Subaru 2002 IMPREZA Service Manual page 232

GENERAL DESCRIPTION
I
ENGINE (DIAGNOSTICS)
ILLUSTRATION
The OBD-II diagnostics procedure is different
from the usual diagnostics procedure. When trou-
bleshooting OBD-ll vehicles, connect Subaru Se-
lect Monitor or the OBD-ll general scan tool to the
vehicle.
TEM
The Multipoint Fuel Injection (MFI) system is a
system that supplies the optimum air-fuel mixture
to the engine for all the various operating condi-
tions through the use of the latest electronic tech-
nology.
With this system fuel, which is pressurized at a con-
stant pressure, is injected into the intake air pas-
sage of the cylinder head. The injection quantity of
fuel is controlled by an intermittent injection system
where the electro-magnetic injection valve (fuel in-
jector) opens only for a short period of time, de-
D: PREPARATION TOOL
2. ENGINE AND EMISSION CONTROL SYS-
TOOL NUMBER
24082AA150
(Newly adopted tool)
82M3876
82M3877
22771 AA030
pending on the quantity of air required for one cycle
of operation. In actual operation, the injection quan-
tity is determined by the duration of an electric
pulse applied to the fuel injector and this permits
simple, yet highly precise metering of the fuel.
Further, all the operating conditions of the engine
are converted into electric signals, and this results
in additional features of the system, such as large
improved adaptability, easier addition of compen-
sating element, etc.
The MFI system also has the following features:
Reduced emission of harmful exhaust gases.
Reduced in fuel consumption.
Increased engine output.
Superior acceleration and deceleration.
Superior startability and warm-up perfor-
mance in cold weather since compensation is
made for coolant and intake air temperature.
DESCRIPTION
SARTRIDGE
SELECT MONITOR KIT
REMARKS
Troubleshooting for electrical
systems.
Troubleshooting for electrical
systems.
English: 22771AA030 (With-
out print er)
German: 22771 AA070
(Without printer)
French: 22771 AA080
(Without printer)
Spanish: 22771AA090
(Without printer)
EN(D0HC TURBO)-8