By-Pass Air Control - Subaru SVX 1992 Manual

2-7 IMS051 FUEL INJECTION SYSTEM
5. BY-PASS AIR CONTROL (IDLE SPEED CON-
TROL)
The ECU controls the operation of by-pass air control
solenoid valve and auxiliary air control valve based on
the signal from crank angle sensor 1, throttle sensor,
vehicle speed sensor 2, water temperature sensor,
ignition switch, A/C switch and inhibitor switch, etc.
When coolant temperature is cold, the amount of by-
pass air is controlled by auxiliary air control valve and
by-pass air control solenoid valve. When coolant tem-
perature is hot, it is controlled by only by-pass air
control solenoid valve.
Ignition switch
Crank angle sensor 1
Crank angle sensor 2
Cam angle sensor
Throttle sensor
Water temperature
sensor
Vehicle speed
sensor 2
A/C switch
Inhibitor switch
Throttle body
ECU
By-pass air control
solenoid valve
Auxiliary air
control valve
C2-178
Fig. 31
20