2004 SUBARU IMPREZA engine

3-11
Instruments and controls
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the ambient temperature and driving conditions.
We recommend that you drive moderately until the
pointer of the temperature gauge reaches near the
middle of the range. Engine operation is optimum with
the engine coolant at this temperature range and high
revving operation when the engine is not warmed up
enough should be avoided.
If the pointer exceeds the normal operating
range, safely stop the vehicle as soon as possi-
ble.
See the “In case of emergency” in chapter 9. !
Ambient temperature gauge
A) U.S. spec. models
B) Canada spec. models
The ambient temperature gauge shows the ambient
temperature in a range from −22 °F to 122 °F ( −30 °C to
50 °C).
The gauge can give a false reading under any of the
following conditions:" When there is too much sun.
" During idling; while running at low speeds in a traffic
jam; when the engine is restarted immediately follow-
ing a shutdown.
A
B
UG3028AB

3-12
Instruments and controls
"
When the actual ambient temperature falls outside
the specified gauge range. REV indicator light and buzzer (WRX-
STi)
The REV alarm system issues a warning using the
REV indicator light (and a buzzer if additionally select-
ed) when the engine speed reaches a level previously
set using the REV setting knob.
If you press the trip knob when the ignition switch is in
the “LOCK” position, the ambient temperature gauge
will show the engine speed that has already been set.
NOTE
Even if the REV alarm system is not set, the REV
indicator light will come on whenever the engine
UG3522BA

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Instruments and controls
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speed enters the tachometer’s red zone. !Setting the alarm-level engine speed
1. Turn the REV setting knob clockwise or counter-
clockwise, then release it and let it return to its initial
position. The buzzer will sound. The REV alarm sys-
tem is now ready to be set.
2. Turn the REV setting knob to select the desired
alarm-level engine speed.
At this time, the ambient temperature gauge will show
the engine-speed setting. "Counterclockwise ( −) for less than 0.5 second:
Speed setting changes downward by 100 rpm. "
Clockwise (+) for less than 0.5 second: Speed
setting changes upward by 100 rpm." Counterclockwise ( −) for 0.5 second or longer:
Speed setting changes downward by 1,000 rpm. " Clockwise (+) for 0.5 second or longer: Speed
setting changes upward by 1,000 rpm.
The speed setting will stop changing if it reaches 0
rpm or the maximum engine speed.

The alarm-level engine speed can be set (in 100 rpm
steps) within a range from 2000 rpm to 7500 rpm.
The indicator shows the setting as follows:
Approximately three seconds after you stop turning
the knob, the REV alarm system will automatically en-
ter its next setting mode (step 3 below), in which you
can enable or disable the buzzer.
3. Enable or disable the buzzer as desired using the REV setting knob. "Turn the knob clockwise (+) to enable the buzzer.
The indicator will show “ON”, and the buzzer will
sound three times. With the buzzer enabled, en-
UG3036AA
Speed (rpm) 0 2000 2100 ∼7400 7500
Indication 00 20 21 ∼74 75

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Instruments and controls
gine-speed warnings are given by both the REV in-
dicator light and the buzzer. "
Turn the knob counterclockwise ( −) to disable the
buzzer. The indicator will show “– –”, and the buzzer
will not sound. With the buzzer disabled, engine-
speed warnings are given only by the REV indicator
light.
Approximately three seconds after you stop turning
the knob, the buzzer will sound once to indicate the
end of the setting procedure. The indicator will return
to showing the ambient temperature.
Also, the tachometer needle will return to approxi- mately “0”.
NOTE " The REV alarm system does not operate while
settings are being entered. " The speed-setting mode terminates if 0 rpm is
selected." The speed-setting mode is canceled if the igni-
tion switch is turned to OFF or the vehicle starts
moving before the setting procedure is finished. " Speed setting is impossible when the vehicle is
moving. " The set engine speed may differ from the engine
speed shown by the tachometer. Use the engine
speed shown by the tachometer as a rough guide. !
Deactivating the REV alarm system
To deactivate the REV alarm system’s REV indicator
light and buzzer functions, set the alarm-level engine
speed to 0 (zero) rpm.

3-16
Instruments and controls
To set the trip meter to zero, select the A trip or B trip
meter by pushing the knob and keep the knob pushed
for more than 2 seconds.
To ensure safety, do not attempt to change the
function of the indicator during driving, as an
accident could result.
NOTE
If the connection between the combination meter
and battery is broken for any reason such as vehi-
cle maintenance or fuse replacement, the data re-
corded on the trip meter will be lost. !
Tachometer
The tachometer shows the engine speed in thousands
of revolutions per minute.
Do not operate the engine with the pointer of
the tachometer in the red zone. In this range, fuel injection will be cut by the engine control
module to protect the engine from overrevving.
The engine will resume running normally after
the engine speed is reduced below the red
zone.
! Fuel gauge
1) Low fuel warning light
The fuel gauge shows the approximate amount of fuel
remaining in the tank.
The gauge does not return to “E” even though the ig-
nition switch is in the “ACC” or “LOCK” position.
A trip meter B trip meter
1
UG3501BB

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Instruments and controls
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The gauge may move slightly during braking, turning
or acceleration due to fuel level movement in the tank.
NOTE
You will see the “FUEL DOOR ” sign near the
fuel gauge.
This indicates that the fuel filler door (lid) is locat-
ed on the right side of the vehicle. !Low fuel warning light
The low fuel warning light comes on when the tank is
nearly empty [about 2.3 U.S. gal. (9.0 liters, 1.9 Imp.
gal.]. It only operates when the ignition switch is in the
“ON” position.
NOTE
This light does not go out unless the tank is re-
plenished up to an internal fuel quantity of about
4.0 U.S. gal. (15 liters, 3.3 Imp. gal.). ! Temperature gauge
1) Normal operating range
The temperature gauge shows engine coolant temper-
ature when the ignition switch is in the “ON” position.
The coolant temperature will vary in accordance with
the ambient temperature and driving conditions.
HS3023AA
1
UG3502BB

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Instruments and controls
We recommend that you drive moderately until the
pointer of the temperature gauge reaches near the
middle of the range. Engine operation is optimum with
the engine coolant at this temperature range and high
revving operation when the engine is not warmed up
enough should be avoided.
If the pointer exceeds the normal operating
range, safely stop the vehicle as soon as possi-
ble.
See “In case of emergency” in chapter 9.
!
Ambient temperature gauge (if
equipped)
A) U.S. spec. models
B) Canada spec. models
The ambient temperature gauge shows the ambient
temperature in a range from −22 °F to 122 °F ( −30 °C to
50 °C).
The gauge can give a false reading under any of the
following conditions:" When there is too much sun.
" During idling; while running at low speeds in a traffic
jam; when the engine is restarted immediately follow-
A
B
UG3029AB

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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