the same side senses an impact.
If the impact sensor that is located under the center of the rear seats and
one of the rear wheel house impact sensors together sense an impact force
above a predetermined level, the control module causes only the SRS cur-
tain airbag on the impacted side to inflate.
If the rollover sensor detects rollover of the vehicle, the control module
inflates the SRS curtain airbags. At this time, the driver’s and front passen-
ger’s seatbelt pretensioners also operate at the same time.

129
1-7. Safety information
1
Before driving
BRZ_U (A4450BE-A)
SRS airbag system monitors
A diagnostic system continually
monitors the readiness of the
SRS airbag system (including
front seatbelt pretensioners)
while the vehicle is being driven.
The SRS airbag system warning
light will show normal system
operation by illuminating for
approximately 6 seconds when
the ignition switch is turned to
the “ON” position.
The following components are monitored by the indicator:
● Front sub sensor (right-hand side)
● Front sub sensor (left-hand side)
● Airbag control module (including impact sensors and rollover sen-
sors)
● Frontal airbag module (driver’s side)
● Frontal airbag module (front passenger’s side)
● Side airbag sensor (center pillar right-hand side)
● Side airbag sensor (center pillar left-hand side)
● Door impact sensor (right-hand side)
● Door impact sensor (left-hand side)
Vehicles with a monochrome multi-
information display
Vehicles with a color multi-information
display

130 1-7. Safety information
BRZ_U (A4450BE-A)●
Side airbag module (driver’s side)
● Side airbag module (front passenger’s side)
● Curtain airbag sensor (rear wheel house right-hand side)
● Curtain airbag sensor (rear wheel house left-hand side)
● Curtain airbag module (right-hand side)
● Curtain airbag module (left-hand side)
● Satellite safing sensor (under the center of the rear seats)
● Seatbelt pretensioner (driver’s side)
● Seatbelt pretensioner (front passenger’s side)
● Seatbelt buckle switch (front passenger’s side)
● Front passenger’s occupant detection system sensor
● Front passenger’s occupant detection control module
● Front passenger’s frontal airbag ON and OFF indicator
● All related wiring
WARNING
■SRS warning light
If the warning light exhibits any of the following conditions, there may be a
malfunction in the seatbelt pretensioners, SRS airbag system and/or front
passenger occupant detection system. Immediately take your vehicle to your
nearest SUBARU dealer to have the system checked. Unless checked and
properly repaired, the seatbelt pret ensioners, SRS airbag system and/or
front passenger occupant detection system will not operate properly in the
event of a collision, which may increase the risk of injury.
● Flashing or flickering of the warning light
● No illumination of the warning light when the ignition switch is first turned
to the “ON” position.
● Continuous illumination of the warning light
● Illumination of the warning light while driving

131
1
1-7. Safety information
Before driving
BRZ_U (A4450BE-A)
Front passenger occupant detection system
Your vehicle is equipped with a front passenger occupant detection
system. Using the sensors installed under the seat cover, the system
detects the conditions of the front passenger seat and activates or
deactivates the frontal airbag for front passenger seat. The occupant
detection system may not inflate the front passenger’s SRS frontal
airbag even when the driver’s SRS frontal airbag deploys. This is not
a malfunction. If the seatbelt buckle switch and/or front passenger’s
occupant detection system have fa iled, the SRS airbag system warn-
ing light will illuminate. Have the system inspected by your SUBARU
dealer immediately if the SRS ai rbag system warning light illumi-
nates.
If your vehicle has sustained impact , this may affect the proper func-
tion of the SUBARU advanced front al airbag system. Immediately
contact your SUBARU dealer a nd have your vehicle inspected. Do
not use the front passenger seat while driving to your SUBARU
dealer.
SRS airbag system warning light
Front passenger’s seatbelt reminder light
“AIR BAG OFF” indicator light
“AIR BAG ON” indicator light

235
2-3. Operating the lights and windshield wipers
2
When driving
BRZ_U (A4450BE-A)
■
Daytime running light system
● The daytime running lights illuminate using the same lights as the parking
lights and illuminate brighter than the parking lights.
● To make your vehicle more visible to other drivers during daytime driving,
the daytime running lights turn on automatically when all of the following
conditions are met. (The daytime running lights are not designed for use
at night.)
• The engine is running
• The select lever is shifted out of P (Vehicles with an automatic trans-
mission)
• The parking brake is released
• The headlight switch is off or in the “AUTO”
* position
*: When the surroundings are bright
The daytime running lights remain on after they illuminate even if the parking
brake is set again.
● When the turn signal indicators are flashing, the daytime running light on
the side that the turn signals are flashing will turn off.
● When the hazard warning flashers ar e flashing, both daytime running
lights will turn off.
● Compared to turning on the headlights, the daytime running light system
offers greater durability and consumes less electricity, so it can help
improve fuel economy.
■ Headlight control sensor
Headlight control sensor is located on the
passenger's side.
The sensor may not function properly if
an object is placed on the sensor, or any-
thing that blocks the sensor is affixed to
the windshield.
Doing so interferes with the sensor
detecting the level of ambient light and
may cause the automatic headlight sys-
tem to malfunction.

236 2-3. Operating the lights and windshield wipers
BRZ_U (A4450BE-A)
■Welcome lighting system
When entering the vehicle
When the headlight switch is in and the doors are unlocked using the
remote keyless entry system, the headlights, front position lights, etc. will
illuminate for approximately 30 seconds.
The lights are turned off in the following situations.
●The engine switch is turned to the “ON” position. (Vehicles without a key-
less access with push button start system)
● The push-button ignition switch is turned to “ON” mode. (Vehicles with a
keyless access with push button start system)
● The doors are locked.
When exiting the vehicle
Vehicles without a keyless access with push button start system:
The light switch is in , the headlights and tail lights turn off 30 seconds
after a door is opened and closed if the key is removed from the engine
switch. (The lights turn off immediately if on the key is pressed after
all the doors are locked.)
To turn the lights on again, turn the engine switch to the “ON” position, or
turn the lights off and then back to or
.
Vehicles with a keyless access with push button start system:
The light switch is in , the headlights and tail lights turn off 30 seconds
after a door is opened and closed if the push-button ignition switch is turned
off. (The lights turn off immediately if on the key is pressed or the
door lock sensor on the door handle is touched after all the doors are
locked.)
To turn the lights on again, turn the push-button ignition switch to “ON”
mode, or turn the light switch off and then back to or
.
■ Light reminder buzzer
Vehicles without a keyless access with push button start system
A buzzer sounds when the engine switch is turned to “LOCK” position and
the driver's door is opened with the key removed from the engine switch
while the lights are turned on.
Vehicles with a keyless access with push button start system
A buzzer sounds when the push-button ignition switch is turned off and the
driver's door is opened while the lights are turned on.

237
2-3. Operating the lights and windshield wipers
2
When driving
BRZ_U (A4450BE-A)
■
Automatic headlight leveling system
The level of the headlights is automatically adjusted according to the number
of passengers and the loading condition of the vehicle to ensure that the
headlights do not interfere with other road users.
■ Windshield wiper-linked automatic headlights
When the headlight switch is in , if the windshield wipers operate for
approximately 10 seconds, the headlights will turn on automatically. (If the
windshield wipers are operated due to oper ation of the windshield washers,
the headlights will not turn on automatic ally.) In this case, the headlights will
automatically turn off approximately 60 seconds after the windshield wipers
stop operating.
■ Battery-saving function
In the following conditions, the headlights and the other remaining lights will
go off automatically after 20 minutes in order to prevent the vehicle battery
from being discharged:
● The headlights and/or tail lights are on.
● The key is removed from the engine switch (vehicles without a keyless
access with push button start system) or the push-button ignition switch
is turned off (vehicles with a keyless access with push button start sys-
tem).
● The light switch is in , or .
This function will be canceled in any of the following situations:
● When the engine switch is turned to the “ON” position (vehicles without a
keyless access with push button start system) or the push-button ignition
switch is turned to “ON” mode (vehicles with a keyless access with push
button start system)
● When the light switch is operated
● When the door is opened or closed
■ Customization that can be configured at your SUBARU dealer
Settings (e.g. light sensor sensitivity) can be changed.
(Customizable features →P. 522)

5
When trouble arises
435
5-2. Steps to take in an emergency
BRZ_U (A4450BE-A)
■
Low fuel level warning light
When the vehicle is on an incline, curve and so forth, the fuel inside the tank
moves, which may cause the warning light to come on early.
■ Front passenger detection sensor and passenger seatbelt reminder
and warning buzzer
● If luggage is placed on the front passenger seat, the front passenger
detection sensor may cause the warning light to flash and warning
buzzer to sound, even if a passenger is not sitting in the seat.
● If a cushion is placed on the seat, the sensor may not detect a passen-
ger, and the warning light may not operate properly.
■
When the tire pressure warning light comes on (if equipped)
Check the tire inflation pressure and adjust to the appropriate level.
■The tire pressure warning light may turn on due to natural causes
(if equipped)
The tire pressure warning light may turn on due to natural causes such
as natural air leaks or tire inflation pressure changes caused by temper-
ature. In this case, adjusting the tire inflation pressure will turn off the
warning light (after a few minutes).
■When a tire is replaced with a spare tire (vehicles with a tire pres-
sure monitoring system)
The compact spare tire is not equipped with a tire pressure warning
valve and transmitter. If a tire goes flat, the tire pressure warning light will
not turn off even though the flat tire has been replaced with the spare
tire. Replace the spare tire with the repaired tire and adjust the tire infla-
tion pressure. The tire pressure warning light will go off after a few min-
utes.