engine SUBARU IMPREZA 2005 2.G Repair Manual

7-26
Starting and operating
sure greater traction. T
1 (First)
This position is for driving up or down very steep
grades, or driving through mud or sand, or on slippery
surfaces. In this position, the transmission holds in the
1st gear. T Maximum speeds
The following tables show the maximum speeds that
are possible with each different gear.
When shifting down a gear, it is important to confirm
that the current vehicle speed is not in excess of the
Maximum Allowable Speed of the gear which is about
to be selected. mph (km/h)
NOTE
In order to prevent over-revving during decelera-
tion of the vehicle, the transmission will remain in
the current gear if the speed of the vehicle is in ex-
cess of the Maximum Allowable Speed for the gear
to which the selector lever has been moved.
When shifting down a gear, ensure that the ve-
hicle is not travelling at a speed exceeding the
Maximum Allowable Speed for the gear which
is about to be selected. Failure to observe this
precaution can lead to engine over-revving and
this in turn can result in engine damage.
In addition, sudden application of engine
brakes when the vehicle is travelling on a slip-
pery surface can lead to wheel locking; as a2.5-liter non-turbo
models 2.0-liter turbo models
1 28 (45) 28 (45)
2 62 (99) 58 (93)
3 95 (153) 99 (158)

7-27
Starting and operating
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consequence, control of the vehicle may be lost
and the risk of an accident increased.
T Driving tips
y Always apply the foot or parking brake when the ve-
hicle is stopped in the “D”, “3”, “2”, “1” or “R” position. y Always set the parking brake when parking your ve-
hicle. Do not hold the vehicle with only the transmis-
sion.y Do not keep the vehicle in a stationary position on
an uphill grade by using the “D”, “3”, “2”, or “1” position.
Use the brake instead.
The engine may, on rare occasions, knock when the
vehicle rapidly accelerates or rapidly pulls away from
a standstill. This phenomenon is not an indication of a
problem in your vehicle. „ Shift lock release
If the selector lever does not move from the “P” posi-
tion with the brake pedal depressed and the ignition
switch in the “ON” position, perform the following
steps:
To override the shift lock:
1. Set the parking brake and stop the engine.
2. Take out the screwdriver from the tool bag. 3. Remove the cover by prying on the edge with the
screwdriver.
P
RND321
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7-28
Starting and operating
4. Insert the screwdriver into the hole.
5. Push down on the screwdriver and move the selec-
tor lever from the “P” to the “N” position.
6. Remove the screwdriver from the hole. Depress
the brake pedal and start the engine.
Take your vehicle to the nearest SUBARU dealer im-
mediately to have the system repaired.
Limited slip differential (LSD) (if
equipped)
The LSD provides optimum distribution of power ac-
cording to the difference in revolutions between the
right and left wheels that may be caused by certain
driving conditions, thereby improving driving stability
on snow-covered, muddy or other slippery roads or
when high speed driving.
NOTE (WRX-STi)
The rear differential may emit a knocking sound
when the vehicle is driven slowly with the steering wheel turned fully to either side. This sound oc-
curs because of the design of the mechanical LSD.
It does not indicate a problem.
y
Never start the engine while a tire on one side
is jacked up, as the vehicle may move. y If one tire is spinning in mud, avoid continued
spinning at high speed as this could adversely
affect the LSD. y If you use a temporary spare tire to replace a
flat tire, be sure to use the original temporary
spare tire stored in the vehicle. Using other siz-
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Starting and operating
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es will adversely affect the LSD.Power steering
The power steering system operates only when the
engine is running.
If you lose power steering assist because the engine
stops or the system fails to function, you can steer but
it will take much more effort.
NOTE
Right after the engine has been started and before
it has warmed up, you may hear a noise coming
from areas adjacent to the power steering pump
which is located at the right-front area of the en-
gine compartment. This noise is normal. It does
not indicate power steering system trouble.
Do not hold the steering wheel at the fully
locked position left or right for more than five
seconds. This may damage the power steering
pump.

7-30
Starting and operating
Braking „
Braking tips
Never rest your foot on the brake pedal while
driving. This can cause dangerous overheating
of the brakes and needless wear on the brake
pads and linings.
T When the brakes get wet
When driving in rain or after washing the vehicle, the
brakes may get wet. As a result, brake stopping dis-
tance will be longer. To dry the brakes, drive the vehi-
cle at a safe speed while lightly depressing the brake
pedal to heat up the brakes. T Use of engine braking
Remember to make use of engine braking in addition
to foot braking. When descending a grade, if only the
foot brake is used, the brakes may start working im-
properly because of brake fluid overheating, caused
by overheated brake pads. To help prevent this, shift
into a lower gear to get stronger engine braking. T
Braking when a tire is punctured
Do not depress the brake pedal suddenly when a tire
is punctured. This could cause a loss of control of the
vehicle. Keep driving straight ahead while gradually
reducing speed. Then slowly pull off the road to a safe
place. „ Brake system
T Two separate circuits
Your vehicle has two separate circuit brake systems.
Each circuit works diagonally across the vehicle. If one
circuit of the brake system should fail, the other half of
the system still works. If one circuit fails, the brake
pedal will go down much closer to the floor than usual
and you will need to press it down much harder. And a
much longer distance will be needed to stop the vehi- cle. T Brake booster
The brake booster uses engine manifold vacuum to
assist braking force. Do not turn off the engine while
driving because that will turn off the brake booster, re-
sulting in poor braking power.
The brakes will continue to work even when the brake
booster completely stops functioning. If this happens,
however, you will have to push the pedal much harder

7-32
Starting and operating
y
When driving on badly surfaced roads, gravel
roads, icy roads, or over deep newly fallen
snow, stopping distances may be longer for a
vehicle with the ABS system than one without.
When driving under these conditions, there-
fore, reduce your speed and leave ample dis-
tance from other vehicles. y When you feel the ABS system operating,
you should maintain constant brake pedal pres-
sure. Do not pump the brake pedal since doing
so may defeat the operation of the ABS system.
„ ABS system self-check
You may feel a slight shock in the brake pedal and
hear the operating sound of ABS from the engine com-
partment just after the vehicle is started. This is
caused by an automatic functional test of the ABS sys-
tem being carried out and does not indicate any abnor-
mal condition. „
ABS warning light
The ABS warning light comes on when the ignition
switch is turned to the “ON” position and goes out after
about two seconds.
This is an indication that the ABS system is working
properly.
When driving with an insufficient battery voltage such
as when the engine is jump started, the ABS warning
light may come on. This is due to the low battery volt-
age and does not indicate a malfunction. When the
battery becomes fully charged, the light will go out.
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Starting and operating
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If the warning light behaves as follows, the ABS
system may not be working properly.
When the warning light is on, the ABS function
shuts down; however, the conventional brake
system continues to operate normally. yThe warning light does not come on when the
ignition switch is turned to the “ON” position. y The warning light comes on when the ignition
switch is turned to the “ON” position, but it
does not go out even when the vehicle speed
exceeds approximately 8 mph (12 km/h). y The warning light comes on during driving.
If these occur, have the ABS system repaired at
the first available opportunity by your SUBARU
dealer.
NOTE
If the warning light behavior is as described be-
low, the ABS system may be considered normal. y The warning light comes on right after the en-
gine is started but goes out immediately, remain-
ing off. y The warning light remains on after the engine
has been started, but it goes out when the vehicle speed reaches about 8 mph (12 km/h).y
The warning light comes on during driving, but
it goes out immediately and remains off.

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Starting and operating
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light illuminate simultaneously, take the following
steps:
1. Stop the vehicle in the nearest safe, flat place.
2. Shut down the engine, then restart it.
3. Release the parking brake. If both warning lights go
out, the EBD system may be faulty. Drive carefully to
the nearest SUBARU dealer and have the system in-
spected.
4. If both warning lights come on again and stay illu-
minated after the engine has been restarted, shut
down the engine again, apply the parking brake, and
check the brake fluid level.
5. If the brake fluid level is not below the “MIN” mark,
the EBD system may be faulty. Drive carefully to the
nearest SUBARU dealer and have the system inspect-
ed.
6. If the brake fluid level is below the “MIN” mark, DO
NOT drive the vehicle. Instead, have the vehicle towed
to the nearest SUBARU dealer for repair.
yDriving with the brake system warning light
on is dangerous. This indicates your brake sys-
tem may not be working properly. If the light re-
mains on, have the brakes inspected by a
SUBARU dealer immediately. y If at all in doubt about whether the brakes are operating properly, do not drive the vehicle.
Have your vehicle towed to the nearest
SUBARU dealer for repair.

7-36
Starting and operating
Parking your vehicle „
Parking brake
To set the parking brake, press the brake pedal firmly
and hold it down while fully pulling up the parking
brake lever.
To release the parking brake, pull the lever up slightly,
press the release button, then lower the lever while
keeping the button pressed.
When the parking brake is set while the engine is run-
ning, the parking brake warning light comes on. After
starting the vehicle, be sure that the warning light has
gone out before the vehicle is driven. Refer to the “Warning and indicator lights” section (chapter 3).
Never drive while the parking brake is set be-
cause this will cause unnecessary wear on the
brake linings. Before starting to drive, always
make sure that the parking brake has been fully
released.
„ Parking tips
When parking your vehicle, always set the parking brake firmly and put the shift lever in the “1” (1st) for an
upgrade or “R” (Reverse) for a downgrade for manual
transmission vehicles, or in the “P” (Park) position for
automatic transmission vehicles. Always set the park-
ing brake firmly when parking your vehicle. Never rely
on the transmission alone to hold the vehicle.
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Starting and operating
they may burn easily if they come near hot en-
gine or exhaust system parts.y
Be sure to stop the engine if you take a nap in
the vehicle. If engine exhaust gas enters the
passenger compartment, occupants in the ve-
hicle could die from carbon monoxide (CO)
contained in the exhaust gas.
If your vehicle has a front underspoiler and rear
underspoiler (both optional), pay attention to
blocks and other obstructions on the ground
when parking. The underspoilers could be dam-
aged by contact with them.
Cruise control
Cruise control enables you to maintain a constant ve-
hicle speed without holding your foot on the accelera-
tor pedal and it is operative when the vehicle speed is
25 mph (40 km/h) or more. Make sure the main switch
is turned “OFF” when the cruise control is not in use to
avoid unintentionally setting the cruise control.
NOTE
If you move the cruise control lever while turning
the ignition switch “ON”, the cruise control func-
tion is deactivated and the “CRUISE” indicator
light flashes. To reactivate the cruise control func-
tion, turn the ignition switch back to the “ACC” or
“LOCK” position, and then turn it again to the “ON” position.
Do not use the cruise control under any of the
following conditions. This may cause loss of
vehicle control:y driving up or down a steep grade
y driving on slippery or winding roads
ydriving in heavy traffic