Control System - Subaru LEGACY 2002 Quick Reference Index

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:
Fuel injection control
!
! Ignition system control
! Idle air control
! Canister purge control*
Radiator fan control*
!
! Fuel pump control
! On-board diagnosis function
*1: Canister purge control is described under "EC (w/o OBD) – Emission Control (Aux. Emission
Control Devices) Evaporative Emission Control System".
*2: Radiator fan control is described under "CO – Cooling".
CONTROL SYSTEM
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FU-25
Fuel Injection (Fuel System)