2003 SUBARU IMPREZA WRX brake fluid

Instruments and controls
3-13
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CAUTION
Do not operate the engine with the oil pres- sure warning light on. This may cause serious engine damage.
AT OIL TEMPerature warning
light (for AT vehicles)
If this light comes on when the engine is running, it may indicate that the automatic transmission fluid
temperature is too hot.
If the light comes on while driving, it is unnecessary
to stop the vehicle, but avoid driving up steep
grades or in stop and go traffic.
Automatic transmission control system warn- ing
If the light flashes after the engine starts, it may indi-
cate that the automatic transmission control system
is not working properly. Contact your nearest
SUBARU dealer for service immediately.
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.
CAUTION
If the warning light behaves as follows, the
ABS system may not work properly. When the warning light is on, the ABS func-
tion shuts down; however, the conventional
brake system continues to operate normally.
The warning light does not come on when
the ignition switch is turned to the “ON” posi-
tion. The warning light comes on when the igni-
tion switch is turned to the “ON” position, but
it does not go out even when the vehiclespeed exceeds approximately 8 mph (12km/h). 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 shown below, the ABS system may be considered normal.
(U.S.) (Canada)

Instruments and controls
3-14
The warning light comes on right after the
engine is started but goes out immediately, remaining off. 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). The warning light comes on during driving, but
it goes out immediately and remains off.
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 voltage and does not indicate a malfunction.
When the battery becomes fully charged, the lightwill go out. Brake system warning light
WARNING
Driving with the brake system warning light
on is dangerous. This indicates your brake
system may not be working properly. If thelight remains on, have the brakes inspected
by a SUBARU dealer immediately. If at all in doubt about whether the brakes are operating properly, do not drive the ve-
hicle. Have your vehicle towed to the nearest
SUBARU dealer for repair.
This light has the following two functions: Parking brake warning
The light comes on with the parking brake applied while the ignition switch is in the “ON” position. It
goes out when the parking brake is fully released.
Brake fluid level warning
This light comes on when the brake fluid level has
dropped to near the “MIN” level of the brake fluid
reservoir with the ignition switch in the “ON” position
and with the parking brake fully released.
If the brake system warning light should come on
while driving (with the parking brake fully releasedand with the ignition switch positioned in “ON”), it
could be an indication of leaking of brake fluid or
worn brake pads. Have your vehicle checked by a
SUBARU dealer immediately. Door open warning lights
The door open warning light comes on if any door or
the rear gate is not fully closed.
(U.S.)
(Canada)

Starting and operating
7-8
mination is observed, there is no stored diagnostic
trouble codes, and the OBD system readiness moni-
tors are complete. A vehicle fails
the OBD inspection if the “CHECK
ENGINE ” warning light/MIL is not properly operating
or there is one or more diagnostic trouble codes
stored in vehicle ’s computer with the “CHECK
ENGINE ” warning light/MIL illuminated.
A state emission inspection may reject (not pass
or fail) a vehicle if the number of OBD system readi- ness monitors “Not Ready ” is greater than three.
Under this condition, the vehicle operator should be instructed to drive his/her vehicle for a few days to
set the monitors and return for an emission re-in-spection. Owners of rejected or failing vehicles should con-
tact their Subaru Dealer for service. Preparing to drive
You should perform the following checks and adjust-
ments every day before you start driving.
1. Check that all windows, mirrors, and lights are
clean and unobstructed.
2. Check the appearance and condition of the tires.
Also check tires for proper inflation.
3. Look under the vehicle for any sign of leaks.
4. Check that the hood, trunk and rear gate are fullyclosed.
5. Check the adjustment of the seat.
6. Check the adjustment of the inside and outside
mirrors.
7. Fasten your seatbelt. Check that your passen-gers have fastened their seatbelts.
8. Check the operation of the warning and indicator
lights when the ignition switch is turned to the
“ON”
position.
9. Check the gauges, indicator and warning lights
after starting the engine. NOTE Engine oil, engine coolant, brake fluid, washer
fluid and other fluid levels should be checked
daily, weekly or at fuel stops.

Starting and operating
7-14
labor.
On steep downgrades, downshift the transmission
to 4th, 3rd or 2nd gear as necessary; this helps to
maintain a safe speed and to extend brake pad life.
In this way, the engine provides a braking effect. Re-
member, if you “ride” (over use) the brakes while de-
scending a hill, they may overheat and not work
properly.
The engine may, on rare occasions, knock when the
vehicle rapidly accelerates or rapidly pulls away
from a standstill. This phenomenon does not indi-
cate a fault. Automatic transmission
The automatic transmission is electronically con-
trolled with 4-forward speeds and 1-reverse speed. NOTE
Immediately after a disconnected battery is re-
connected or ATF (automatic transmission fluid) is replaced, you may feel that the automatic
transmission operation is somewhat unusual.
This results from erasure or invalidation of data
the on-board computer has collected and storedin memory to allow the transmission to shift at the most appropriate times for the current condi- tion of your vehicle. Optimized shifting will be re-stored as the vehicle continues to be driven for awhile.
WARNING
Do not shift from the
“P” or “N” position into
the “D”, “3”, “2”, “1” or “R” position while de-
pressing the accelerator pedal. This may
cause the vehicle to jump forward or back- ward.

Starting and operating
7-15
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CAUTION
Shift into the “P” or “R” position only after
the vehicle is completely stopped. Shifting while the vehicle is moving may cause dam- age to the transmission. Do not race the engine for more than five
seconds in any position except the “N” or “P”
position when the brake is set or the tires areon blocks. This may cause the automatic
transmission fluid to overheat. Avoid shifting from one of the forward driv-
ing positions into the “R” position or vice
versa until the vehicle has completelystopped. Such shifting may cause damage tothe transmission.
Selector lever for automatic transmis- sion

Starting and operating
7-17
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WARNING
Do not drive the vehicle with the selector lever in the “N” (neutral) position. Engine braking
has no effect in this condition and the risk ofan accident is consequently increased.
D (Drive)
This position is for normal driving.The transmission automatically shifts into a suitable
gear from 1st to 4th according to the vehicle speed
and the acceleration you require.
When more acceleration is required in this position,
press the accelerator pedal fully to the floor andhold that position. The transmission will automatical-
ly downshift to 3rd, 2nd or 1st gear. When you re-
lease the pedal, the transmission will return to the
original gear position.
n While climbing a grade
When driving up hill, undesired upshift to 4th gear is
prevented from taking place when the accelerator
pedal is released. This minimizes the chances of subsequent downshifting to a lower gear when ac-
celerating again. This prevents repeated upshifting
and downshifting resulting in a smoother operation of the vehicle.
NOTE The transmission may downshift to 2nd or 1st
gear, depending on the way the accelerator pedalis pressed to accelerate the vehicle again. n While going down a hill
When descending a steep hill, depressing the brake
pedal will cause the transmission to downshift to 3rd
gear, thus applying engine braking. Reacceleration
for a short time will cause the transmission to upshift
normally. NOTE In some cases, depressing the brake pedal on a downhill grade does not result in an automatic
downshift to 3rd gear. This can happen when theautomatic transmission fluid temperature is very
low, for example, during driving shortly after the
vehicle has been parked for an extended period
of time. When the ATF temperature has risen to a
certain level, automatic downshift normally takes
place. In the meantime, downshift manually forengine braking as required.Also, downshifting when braking downhill willnot occur at speeds above approximately 48 mph(78 km/h).

Starting and operating
7-22
Braking Braking tips
WARNING
Never rest your foot on the brake pedal while driving. This can cause dangerous overheat- ing of the brakes and needless wear on thebrake pads and linings.
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 ve-
hicle at a safe speed while lightly depressing thebrake pedal to heat up the brakes.
Use of engine braking
Remember to make use of engine braking in addi-
tion to foot braking. When descending a grade, if
only the foot brake is used, the brakes may start
working improperly because of brake fluid overheat-
ing, caused by overheated brake pads. To help pre-
vent this, shift into a lower gear to get stronger
engine braking.
Braking when a tire is punctured
Do not depress the brake pedal suddenly when a
tire is punctured. This could cause a loss of controlof the vehicle. Keep driving straight ahead while
gradually reducing speed. Then slowly pull off the
road to a safe place. Brake system
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, thebrake 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 vehicle.
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,
resulting 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

Driving tips
8-10
it more prone to tip over. If you must rock the vehicle to free it from sand or
mud, depress the accelerator pedal slightly and
move the selector lever back and forth between “D”
and “R” repeatedly. Do not race the engine. For the
best possible traction, avoid spinning the wheels
when trying to free the vehicle.
When the road surface is extremely slippery, you
can obtain better traction by starting the vehicle withthe transmission in 2nd than 1st (both for MT and
AT). Never equip your vehicle with tires larger than
those specified in this manual. Frequent driving of an AWD vehicle under hard-
driving conditions such as rough roads or off roads
will necessitate more frequent replacement of engine
oil, brake fluid and transmission oil than that specified
in the maintenance schedule described in the “War -
ranty and Maintenance Booklet ”.
Remember that damage done to your Subaru while
operating it off-road and not using common sense
precautions such as those listed above is not eligi-ble for warranty coverage. Winter driving

Operation during cold weather
Carry some emergency equipment, such as tire
chains, a window scraper, a bag of sand, flares, a small shovel, and jumper cables.
Check the battery and cables. Cold temperatures
reduce battery capacity. The battery must be in
good condition to provide enough power for cold
winter starts.
Use an engine oil of proper grade and viscosity for