2018 SUBARU BRZ key battery

177
2-1. Driving procedures
2
When driving
BRZ_U (A4450BE-A)
When stopping the engine with the select lever in a position
other than P (vehicles with an automatic transmission)
If the engine is stopped with the select lever in a position other than P,
the push-button ignition switch will not be turned off but instead be
turned to “ACC” mode. Perform the following procedure to turn the
switch off: Check that the parking brake is set.
Shift the select lever to P.
Check that the keyless access with push button start system
indicator light (green) flashes slowly and then press the push-
button ignition switch once.
Check that the keyless access with push button start system
indicator light (green) is off.
■Auto power off function
Vehicles with an automatic transmission
If the vehicle is left in “ACC” mode for more than 20 minutes or “ON” mode
(the engine is not running) for more than an hour with the select lever in P,
the push-button ignition switch will automatically turn off. However, this func-
tion cannot entirely prevent battery discharge. Do not leave the vehicle with
the push-button ignition switch in “ACC” or “ON” mode for long periods of
time when the engine is not running.
Vehicles with a manual transmission
If the vehicle is left in “ACC” mode for more than 20 minutes or “ON” mode
(the engine is not running) for more than an hour, the push-button ignition
switch will automatically turn off. However, this function cannot entirely pre-
vent battery discharge. Do not leave t he vehicle with the push-button ignition
switch in “ACC” or “ON” mode for long periods of time when the engine is not
running.
STEP 1
STEP 2
STEP 3
STEP 4

178 2-1. Driving procedures
BRZ_U (A4450BE-A)
■Operation of the push-button ignition switch
If the switch is not pressed shortly and firmly, the push-button ignition switch
mode may not change or the engine may not start.
■ Access key battery depletion
→ P. 3 5
■ Conditions affecting operation
→ P. 3 1
■ Note for the “keyless access” entry function
→ P. 3 2
■ If the engine does not start
The engine immobilizer system may not have been deactivated. ( →P. 82)
Contact your SUBARU dealer.
■ Steering lock
After turning the push-button ignition switch off and opening and closing the
doors, the steering wheel will be locked due to the steering lock function.
Operating the push-button ignition switch again automatically cancels the
steering lock. Vehicles with an automatic transmission:
Check that the select lever is securely set
in P. The engine may not start if the select
lever is displaced out of P. The keyless
access with push button start system indi-
cator light (green) will flash quickly.

179
2-1. Driving procedures
2
When driving
BRZ_U (A4450BE-A)
■
When the steering lock cannot be released
■ Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, the motor may be sus-
pended if the engine is turned on and off r epeatedly in a short period of time.
In this case, refrain from operating the engine. After about 10 seconds, the
steering lock motor will resume functioning.
■ If the keyless access with push button start indicator flashes in yellow
and a message is displayed on the multi-information display
The system may be malfunctioning. Have the vehicle inspected by your
SUBARU dealer immediately.
■ If the access key battery is depleted
→ P. 392
■ If the keyless access with push button start system has been deacti-
vated in a customized setting
→ P. 477 The keyless access with push button start
system indicator light (green) will flash
quickly and a message will be shown on
the multi-information display. (
→P. 446)
Vehicles with an automatic transmis-
sion
Check that the select lever is set in P.
Press the push-button ignition switch
while turning the steering wheel left and
right.
Vehicles with a manual transmission
Press the push-button ignition switch
while turning the steering wheel left and
right.

180 2-1. Driving procedures
BRZ_U (A4450BE-A)
■Immediately after reconnecting the battery terminals due to replacing
the battery and so forth
The engine may not start. If this occurs, turn the push-button ignition switch
to “ON” mode, and start the engine after waiting at least 10 seconds. Idling
may be unstable immediately after the engine starts, however, this is not a
malfunction.
WARNING
■ When starting the engine
●Always start the engine while sitting in the driver’s seat. Do not depress
the accelerator pedal while starting the engine under any circumstances.
Doing so may cause an accident resulting in death or serious injury.
● If the keyless access with push button start system indicator light flashes
in green after the engine has started, nev er drive the vehicle. The steering
wheel is still locked, and it may result in an accident.
■ Caution while driving
If engine failure occurs while the vehicle is moving, do not lock or open the
doors until the vehicle reaches a safe and complete stop. Activation of the
steering lock in this circumstance may lead to an accident, resulting in death
or serious injury.
■ Stopping the engine
Do not touch the push-button ignition switch during driving.
When the push-button ignition switch is pressed for 2 seconds or longer or
pressed 3 times successively, the engine will stop. When the engine stops,
the brake booster will not function. A greater foot pressure will be required
on the brake pedal.
The power steering system will not operate either. A greater force will be
required to steer, and it may result in an accident.

181
2-1. Driving procedures
2
When driving
BRZ_U (A4450BE-A)
CAUTION
■
To prevent battery discharge
● Do not leave the push-button ignition switch in “ACC” or “ON” mode for
long periods of time without the engine running.
● If the keyless access with push button start system indicator light (green)
is illuminated, the push-button ignition switch is not off. When exiting the
vehicle, always check that the push-button ignition switch is off.
● Vehicles with an automatic transmission: Do not stop the engine when the
select lever is in a position other than P. If the engine is stopped in another
select lever position, the push-button ignition switch will not be turned off
but instead be turned to “ACC” mode. If the vehicle is left in “ACC” mode,
battery discharge may occur.
■ When starting the engine
● Do not race a cold engine.
● If the engine becomes difficult to start or stalls frequently, have your vehi-
cle checked by your SUBARU dealer immediately.
● Vehicles with an automatic transmission: Do not shift the select lever while
the starter is operating.
■ Symptoms indicating a malfunction with the push-button ignition
switch
If the push-button ignition switch seems to be operating somewhat differently
than usual, such as the switch sticking slightly, there may be a malfunction.
Contact your SUBARU dealer immediately.

183
2-1. Driving procedures
2
When driving
BRZ_U (A4450BE-A)
■
Turning the key from “ACC” to “LOCK”
Vehicles with an automatic transmission: Shift the select lever to P.
(→ P. 185)
Vehicles with a manual transmission: Shift the shift lever to neutral.
( → P. 192)
■ If the engine does not start
Remove the key and try again. If the engine does not start, the engine immo-
bilizer system may not have been deactivated. ( →P. 82)
Contact your SUBARU dealer.
■ When the steering lock cannot be released
■ Key reminder function
A buzzer sounds if the driver’s door is opened while the engine switch is in
the “LOCK” or “ACC” position to remind you to remove the key.
■ Immediately after reconnecting the battery terminals due to replacing
the battery and so forth
The engine may not start. If this occurs, turn the engine switch to the “ON”
position, and start the engine after waiting at least 10 seconds. Idling may be
unstable immediately after the engine starts, however, this is not a malfunc-
tion.
STEP 1
Push in the key and turn to the “LOCK”
position.STEP 2
When starting the engine, the engine
switch may seem stuck in the “LOCK”
position. To free it, turn the key while turn-
ing the steering wheel slightly left and
right.

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)

303
3-1. Using the air conditioning system and defogger
3
Interior features
BRZ_U (A4450BE-A)
■
The defoggers can be operated when
Vehicles without a keyless access with push button start system
The engine switch is in the “ON” position.
Vehicles with a keyless access with push button start system
The push-button ignition switch is in “ON” mode.
■ The outside rear view mirror defoggers (vehicles with outside rear view
mirror defoggers)
Turning the rear window defogger on will turn the outside rear view mirror
defoggers on.
■ When continuous operation is set (vehicles with an automatic air con-
ditioning system)
During continuous operation, the defogger stops operating for 2 minutes
after every 15 minutes of continual operation. Even during the 2 minutes that
operation stops, the operating light remains illuminated. The rear window
defogger will continue to operate in this cycle until it is turned off.
■ Customization that can be configured at SUBARU dealer (vehicles with
an automatic air conditioning system)
The rear window defogger can be set to 15-minute operation or continuous
operation. (Customizable features →P. 522)
WARNING
■When the outside rear view mirror defoggers are on (vehicles with out-
side rear view mirror defoggers)
Do not touch the outside surface of the rear view mirrors, as they can
become very hot and burn you.
CAUTION
■To prevent battery discharge
Do not leave the rear window defogger on longer than necessary when the
engine is stopped.