Control System; Input And Output Signals - Subaru SVX 1992 Manual

FUEL INJECTION SYSTEM
[M602] 2-7
6 . Control System
1 . GENERAL
The ECU receives signals sent from various sensors and
switches to judge the engine operating condition and
emits output signals to provide the optimum control
and/or functioning of various systems .
Major items governed by the ECU are as follow :
2. INPUT AND OUTPUT SIGNALS
Fuel injection control
Ignition system control
By-pass air control
EGR control
Canister purge control
Radiator fan control
Engine torque control
Air conditioner cut control
Self-diagnosis function
Unit Function
Air flow sensor
Detects amount of intake air .
Throttle sensor
Detects throttle position .
OZ sensor 1
OZ sensor 2
Detects the density of OZ in exhaust gases .
Crank angle sensor 1
Detects engine speed .
Crank angle sensor 2
Cam angle sensor
Detects the relative cylinder position .
I t i l
Water temperature sensor Detects coolant temperature .
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Knock sensor 1
Knock sensor 2
Detects engine knocking for all cylinders .
Vehicle speed sensor Detects vehicle speed .
Atmospheric pressure sensor
Detects atmospheric pressure .
Ignition switch Detects ignition switch operation .
Starter switch Detects the condition of engine cranking .
Inhibitor switch
Detects shift position .
A/C switch
Detects ON-OFF operation of A/C switch.
Fuel injector Inject fuel .
Ignition signal Turn primary ignition current ON or OFF .
Fuel pump relay Turn fuel pump relay ON or OFF .
A/C control relay Turn A/C control relay ON or OFF .
O i l
Radiator fan control relay Turns radiator fan control relay ON or OFF .
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Induction control solenoid valve Controls Induction control valve .
By-pass air control solenoid valve Adjusts amount of by-pass air through throttle valve .
EGR solenoid valve
Controls EGR valve .
Purge control solenoid valve Controls canister purge control solenoid valve.
( HECK ENGINE light Indicates trouble .
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