Subaru 2002 Impreza Service Manual page 79

CONTROL SYSTEM
Fuel Injection (Fuel System)
Fuel Injector
lanition signal
Signal
Activates an injector.
Turns the primary ignition current ON or OFF.
3utput signals
Fuel pump controller
A/C control relay
Radiator fan control relay
Controls the fuel pump.
Turns the A/C control relay ON or OFF.
Turns the radiator fan control relay ON or OFF.
Adjusts the amount of air flowing through the bypass line in the
throttle body.
Idle air control solenoid valve
Tumble generator valve actuator
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Operates the tumble generator valve.
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Wastegate control solenoid valve
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Controls supercharging pressure.
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Malfunction indicator lamp
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Indicates existence of abnormality.
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Purge control solenoid valve
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Controls purge of evaporative gas absorbed by the canister.
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Pressure control solenoid valve
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Controls evaporation gas pressure in the fuel tank.
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Drain valve
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Close the evaporation line between the fuel tank and canister to de-
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tect leakage of evaporation gases.
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Power
SUDD~V
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Controls ON/OFF of the main Dower
SUDP~Y
relay.
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FU-29