engine SUBARU BRZ 2018 Service Manual

170 2-1. Driving procedures
BRZ_U (A4450BE-A)
CAUTION
■Avoiding damage to vehicle parts
●Do not turn the steering wheel fully in either direction and hold it there for
an extended period of time.
Doing so may damage the power steering motor.
● When driving over bumps in the road, drive as slowly as possible to avoid
damaging the wheels, underside of the vehicle, etc.
● On vehicles with an automatic transmission, do not race the engine for
more than 5 seconds in any position except the N or P position when the
brake is applied or when chocks are used in the wheels. This may cause
the transmission fluid to overheat.
■ Avoiding damage to the under spoilers (tS models)
On vehicles with under spoilers, be careful when driving, as the ground
clearance will be lower than a vehicle without them as follows:
●Front under spoiler: Ground clearance at the front of each front wheel arch
and the center of the front bumper is lower by approximately 0.4 in. (1 cm)
and 1.6 in. (4 cm), respectively.
● Side under spoilers: Ground clearance at the sides of the vehicle is lower
by approximately 1.2 in. (3 cm).
● Rear under spoilers: Ground clearance at each corner of the rear bumper
is lower by approximately 0.4 in. (1 cm).
■ Replacement of brake pad and lining
If you continue to drive despite the scraping noise from the audible brake
pad wear indicator, it will result in the need for costly brake rotor repair or
replacement.
■ Breaking-in of new brake pads and linings
Pulling the parking brake lever too forcefully may cause the rear wheels to
lock. To avoid this, be certain to pull the lever up slowly and gently.

171
2-1. Driving procedures
2
When driving
BRZ_U (A4450BE-A)
CAUTION
■
If you get a flat tire while driving
A flat or damaged tire may cause the following situations. Hold the steering
wheel firmly and gradually depress the brake pedal to slow down the vehicle.
● It may be difficult to control your vehicle.
● The vehicle will make abnormal sounds or vibrations.
● The vehicle will lean abnormally.
Information on what to do in case of a flat tire ( →P. 457)
■ When encountering flooded roads
Do not drive on a road that has flooded after heavy rain etc. Doing so may
cause the following serious damage to the vehicle:
● Engine stalling
● Short in electrical components
● Engine damage caused by water immersion
In the event that you drive on a flooded road and the vehicle is flooded, be
sure to have your SUBARU dealer check the following:
● Brake function
● Changes in quantity and quality of oil and fluid used for the engine, trans-
mission, differential, etc.
● Lubricant condition for the propeller shaft, bearings and suspension joints
(where possible) and the function of all joints, bearings, etc.

172
2-1. Driving procedures
BRZ_U (A4450BE-A)
Push-button ignition switch (vehicles with a keyless access with push button star t system)
Performing the following operations when carrying the access key
on your person starts the engine or changes push-button ignition
switch modes.
■Starting the engine
Vehicles with an automatic transmission Check that the parking brake is set.
Check that the select lever is set in P.
If the select lever is not set in P, the engine may not be started.
(→ P. 185)
Firmly depress the brake pedal.
The keyless access with push button start system indicator light
(green) will turn on. If the indicator light does not turn on, the
engine cannot be started.
Press the push-button ignition
switch shortly and firmly.
When operating the push-but-
ton ignition switch, one short,
firm press is enough. It is not
necessary to press and hold
the switch.
The engine will crank until it
starts or for up to 10 seconds,
whichever is less.
Continue depressing the brake
pedal until the engine is com-
pletely started.
The engine can be started
from any push-button ignition
switch mode.
STEP 1
STEP 2
STEP 3
STEP 4

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2-1. Driving procedures
2
When driving
BRZ_U (A4450BE-A)
Vehicles with a manual transmission
Check that the parking brake is set.
Check that the shift lever is set in neutral.
Firmly depress the clutch pedal.
The keyless access with push button start system indicator light
(green) will turn on. If the indicator light does not turn on, the
engine cannot be started.
Press the push-button ignition
switch shortly and firmly.
When operating the push-but-
ton ignition switch, one short,
firm press is enough. It is not
necessary to press and hold
the switch.
The engine will crank until it
starts or for up to 10 seconds,
whichever is less.
Continue depressing the clutch
pedal until the engine is com-
pletely started.
The engine can be started
from any push-button ignition
switch mode.
STEP 1
STEP 2
STEP 3
STEP 4

174 2-1. Driving procedures
BRZ_U (A4450BE-A)
■Stopping the engine
Vehicles with an automatic transmission Stop the vehicle.
Shift the select lever to P.
Set the parking brake. ( →P. 197)
Release the brake pedal.
Press the push-button ignition
switch.
Check that the keyless access
with push button start system
indicator light (green) is off.
STEP 1
STEP 2
STEP 3
STEP 4
STEP 5

176 2-1. Driving procedures
BRZ_U (A4450BE-A)
■Changing push-button ignition switch mode
Modes can be changed by pressing the push-button ignition switch
with the brake pedal (vehicles with an automatic transmission) or
clutch pedal (vehicles with a manual transmission) released. (The
mode changes each time the switch is pressed.)
Off*
The hazard warning flashers
can be used.
The keyless access with push
button start system indicator
light (green) is off.
“ACC” mode
Some electrical components
such as the power outlet can
be used.
The keyless access with push
button start system indicator
light (green) flashes slowly.
“ON” mode
All electrical components can
be used.
The keyless access with push
button start system indicator
light (green) flashes slowly.
*: Vehicles with an automatic transmission: If the select lever
is in a position other than P
when turning off the engine, the
push-button ignition switch will
be turned to “ACC” mode, not
to off.

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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.