engine SUBARU IMPREZA 2002 2.G Service Manual

Starting and operating
7-21
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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

Starting and operating
7-23
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CAUTION
The ABS system does not always decrease
stopping distance. You should always main- tain a safe following distance from other ve- hicles. When driving on badly surfaced roads, grav-
el 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. When you feel the ABS system operating,
you should maintain constant brake pedal
pressure. 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
compartment just after the vehicle is started. This iscaused by an automatic functional test of the ABS
system being carried out and does not indicate any
abnormal condition.
ABS warning light
HG1016FA
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 voltage and does not indicate a malfunction.
When the battery becomes fully charged, the light will go out.

Starting and operating
7-24
CAUTION
If the warning light behaves as follows, the
ABS system may not be working 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 vehicle speed exceeds approximately 8 mph (12km/h). The warning light comes on during driving.
If these occur, have the ABS system repairedat the first available opportunity by your
SUBARU dealer.
NOTE If the warning light behavior is as described
below, the ABS system may be considered nor- mal. 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.

Starting and operating
7-25
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Parking your vehicle
WARNING
Never leave unattended children or pets in
the vehicle. They could accidentally injure
themselves or others through inadvertent op-
eration of the vehicle. Also, on hot or sunny
days, the temperature in a closed vehiclecould quickly become high enough to cause
severe or possibly fatal injuries to people. Do not park the vehicle over flammable ma-
terials such as dry grass, waste paper or rags,as they may burn easily if they come near hotengine or exhaust system parts. 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.
CAUTION
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 ful-ly released.
To set the parking brake, press the brake pedal firm-ly and hold it down while fully pulling up the parking
brake lever.
HB4001BA
To release the parking brake, pull the lever up slight-
ly, press the release button, then lower the lever
while keeping the button pressed.
When the parking brake is set while the engine is

8
8-1
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New vehicle break-in driving –
the first 1,000 miles (1,600 km) 8-2 . . . . . . . . . . . . . . .
Fuel economy hints 8-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine exhaust gas (Carbon monoxide) 8-3 . . . .
Catalytic converter 8-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Periodic inspections 8-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving in foreign countries 8-6 . . . . . . . . . . . . . . . . . . . . .
Driving tips for AWD vehicles 8-6 . . . . . . . . . . . . . . . . . .
Off road driving 8-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
All AWD models except OUTBACK SPORT 8-8 . . .
OUTBACK SPORT 8-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Winter driving 8-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation during cold weather 8-10 . . . . . . . . . . . . . . . . .
Driving on snowy and icy roads 8-12 . . . . . . . . . . . . . . . .
Corrosion protection 8-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Snow tires 8-13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire chains 8-14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rocking the vehicle 8-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading your vehicle 8-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vehicle capacity weight 8-16 . . . . . . . . . . . . . . . . . . . . . . . . . .
GVWR and GAWR (Gross Vehicle Weight
Rating and Gross Axle Weight Rating) 8-17 . . . . . .
Roof rail and crossbar (if equipped) 8-18 . . . . . . . . . . .
Trailer hitch (if equipped) 8-23 . . . . . . . . . . . . . . . . . . . . . . . .
Connecting a trailer 8-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
When you do not tow a trailer 8-26 . . . . . . . . . . . . . . . . . . .
Trailer towing 8-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Warranties and maintenance 8-27
. . . . . . . . . . . . . . . . . . . .
Maximum load limits 8-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trailer hitches 8-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting a trailer 8-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trailer towing tips 8-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving tips

Driving tips
8-2
New vehicle break-in driving –
the first 1,000 miles (1,600 km)
The performance and long life of your vehicle are
dependent on how you handle and care for your ve-
hicle while it is new. Follow these instructions duringthe first 1,000 miles (1,600 km): Do not race the engine. And do not allow engine
speed to exceed 4,000 rpm except in an emergen-
cy. Do not drive at one constant engine or vehicle
speed for a long time, either fast or slow. Avoid starting suddenly and rapid acceleration,
except in an emergency. Avoid hard braking, except in an emergency.
The same break-in procedures should be applied to
an overhauled engine, newly mounted engine or
when brake pads or brake linings are replaced withnew ones. Fuel economy hints The following suggestions will help to save your fuel.
Select the proper gear position for the speed and
road conditions. Avoid sudden acceleration or deceleration. Al-
ways accelerate gently until you reach the desired
speed. Then try to maintain that speed for as longas possible. Do not pump the accelerator and avoid racing the
engine. Avoid unnecessary engine idling.
Keep the engine properly tuned.
Keep the tires inflated to the correct pressure
shown on the tire placard, which is located under the door latch on the driver ’s side. Low pressure will
increase tire wear and fuel consumption. Use the air conditioner only when necessary.
Keep the front and rear wheels in proper align-
ment. Avoid carrying unnecessary luggage or cargo.

Driving tips
8-3
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Engine exhaust gas (Carbon monoxide)
WARNING
Never inhale engine exhaust gas. Engine ex-
haust gas contains carbon monoxide, a color-
less and odorless gas which is dangerous, or even lethal, if inhaled. Always properly maintain the engine ex-
haust system to prevent engine exhaust gasfrom entering the vehicle. Never run the engine in a closed space,
such as a garage, except for the brief time needed to drive the vehicle in or out of it. Avoid remaining in a parked vehicle for a
lengthy time while the engine is running. Ifthat is unavoidable, then use the ventilationfan to force fresh air into the vehicle. Always keep the front ventilator inlet grille
free from snow, leaves or other obstructionsto ensure that the ventilation system always
works properly. If at any time you suspect that exhaust
fumes are entering the vehicle, have the prob-lem checked and corrected as soon as pos- sible. If you must drive under these condi-tions, drive only with all windows fully open.
Keep the trunk lid or rear gate closed while
driving to prevent exhaust gas from enteringthe vehicle.
NOTE Due to the expansion and contraction of the met-
als used in the manufacture of the exhaust sys-
tem, you may hear a crackling sound comingfrom the exhaust system for a short time afterthe engine has been shut off. This sound is nor-mal.

Driving tips
8-4
Catalytic converter
HG8000BA
Turbo models
HB3003BA
Non-turbo models
The catalytic converter is installed in the exhaust
system. It serves as catalyst to reduce HC, CO and
NOx in exhaust gases, thus providing cleaner ex- haust.
To avoid damage to the catalytic converter: Use only unleaded fuel. Even a small amount of
leaded fuel will damage the catalytic converter. Never start the engine by pushing or pulling the
vehicle. Avoid racing the engine.
Never turn off the ignition switch while the vehicle
is moving. Keep your engine tuned-up. If you feel the engine

Driving tips
8-5
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running rough (misfiring, backfiring or incomplete
combustion), have your vehicle checked and re-
paired by an authorized SUBARU dealer.Do not apply undercoating or rust prevention
treatment to the heat shield of catalytic converterand the exhaust system.
WARNING
Avoid fire hazards. Do not drive or park the
vehicle anywhere near flammable materials
(e.g. grass, paper, rags or leaves), because the catalytic converter operates at very hightemperatures. Keep everyone and flammable materials
away from the exhaust pipe while the engineis running. The exhaust gas is very hot. Periodic inspections
To keep your vehicle in the best condition at all
times, always have the recommended maintenance
services listed in the maintenance schedule in the“
Warranty and Maintenance Booklet ” performed at
the specified time or mileage intervals.

Driving tips
8-6
Driving in foreign countries
When planning to use your vehicle in another coun-
try:Confirm the availability of the correct fuel. (Refer
to the “Fuel requirement ” section in chapter 7.)
Comply with all regulations and requirements of
each country. Driving tips for AWD vehicles
HS0113
All wheel drive distributes the engine power to all
four wheels. AWD vehicles provide better traction
when driving on slippery, wet or snow-covered
roads and when moving out of mud, dirt and sand.
By shifting power between the front and rear wheels,
SUBARU AWD can also provide added traction dur-
ing acceleration and added engine braking force during deceleration.
Therefore, your SUBARU AWD vehicle may handle
differently than an ordinary two wheel drive vehicle
and it contains some features unique to AWD. For safety purposes as well as to avoid damaging the