Subaru 2002 Impreza Service Manual page 77

CONTROL SYSTEM
Fuel Injection (Fuel System)
5 .
Control System
A: GENERAL
The ECM receives signals from various sensors, switches, and other control modules. Using these
signals, it determines the engine operating conditions and if necessary, emits signals to one or
more systems to control them for optimum operation.
Major control items of the ECM are as follow:
0
Fuel injection control
0
Ignition system control
0
Idle air control
0
Fuel pump control
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Canister purge control*l
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Radiator fan control*2
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On-board diagnosis function
*1: Canister purge control is described under "EC (DOHC TURBO) - Emission Control (Aux. Emis-
sion Control Devices) Evaporative Emission Control System".
*2: Radiator fan control is described under "CO
-
Cooling".
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