Subaru Legacy 2001 Service Manual page 10

Engine (DIAGNOSTICS)
Select Monitor or the OBD-II general scan tool to
the vehicle.
2. ENGINE AND EMISSION CONTROL
SYSTEM
S048001A1502
¼ 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
constant pressure, is injected into the intake air
passage of the cylinder head. The injection quan-
tity of fuel is controlled by an intermittent injection
system where the electro-magnetic injection valve
(fuel injector) opens only for a short period of time,
depending on the quantity of air required for one
cycle of operation. In actual operation, the injection
quantity is determined by the duration of an elec-
tric pulse applied to the fuel injector and this per-
mits simple, yet highly precise metering of the fuel.
¼ 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 com-
pensating element, etc.
The MFI system also has the following features:
D: PREPARATION TOOL
ILLUSTRATION
B2M3876
B2M3877
GENERAL DESCRIPTION
S048001A17
TOOL NUMBER DESCRIPTION
24082AA150 CARTRIDGE
(Newly adopted tool)
22771AA030 SELECT MONITOR
KIT
EN(H6)-8
¼ Reduced emission of harmful exhaust gases.
¼ Reduced in fuel consumption.
¼ Increased engine output.
¼ Superior acceleration and deceleration.
¼ Superior startability and warm-up perfor-
mance in cold weather since compensation is
made for coolant and intake air temperature.
3. AUTOMATIC TRANSMISSION AND
ELECTRONIC-HYDRAULIC CONTROL
SYSTEM
S048001A1503
The electronic-hydraulic control system consists of
various sensors and switches, a transmission con-
trol module (TCM) and the hydraulic controller
including solenoid valves. The system controls the
transmission proper including shift control, lock-up
control, overrunning clutch control, line pressure
control and shift timing control. It also controls the
AWD transfer clutch. In other words, the system
detects various operating conditions from various
input signals and sends output signals to shift sole-
noids 1, 2 and low clutch timing solenoid and 2-4
brake timing solenoid, line pressure duty solenoid,
lock-up duty solenoid, transfer duty solenoid and
2-4 brake duty solenoid (a total of eight solenoids).
Troubleshooting for electrical systems.
Troubleshooting for electrical systems.
¼ English: 22771AA030 (Without printer)
¼ German: 22771AA070 (Without printer)
¼ French: 22771AA080 (Without printer)
¼ Spanish: 22771AA090 (Without printer)
REMARKS