2004 SUBARU IMPREZA WRX check engine light

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CONTINUED –
!Warning and indicator light
Mark Name Page
Seatbelt warning light 3-19
SRS airbag system warning light 3-20
CHECK ENGINE warning light/
Malfunction indicator lamp 3-20
Charge warning light 3-21
Oil pressure warning light 3-21
AT OIL temperature warning light (if equipped) 3-22
or ABS warning light 3-23
or Brake system warning light 3-24
Door open warning light 3-25
Front-wheel drive warning light
(if equipped) 3-25
Turn signal indicator lights 3-26
High beam indicator light 3-26
Security system indicator light (if equipped) 2-14
Intercooler water spray warn-
ing light (if equipped) 3-25
Light indicator light (if equipped) 3-27
Cruise control indicator light (if equipped) 3-26
Cruise control set indicator light 3-26
REV indicator light (if equipped) 3-27
Rear differential oil tempera-
ture warning light (if equipped) 3-22
Electronic driver’s control cen-
ter differential auto indicator (if equipped) 3-26
Mark Name Page

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3
Instruments and controls
Ignition switch .............................................. 3-3 LOCK .................................................................. 3-3
ACC .................................................................... 3-4
ON ....................................................................... 3-4
START ................................................................ 3-4
Key reminder chime .......................................... 3-4
Ignition switch light (if equipped) .................... 3-5
Key interlock release (AT vehicles only) ........ 3-5
Hazard warning flasher ................................ 3-6
Meters and gauges (WRX-STi) .................... 3-7 Combination meter illumination ...................... 3-7
Cancelling sequential illumination of the combination meter ......................................... 3-7
Speedometer ..................................................... 3-7
Odometer/Trip meter ........................................ 3-8
Tachometer ........................................................ 3-9
Fuel gauge ......................................................... 3-9
Temperature gauge ........................................... 3-10
Ambient temperature gauge ............................ 3-11
REV indicator light and buzzer (WRX-STi) . 3-12 Setting the alarm-level engine speed .............. 3-13
Deactivating the REV alarm system ................ 3-14
Meters and gauges (Except WRX-STi) ........ 3-15 Speedometer ..................................................... 3-15
Odometer/Trip meter ........................................ 3-15
Tachometer ........................................................ 3-16
Fuel gauge ......................................................... 3-16
Temperature gauge ........................................... 3-17
Ambient temperature gauge (if equipped) ...... 3-18
Warning and indicator lights ....................... 3-19 Seatbelt warning light and chime .................... 3-19 SRS airbag system warning light .................... 3-20
CHECK ENGINE warning light/Malfunction
indicator lamp ................................................. 3-20
Charge warning light ........................................ 3-21
Oil pressure warning light ............................... 3-21
AT OIL TEMPerature warning light (for AT vehicles) ............................................. 3-22
Rear differential oil temperature warning light
(WRX-STi) ........................................................ 3-22
ABS warning light ............................................. 3-23
Brake system warning light ............................. 3-24
Door open warning lights ................................ 3-25
Front-wheel drive warning light (for AT vehicles – if equipped) ...................... 3-25
Intercooler water spray warning light
(WRX-STi) ........................................................ 3-25
Selector lever position indicator (AT vehicles) 3-26
Turn signal indicator lights .............................. 3-26
High beam indicator light ................................. 3-26
Cruise control indicator light ........................... 3-26
Cruise control set indicator light .................... 3-26
Driver’s control center differential auto indicator light (WRX-STi) ............................... 3-26
Driver’s control center differential indicator
lights (WRX-STi) ............................................. 3-27
Headlight indicator light (WRX-STi) ................ 3-27
REV indicator light (WRX-STi) ......................... 3-27
Clock .............................................................. 3-28
Light control switch ...................................... 3-29 Headlights ......................................................... 3-29
High/low beam change (dimmer) .................... 3-30
Headlight flasher ............................................... 3-30

3-19
Instruments and controls
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ing a shutdown. "When the actual ambient temperature falls outside
the specified indicator range.Warning and indicator lights
Several of the warning and indicator lights come on
momentarily and then go out when the ignition switch
is initially turned to the “ON” position. This permits
checking the operation of the bulbs.
Apply the parking brake and turn the ignition switch to
the “ON” position. The following lights come on:
Seatbelt warning light
SRS airbag system warning light
CHECK ENGINE warning light/Malfunction indica- tor lamp
Charge warning light
Oil pressure warning light
AT OIL temperature warning light (AT vehicles)ABS warning light
Brake system warning light
If any lights fail to come on, it indicates a burned-out
bulb or a malfunction of the corresponding system.
Consult your authorized SUBARU dealer for repair. ! Seatbelt warning light and chime
When the ignition switch is turned to the “ON” position,
the seatbelt warning light will come on and the remind-
er chime will sound for about six seconds to remind the

3-20
Instruments and controls
driver to fasten the seatbelt.
The seatbelt warning light remains on for about six
seconds and turns off automatically after six seconds.
The seatbelt reminder chime will turn off when the
driver’s side seatbelt is buckled or it will turn off auto-
matically after six seconds. !
SRS airbag system warning light
When the ignition switch is turned to the “ON” position,
the SRS airbag system warning light will come on for
about six seconds and go out. This shows the SRS air-
bag and SRS side airbag (if equipped) and seatbelt
pretensioners are in normal operation.
If this light comes on while driving or remains illuminat-
ed even after a period of about 6 seconds from when
the ignition has been turned on, it may indicate that the
SRS airbag system or SRS side airbag system (if
equipped) or seatbelt pretensioner system is not work-
ing properly. Contact your nearest SUBARU dealer
immediately. !
CHECK ENGINE warning light/
Malfunction indicator lamp
If the CHECK ENGINE light comes on while you
are driving, have your vehicle checked/repaired
by your SUBARU dealer as soon as possible.
Continued vehicle operation without having the
emission control system checked and repaired
as necessary could cause serious damage,
which may not be covered by your vehicle’s
warranty.
If this light comes on steadily or blinks while the engine
is running, it may indicate that there is a problem or po-
tential problem somewhere in the emission controlsystem. ! If the light comes on steadily:
If the light comes on steadily while driving or does not
go out after the engine starts, an emission control sys-
tem malfunction has been detected.
You should have your vehicle checked by an autho-
rized SUBARU dealer immediately.

3-21
Instruments and controls
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NOTE
This light also comes on when the fuel filler cap is
not tightened until it clicks.
If you have recently refueled your vehicle, the cause of
the CHECK ENGINE warning light/malfunction indica-
tor lamp coming on could be a loose or missing fuel fill-
er cap. Remove the cap and retighten it until it clicks.
Make sure nothing is interfering with the sealing of the
cap. Tightening the cap will not make the CHECK EN-
GINE warning light turn off immediately. It may take
several driving trips. If the light does not go out, take
your vehicle to your authorized SUBARU dealer im-
mediately. !If the light is blinking:
If the light is blinking while driving, an engine misfire
condition has been detected which may damage the
emission control system.
To prevent serious damage to the emission control
system, you should do the following: "Reduce vehicle speed.
" Avoid hard acceleration.
" Avoid steep uphill grades.
" Reduce the amount of cargo, if possible.
" Stop towing a trailer as soon as possible.
The CHECK ENGINE warning light may stop blinking and come on steadily after several driving trips. You
should have your vehicle checked by an authorized
SUBARU dealer immediately. !
Charge warning light
If this light comes on when the engine is running, it
may indicate that the charging system is not working
properly.
If the light comes on while driving or does not go out
after the engine starts, stop the engine at the first safe
opportunity and check the alternator belt. If the belt is
loose, broken or if the belt is in good condition but the
light remains on, contact your nearest SUBARU deal-
er immediately. ! Oil pressure warning light
If this light comes on when the engine is running, it
may indicate that the engine oil pressure is low and the
lubricating system is not working properly.
If the light comes on while driving or does not go out
after the engine starts, stop the engine at the first safe
opportunity and check the engine oil level. If the oil lev-
el is low, add oil immediately. If the engine oil is at the
proper level but the light remains on, contact your
nearest SUBARU dealer immediately.

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Instruments and controls
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. !
Brake system warning light
"Driving 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." 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.
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 res-
ervoir 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 released and with
the ignition switch positioned in “ON”), it could be an
indication of leaking of brake fluid or worn brake pads.
If this occurs, immediately stop the vehicle at the near-
est safe place and check the brake fluid level. If the flu-
id level is below the “MIN” mark in the reservoir, do not
drive the vehicle. Have the vehicle towed to the near-
est SUBARU dealer for repair. ! Electronic Brake Force Distribution (EBD) sys-
tem warning (for vehicles with ABS)
The brake system warning light also illuminates if a
malfunction occurs in the EBD system. In that event, it
comes on together with the ABS warning light.
The EBD system may be malfunctioning if the brake
system warning light and ABS warning light illuminate
simultaneously during driving.
Even if the EBD system fails, the conventional braking
system will still function. However, the rear wheels will
be more prone to locking when the brakes are applied
harder than usual and the vehicle’s motion may there-
(U.S.) (Canada)

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Instruments and controls
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fore 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 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. !Door open warning lights
The door open warning light comes on if any door or
the rear gate is not fully closed.
Always make sure this light is out before you start to drive. !
Front-wheel drive warning light
(for AT vehicles – if equipped)
This light comes on when All Wheel Drive is disen-
gaged and the drive mechanism is switched to Front
Wheel Drive for maintenance or similar purposes. ! Intercooler water spray warning
light (WRX-STi)
This light comes on when the water level in the inter-
cooler water spray tank falls to the lower limit (about
0.4 U.S. qt, 0.4 liter, 0.4 Imp qt.).

4-1
4
Climate control
Ventilator ....................................................... 4-2 Air flow selection .............................................. 4-2
Center and side ventilators .............................. 4-3
Manual climate control system (if equipped) 4-4 Control panel ..................................................... 4-4
Heater operation ............................................... 4-6
Air conditioner operation (if equipped) .......... 4-9
Semi-automatic climate control system (if equipped) ............................................... 4-11Control panel ..................................................... 4-11
Operating method ............................................. 4-14
Temperature sensors ....................................... 4-18
Operating tips for heater and air conditioner 4-19 Cleaning ventilation grille ................................ 4-19
Efficient cooling after parking in direct sunlight ........................................................... 4-19
Lubrication oil circulation in the refrigerant
circuit .............................................................. 4-19
Checking air conditioning system before summer season .............................................. 4-19
Cooling and dehumidifying in high humidity and low temperature weather conditions .... 4-20
Air conditioner compressor shut-off when
engine is heavily loaded ................................ 4-20
Refrigerant for your climate control system .. 4-20
Air filtration system (if equipped) ................ 4-20 Replacing an air filter ....................................... 4-21