check engine light SUBARU LEGACY 2006 4.G User Guide

4-12 Climate control
Operating tips for heater and
air conditioner „Cleaning ventilator grille
Always keep the front ventilator inlet grille
free of snow, leaves, or other obstructions
to ensure efficient heating and defrosting.
Since the condenser is located in front of
the radiator, this area should be kept
clean because cooling performance is im-
paired by any accumulation of insects and
leaves on the condenser. „ Efficient cooling after parking
in direct sunlight
After parking in direct sunlight, drive with
the windows open for a few minutes to al- low outside air to circulate into the heated
interior. This results in quicker cooling by
the air conditioner. Keep the windows
closed during the operation of the air con-
ditioner for maximum cooling efficiency. „
Lubrication oil circulation in
the refrigerant circuit
Operate the air conditioner compressor at
a low engine speed (at idle or low driving
speeds) a few minutes each month during
the off-season to circulate its oil. „ Checking air conditioning
system before summer sea-son
Check the air conditioner unit for refriger-
ant leaks, hose conditions, and proper op-
eration each spring. Have your SUBARU
dealer perform this check. „ Cooling and dehumidifying in
high humidity and low tem-
perature weather condition
Under certain weather conditions (high
relative humidity, low temperatures, etc.)
a small amount of water vapor emission
from the air outlets may be noticed. This
condition is normal and does not indicate any problem with the air conditioning sys-
tem. „
Air conditioner compressor
shut-off when engine is
heavily loaded
To improve acceleration and gas mileage,
the air conditioner compressor is de-
signed to temporarily shut off during air
conditioner operation whenever the accel-
erator is fully depressed such as during
rapid acceleration or when driving on a
steep upgrade. „ Refrigerant for your climate
control system
Your air conditioner uses ozone friendly
refrigerant HFC134a. Therefore, the
method of adding, changing or checking
the refrigerant is diffe rent from the method
for CFC12 (freon). Consult your SUBARU
dealer for service. Repairs needed as a
result of using the wrong refrigerant are
not covered under warranty.
400590

7
Starting and operating
Fuel ...................................................................... 7-2 Fuel requirements .................................................. 7-2
Fuel filler lid and cap .............................................. 7-4
State emission testing (U .S. only) .................... 7-6
Preparing to drive .............................................. 7-7
Starting the engine ............................................. 7-8 Manual transmission vehicle ................................. 7-8
Automatic transmission vehicle ............................ 7-8
Stopping the engine ........................................... 7-9
Manual transmission ......................................... 7-9 Shifting speeds ....................................................... 7-10
Driving tips .............................................................. 7-11
Automatic transmission – 4- speed ................... 7-11
Selector lever .......................................................... 7-12
Selector lever reverse inhibiting function ............ 7-13
Selection of manual mode ..................................... 7-14
Maximum speeds .................................................... 7-15
Driving tips .............................................................. 7-16
SPORT mode ........................................................... 7-16
Shift lock release . ........................................... ........ 7-16
Automatic transmission – 5- speed ................... 7-17
Selector lever .......................................................... 7-18
Selector lever reverse inhibiting function ............ 7-19
Selection of manual mode ..................................... 7-20
Maximum speeds .................................................... 7-22
Driving tips .............................................................. 7-23
SPORT mode ........................................................... 7-23
Shift lock release . ........................................... ........ 7-23Rear viscous limited slip differential (LSD)
(if equipped) ..................................................... 7-24
Power steering .................................................... 7-25
Braking ................................................................ 7-25 Braking tips ............................................................. 7-25
Brake system .......................................................... 7-25
Disc brake pad wear warning in dicators .............. 7-26
ABS (Anti-lock Brake System) .......................... 7-26 ABS system self-check ......... ................................. 7-26
ABS warning light ................................................... 7-27
Electronic Brake Force Distribution (EBD) system .............................................................. 7-28Steps to take if EBD system fails .......................... 7-28
Vehicle Dynamics Control system (if equipped) ..................................................... 7-29Vehicle Dynamics Control system monitor .......... 7-31
Vehicle Dynamics Control OFF switch ................. 7-32
Tire pressure monitoring system (TPMS) (if equipped) ..................................................... 7-33
Parking your vehicle .......................................... 7-35
Cruise control ..................................................... 7-36 To set cruise control .............................................. 7-37
To temporarily cancel the cruise control ............. 7-37
To turn off the cruise control ................................. 7-38
To change the cruising speed ............................... 7-38
Cruise control indicator light ................................. 7-39
Cruise control set indicator light .......................... 7-39

7-2 Starting and operating
Starting and operatingFuel
„Fuel requirements
T 2.5-liter non-turbo models
The 2.5-liter non-turbo engine is designed
to operate using unleaded gasoline with
an octane rating of 87 AKI or higher. T 2.5-liter turbo models and 3.0-liter models
The 2.5-liter turbo engine and 3.0-liter en-
gine are designed to operate using premi-
um unleaded gasoline with an octane rat-
ing of 91 AKI or higher. If premium unlead-
ed gasoline is not available, regular un-
leaded gasoline with an octane rating of
87 AKI or higher may be temporarily used.
For optimum engine performance and
driveability, it is required (for 2.5-liter turbo
models), and recommended (for 3.0-liter
models) that you use premium grade un-
leaded gasoline.
NOTE
Be sure to use premium unleaded gas- oline of 91 AKI or higher for a 2.5-liter
turbo engine model. If other gasoline
(lower than 91 AKI) is used, knocking,
reduced output and poor accelerator
response will result. T
Fuel octane rating
This octane rating is the average of the
Research Octane and Motor Octane num-
bers and is commonly referred to as the
Anti Knock Index (AKI).
Using a gasoline with a lower octane rat-
ing can cause persistent and heavy
knocking, which can damage the engine.
Do not be concerned if your vehicle some-
times knocks lightly when you drive up a
hill or when you accelerate. See your
dealer or a qualified service technician if
you use a fuel with the specified octane
rating and your vehicle knocks heavily or persistently. T Unleaded gasoline
The neck of the fuel f iller pipe is designed
to accept only an unleaded gasoline filler
nozzle. Under no circumstances should
leaded gasoline be used because it will damage the emission control system and
may impair driveability and fuel economy. T California fuel
If your vehicle was certified to California
Emission Standards as indicated on the underhood tune-up label,
it is designed to
optimize engine and emission control sys-
tem performance with gasoline that meets
the clean burning low-sulfur California
gasoline specifications. If you live in any
other state than Calif ornia, your vehicle
will operate on gasoline meeting Federal
specifications. Gasoline sold outside Cali-
fornia is permitted to have higher sulfur
levels, which may affect the performance
of your vehicle’s catalytic converter and
may produce a sulfur exhaust odor or
smell. SUBARU recomm ends that you try
a different brand of unleaded gasoline
having lower sulfur to determine if the
problem is fuel related before returning
your vehicle to an authorized dealer for
service. The CHECK ENGINE warning
light/Malfunction indicator lamp may also
turn on. If this occurs, return to your autho-
rized SUBARU dealer for diagnosis. If it is
determined that the condition is caused by
the type of fuel us ed, repairs may not be
covered by your warranty. T MMT
Some gasoline contains an octane-en-
hancing additive called MMT (Methylcy-
clopentadienyl Manganese Tricarbonyl). If
you use such fuels, your emission control
system performance may deteriorate and
the CHECK ENGINE warning light/Mal-
Use of a fuel which is low in quality
or use of an inappropriate fuel addi-
tive may cause engine damage.

Starting and operating 7-5
– CONTINUED –
1) Open
2) Close
3. Remove the fuel filler cap by turning it
slowly counterclockwise.
4. Stop filling the tank after the fuel filler
pump automatically cl icks off. Do not add
any more fuel.
5. Put the cap back on, turn it clockwise
until you hear a clicking noise. Be certain
not to catch the tether under the cap while
tightening.
6. Close the fuel filler lid completely.
If you spill any fuel on the painted surface,
rinse it off immediately. Otherwise, the
painted surface could be damaged.
NOTE y
You will see the “ ” sign in the
fuel gauge. This indicates that the fuel
filler door (lid) is located on the right
side of the vehicle. y If the fuel filler cap is not tightened
until it clicks or if the tether is caught
under the cap, the CHECK ENGINE
warning light may come on. Refer to
the “Warning and indicator lights” sec-
tion located in chapter 3.
(Turbo model only) Promptly put fuel in
the tank whenever the low fuel warning
light comes on. Engine misfires as a re-
sult of an empty tank could cause dam-
age to the engine.
y Gasoline vapor is highly flamma-
ble. Before refueling, always first
stop the engine and make sure
that there are no lighted ciga-
rettes, open flames or electrical
sparks in the adjacent area.
1 2
700344
y
When opening the cap, do not re-
move the cap quickly. Fuel may be
under pressure and spray out ofthe fuel filler neck especially in
hot weather, which may cause in-
jury.
200253
y Never add any cleaning agents to the fuel tank. The addition of a
cleaning agent may cause dam-
age to the fuel system.
y Make sure that the cap is tight-
ened until it clicks to prevent fuel
spillage in the event of an acci-
dent.
y Do not let fuel sp ill on the exterior
surfaces of the vehicle. Fuels may
cause paint damage, which is not
covered under the SUBARU Limit-
ed Warranty.

Starting and operating 7-7
Under no circumstances should the rear
wheels be jacked off the ground, nor
should the driveshaft be disconnected for
state emission testing.
The EPA has issued regulations for in-
specting the On-Board Diagnostic (OBD)
system as part of the state emissions in-
spection. The OBD system is designed to
detect engine and transmission problems
that might cause vehicle emissions to ex-
ceed allowable limits. These inspections
apply to all 1996 model year and newer
passenger cars and li ght trucks. Over 30
states plus the Distr ict of Columbia have
implemented the OBD system inspection. y The inspection of the OBD system con-
sists of a visual operational check of the “ CHECK ENGINE ” warning light/malfunc-
tion indicator lamp (MIL) and an examina-
tion of the OBD system with an electronic
scan tool while the engine is running. y A vehicle passes
the OBD system in-
spection if proper the “ CHECK ENGINE”
warning light/MIL illumination is observed, there is no stored diagnostic trouble
codes, and the OBD system readiness
monitors are complete. y 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 EN-
GINE ” warning light/MIL illuminated.
y A state emission inspection may reject
(not pass or fail) a vehicle if the number of
OBD system readiness monitors “ Not
Ready ” is greater than one. 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-inspection. y Owners of rejected or failing vehicles
should contact their SUBARU Dealer for
service.
Preparing to drive
You should perform the following checks
and adjustments 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 infla-tion.
3. Look under the vehicle for any sign of leaks.
4. Check that the hood, trunk (Sedan)
and rear gate (Station wagon) are fully
closed.
5. Check the adjustment of the seat.
6. Check the adjustment of the inside and outside mirrors.
7. Fasten your seatbelt. Check that your
passengers 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 warn-
ing 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.

7-8 Starting and operating
Starting the engine
„Manual transmission vehicle
1. Apply the parking brake.
2. Turn off unnecessary lights and acces-
sories.
3. Press the clutch pedal to the floor and
shift the shift leve r into neutral.
Hold the clutch pedal to the floor while
starting the engine. The starter motor will
only operate when the clutch pedal is
pressed fully to the floor.
4. Turn the ignition switch to the “ON” po-
sition and check the operation of the warn-
ing and indicator lights. Refer to the
“Warning and indicator lights” section
(chapter 3).
5. Turn the ignition sw itch to the “START”
position without depressing the accelera-
tor pedal. Release the key immediately af-
ter the engine has started. If the engine does not
start, try the follow-
ing.
1) Turn the ignition switch to the “OFF”
position and wait for at least 10 sec-
onds. After checking that the parking
brake is firmly set, turn the ignition
switch to the “START” position while de-
pressing the accelerator pedal slightly
(approximately a quarter of the full
stroke). Release th e accelerator pedal
as soon as the engine starts.
2) If this fails to start the engine, turn theignition switch back to the “OFF” posi-
tion and wait for at least 10 seconds.
Then fully depress the accelerator ped-
al and turn the ignition switch to the
“START” position. If the engine starts,
quickly release the accelerator pedal.
3) If this fails to start the engine, turn the
ignition switch again to the “OFF” posi-
tion. After waiting for 10 seconds or
longer, turn the ignition switch to the
“START” position without depressing
the accelerator pedal.
4) If the engine still refuses to start, con-
tact your nearest SUBARU dealer for assistance.
6. Confirm that all warning and indicator
lights have gone off after the engine has
started. The fuel injection system auto-
matically lowers the idle speed as the en-
gine warms up. „
Automatic transmission vehi-
cle1. Apply the parking brake.
2. Turn off unnecessary lights and acces-sories.
3. Shift the selector lever to the “P” or “N”
position (preferably “P” position). The
starter will only operate when the select
lever is at the “P” or “N” position.
4. Turn the ignition switch to the “ON” po-
sition and check the operation of the warn-
ing and indicator li ghts. Refer to the
“Warning and indicator lights” section
(chapter 3).
5. Turn the ignition switch to the “START”
position without depressing the accelera-
tor pedal. Release the key immediately af-
ter the engine has started.
If the engine does not start, try the follow-
ing. 1) Turn the ignition switch to the “OFF”
position and wait for at least 10 sec-
Do not operate the starter motor
continuously for more than ten sec-
onds. If the engine fails to start after
operating the starte
r for five to ten
seconds, wait for ten seconds or
more before trying again.
If you restart the engine while the
vehicle is moving, shift the selector
lever into the “N” position. Do not
attempt to place the selector lever of
a moving vehicle into the “P” posi- tion.

Starting and operating 7-9
– CONTINUED –
onds. After checking that the parking
brake is firmly set, turn the ignition
switch to the “START” position while de-
pressing the accelerator pedal slightly
(approximately a quarter of the full
stroke). Release the accelerator pedal
as soon as the engine starts.
2) If this fails to start the engine, turn the
ignition switch back to the “OFF” posi-
tion and wait for at least 10 seconds.
Then fully depress the accelerator ped-
al and turn the ignition switch to the
“START” position. If the engine starts,
quickly release the accelerator pedal.
3) If this fails to start the engine, turn the
ignition switch again to the “OFF” posi-
tion. After waiting for 10 seconds or
longer, turn the ignition switch to the
“START” position without depressing
the accelerator pedal.
4) If the engine still refuses to start, con-
tact your nearest SUBARU dealer forassistance.
6. Confirm that all warning and indicator
lights have gone out after the engine has
started. The fuel in jection system auto-
matically lowers the idle speed as the en-
gine warms up.
While the engine is warming up, make
sure that the selector lever is at the “P” or
“N” position and that the parking brake is
applied.
Stopping the engine
The ignition switch should be turned off
only when the vehicle is stopped and the
engine is idling.
Manual transmission
The manual transmission is a fully syn-
chromeshed, 5-forward-speed and 1-re-
verse-speed transmission.
Do not stop the engine when the ve-
hicle is moving. This will cause loss
of power to the power steering and
the brake booster, making steering
and braking more difficult. It could
also result in a ccidental activation
of the “LOCK” position on the igni-
tion switch, causing the steering
wheel to lock.Do not drive the vehicle with the
clutch disengaged (i.e., when the
clutch pedal is depressed) or with
the shift lever in the neutral posi-
tion. Engine braking has no effect in
either of these conditions and the
risk of an accident is consequently
increased. Shift into reverse ONLY when the
vehicle has completely stopped. It
may cause damage to the transmis- sion to try shifti ng into reverse
when the vehicle is moving.

7-26 Starting and operating
„Disc brake pad wear warning
indicators
The disc brake pad wear warning indica-
tors on the disc brakes give a warning
noise when the brake pads are worn.
If a squeaking or scraping noise is heard
from the disc brakes while braking, imme-
diately have your vehicle inspected by the
nearest SUBARU dealer. ABS (Anti-lock Brake Sys-
tem)
The ABS system prev
ents the lock-up of
wheels which may occur during sudden
braking or braking on slippery road surfac-
es. This helps prevent the loss of steering
control and directional stability caused by
wheel lock-up. When the ABS system is operating, you
may hear a chattering noise or feel a slight
vibration in the brake pedal. This is normal
when the ABS operates. The ABS system will no t operate when the
vehicle speed is below approximately 6
mph (10 km/h). „ 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 af-
ter the vehicle is started. This is caused by
an automatic functional test of the ABS
system being carried out and does not in-
dicate any abnormal condition.
700040
Always use the utmost care in driv-
ing – overconfidence because you
are driving with an ABS equipped
vehicle could easily lead to a seri-
ous accident. y The ABS system does not always
decrease stopping distance. You
should always maintain a safe fol-
lowing distance from other vehi-
cles.
y When driving on badly surfaced
roads, gravel roads, icy road, 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, therefore,
reduce your speed and leave am-
ple distance from other vehicles.
y 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 op-
eration of the ABS system.

7-28 Starting and operating
Electronic Br ake Force Dis-
tribution (EBD) system
The EBD system maximizes the effective-
ness of the brakes by allowing the rear
brakes to supply a greater proportion of
the braking force. It functions by adjusting
the distribution of brak ing force to the rear
wheels in accordance with the vehicle’s
loading condition and speed.
The EBD system is an integral part of the
ABS system and uses some of the ABS
system’s components to perform its func-
tion of optimizing the distribution of brak-
ing force. If any of the ABS components
used by the EBD function fails, the EBD
system also stops working.
When the EBD system is operating, you
may hear a chattering noise or feel a slight
vibration in the brake pedal. This is normal
and does not indicate a malfunction. „
Steps to take if EBD system fails
If a malfunction occu rs in the EBD system,
the system stops working and the brake system warning light and ABS warning
light come on simultaneously. The EBD system may be faulty if the brake
system warning light and ABS warning
light illuminate simultaneously during driv-
ing.
Even if the EBD system fails, the conven-
tional braking system will still function.
However, the rear wheels will be more
prone to locking when the brakes are ap-
plied harder than usual and the vehicle’s
motion may therefore become somewhat
harder to control.
If the brake system warning light and ABS warning 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 bothwarning lights go out, the EBD system
may be faulty.
Drive carefully to the nearest SUBARU
dealer and have the system inspected.
4. If both warning lights come on again
and stay illuminated 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 in-spected.
6. If the brake fluid level is below the
“MIN” mark, DO NOT drive the vehicle. In-
stead, have the vehicle towed to the near-
est SUBARU dealer for repair.
700349

7-30 Starting and operating
In the event of wheelspin and/or skidding
on a slippery road surface and/or during
cornering and/or an evasive maneuver,
the Vehicle Dynamics Control system ad-
justs the engine’s output and the wheels’
respective braking forces to help maintain
traction and directional control. yTraction Control Function
The traction control function is designed to
prevent spinning of the driving wheels on
slippery road surfaces, thereby helping to
maintain traction and directional control.
Activation of this function is shown by
steady illumination of the Vehicle Dynam-
ics Control operation indicator light. y Skid Suppression Function
The skid suppression function is designed
to help maintain directional stability by
suppressing the wheels’ tendency to slide
sideways during steering operations. Acti-
vation of this function is shown by flashing
of the Vehicle Dynamics Control operation
indicator light.
NOTE y Slight twitching of the brake pedal may be felt when the Vehicle Dynamics
Control system operates; a small de-
gree of vehicle or st
eering wheel shak-
ing may also be noticed in this situa-
tion. These are normal characteristics
of Vehicle Dynamics Control operation
and are no cause for alarm. y When driving off immediately after
starting the engine, a short-lived oper-
ation noise may be noticed coming
from the engine compartment. This
noise is generated as a result of a
check being performed on the Vehicle
Dynamics Control system and is nor- mal.y Depending on the timing of activa-
tion of the brakes, certain situations
may occur just after driving off where
the brake pedal seems to exhibit a jolt-
ing motion. This too is a consequence
of the Vehicle Dynamics Control opera-
tional check and is normal.y In the circumstances listed in the fol-
lowing, the vehicle may be more unsta-
ble than it feels to the driver. The Vehi-
cle Dynamics Control System may
therefore operate. Such operation does
not indicate a system fault. yon gravel-covered or rutted roads
y on unfinished roads
y when the vehicle is towing a trailer
y when the vehicle is fitted with snow tires or winter tires
y Activation of the Vehicle Dynamics
Control system will cause operation of
the steering wheel to feel slightly dif-
ferent compared to that for normal con-
ditions. y Even if the vehicle is equipped with a
Vehicle Dynamics Control system, it is
important that winter tires be used
when driving on snow-covered or icy
roads. (All four wheels should be fitted
with tires of the same size and brand).
Furthermore, if snow chains are to be
used, they should be fitted on the front
wheels. When a vehicle is fitted with
snow chains, however, the effective-
ness of the Vehicle Dynamics Control
system is reduced and this should be
taken into account when driving the ve-
hicle in such a condition. y It is always important to reduce
speed when approaching a corner,
even if the vehicle is equipped with Ve-
hicle Dynamics Control. y All four wheels shou ld be fitted with
tires of the same size, type, and brand;
furthermore, the amount of wear
should be the same for all four tires. If
these precautions are not observed
and non-matching tires are used, it is
quite possible that the Vehicle Dynam-
ics Control system will be unable to op-
– Keep the tire pressure at the
proper level as shown on the
vehicle placard attached to the
driver’s side door pillar.