1995 SUBARU LEGACY air condition

9. Sight Glass Inspection
1. INSPECTION CONDITION
1) Operate the engine at approximately 1,500 rpm.
2) Open the door windows.
3) Set the fan switch to the 4th (High) position.
4) Set the mode selector switch to“A/C”position.
5) Set the temperature control switch to Full cold position.
6) Ensure that compressor discharge pressure is at least
588 kPa (6 kg/cm
2, 85 psi).
NOTE:
When discharge pressure does not reach 588 kPa (6
kg/cm
2, 85 psi) in areas where outside air temperature is
low, proceed as follows:
a. Set the TEMP. SWITCH to the Full hot position.
b. Set the temperature control switch to“MAX. A/C”posi-
tion.
c. Close the door windows completely.
d. Increase the compartment temperature so that dis-
charge pressure reaches at least 588 kPa (6 kg/cm
2,85
psi).
2. REFRIGERANT CHARGE AMOUNT CHECKING
Check the refrigerant charge amount using the following
table as a guide.
Item to check Adequate Insufficient Almost in refrigerant Too much refrigerant
State in sight glassCLEAR
Air bubbles sometimes
appear when engine
speed is increased or
decreased.
G4M0669
FOAMY or BUBBLY
Air bubbles always
appear.
G4M0670
FROSTY
Frost-like appears.
G4M0671
NO FOAM
No air bubbles appear.
G4M0672
Temperature of high
and low pressure linesHigh-pressure side is
hot while low-pressure
side is cold. (A big
temperature difference
between high and low
pressure side)High-pressure side is
warm and low-pressure
side is slightly cold.
(Not so big temperature
difference between high
and low pressure side)There is almost no
temperature difference
between high and low
pressure side.High-pressure side is
hot and low-pressure
side is slightly warm.
(Slight temperature
difference between high
and low pressure side)
Pressure of systemBoth pressures on high
and low pressure sides
are normal.Both pressures on high
and low pressure sides
are slightly low.High-pressure side is
abnormally low.Both pressures on high
and low pressure sides
are abnormally high.
54
4-7DIAGNOSTICS
9. Sight Glass Inspection

6. Coating Method for PP Bumper
1. PROCESS STEPS
Process
No.Process name Job contents
1 Bumper mountingSet bumper on paint work table if required. Use
paint work table conforming to inner shape of
bumper when possible.
G5M0164
2 MaskingMask specified part (black base) with masking tape. Use masking tape for PP (e.g., Nichiban No.
533, etc.).
3Degreasing, clean-
ingClean all parts to be painted with white gasoline, normal alcohol, etc. to remove dirt, oil, fat, etc.
4 Primer paint First, apply one coat of primer to all parts to be painted, using air gun. Use primer (clear).
5 DryingDry at normal temperature [10 to 15 min. at 20°C (68°F)].
In half-dried condition, PP primer paint is dissolved by solvent, e.g. thinner, etc.
Therefore, if dust or dirt must be removed, use ordinary alcohol, etc.
6 Top coat paint (I)Solid color Metallic color
Use section (block) paint for top coat.

Paint in use (for each color):
Solid paint
Hardener PB
Thinner T-301

Mixing ratio:
Main agent vs. hardener = 4:1

Viscosity: 10—13 sec/20°C (68°F)

Film thickness: 35—45µ

Spraying pressure: 245—343 kPa
(2.5—3.5 kg/cm
2,36—50 psi)Use section (block) paint for top coat.

Paint in use (for each color):
Metallic paint
Hardener PB
Thinner T-306

Mixing ratio:
Main agent vs. hardener = 10:1

Viscosity: 10—13 sec/20°C (68°F)

Film thickness: 15—20µ

Spraying pressure: 245—343 kPa
(2.5—3.5 kg/cm2,36—50 psi)
7 Drying Not required.Dry at normal temperature [10 min. or more at
20°C (68°F)].
In half-dried condition, avoid dust, dirt.
8 Top coat paint (II) Not required.Apply a clear coat to parts with top coat paint (I),
three times, at 5—7 minutes intervals.

Paint in use:
Metallic paint
Hardener PB
Thinner T-301

Mixing ratio: Clear vs. hardener = 6:1

Viscosity: 14—16 sec/20°C (68°F)

Film thickness: 25—30µ

Spraying pressure: 245—343 kPa
(2.5—3.5 kg/cm
2,36—50 psi)
9 Drying60°C (140°F), 60 min. or 80°C (176°F), 30 min.
If higher than 80°C (176°F), PP may be deformed. Keep maximum temperature of 80°C (176°F).
10 Inspection Paint check
11 Masking removal Remove masking in process No. 2.
40
5-1SERVICE PROCEDURE
6. Coating Method for PP Bumper

7. Repair Instructions for Colored PP
Bumper
All PP bumpers are provided with a grained surface, and if
the surface is damaged, it cannot normally be restored to
its former condition. Damage limited to shallow scratches
that cause only a change in the lustre of the base material
or coating, can be almost fully restored. Before repairing a
damaged area, explain this point to the customer and get
an understanding about the matter.
Repair methods are outlined below, based on a classifica-
tion of the extent of damage.
1. MINOR DAMAGE CAUSING ONLY A CHANGE IN
THE LUSTRE OF THE BUMPER DUE TO A LIGHT
TOUCH
It is almost restorable as follows:
Process
No.Process name Job contents
1 Cleaning Clean the area to be repaired using water.
2 Sanding Grind the repairing area with #500 sand paper in a“feathering”motion.
3 FinishResin section Coated section
Repeatedly apply wax to the affected area using
a soft cloth (such as flannel).
Recommended wax: NITTO KASEI Soft 99 TIRE
WAX BLACK, or equivalent.Perform either the same operation as for the
resin section or process No. 18 and subsequent
operations in the“3.”section, depending on the
degree and nature of damage.
Polish the waxed area with a clean cloth after 5
to 10 minutes.
2. DEEP DAMAGE CAUSED BY SCRATCHING
FENCES, ETC.
A dent cannot be repaired but a whitened or swelled part
can be removed.
Process
No.Process name Job contents
1 Cleaning Clean damaged area with water.
2Removal of dam-
aged areaCut off protruding area, if any, due to collision, using a putty knife.
3 Sanding Grind the affected area with #100 to #500 sand paper.
4 FinishResin section Coated section
Same as process No. 3 in the“1.”section.Perform process No. 12 and subsequent opera-
tions in the“3.”section.
41
5-1SERVICE PROCEDURE
7. Repair Instructions for Colored PP Bumper

Process
No.Process name Job contents
18 Cleaning/degreasing Same as process No. 12.
19 Top coat (I)Solid color Metallic color
Use a“block”coating method.

Recommended paint:
Suncryl (SC)
No. 307 Flex hardener
SC reducer (thinner)

Mixing ratio:3:1
Suncryl (SC) vs. No. 307 Flex hardener

Viscosity: 11—13 sec/20°C (68°F)

Coated film thickness: 40—50µ

Spraying thickness: 245—343 kPa
(2.5—3.5 kg/cm
2,36—50 psi)Use a“block”coating method.

Recommended paint:
Suncryl (SC)
No. 307 Flex hardener
SC Reducer (thinner)

Mixing ratio:3:1
Suncryl (SC) vs. No. 307 Flex Hardener

Viscosity: 11—13 sec/20°C (68°F)

Coated film thickness: 20—30µ

Spraying thickness: 245—343 kPa
(2.5—3.5 kg/cm2,36—50 psi)
20 Leave unattended. Not required.Leave unattended at 20°C (68°F) for at least 10
minutes until the top coated area is half-dry.
NOTE:
Be careful to keep dust or dirt from coming in
contact with the affected area.
21 Top coat (II) Not required.Apply a clear coat three times at an interval of 3
to 5 minutes.

Recommended paint:
SC710 Overlay clear
No. 307 Flex hardener
SC reducer (thinner)

Mixing ratio:3:1
Suncryl (SC) vs. No. 307 Flex hardener

Viscosity: 10—13 sec/20°C (68°F)

Coated film thickness: 20—30µ

Spraying pressure: 245—343 kPa
(2.5—3.5 kg/cm
2,36—50 psi)
22 DryingAllow the coated surface to dry at 20°C (68°F) for two hours or 60°C (140°F) for 30 minutes.
NOTE:
Do not allow the temperature to exceed 80°C (176°F) since this will deform the PP substrate.
23 Inspection Carefully check the condition of the repaired area.
24 Masking removal Remove masking tape applied in process No. 11 and 13.
25 Parts installation Install parts on bumper in reverse order of removal.
26 Bumper installation Install bumper.
44
5-1SERVICE PROCEDURE
7. Repair Instructions for Colored PP Bumper

When storing a removed airbag module (driver side
and passenger side), be sure to place it in parallel with
floor with the pad facing up. Do not place it against a
wall, or place anything on the pad; otherwise, a dan-
gerous condition may be created if the module mal-
functions.
G5M0604
11
5-5SERVICE PROCEDURE
3. Airbag Module

G6M0088
2) Carbon fouled
Dry fluffy carbon deposits on insulator and electrode are
mostly caused by slow speed driving in city, weak ignition,
too rich fuel mixture, dirty air cleaner, etc.
It is advisable to replace with plugs having hotter heat
range.
G6M0089
3) Oil fouled
Wet black deposits show excessive oil entrance into com-
bustion chamber through worn rings and pistons or exces-
sive clearance between valve guides and stems. If same
condition remains after repair, use a hotter plug.
G6M0090
4) Overheating
White or light gray insulator with black or gray brown spots
and bluish burnt electrodes indicate engine overheating.
Moreover, the appearance results from incorrect ignition
timing, loose spark plugs, wrong selection of fuel, hotter
range plug, etc. It is advisable to replace with plugs having
colder heat range.
G6M0091
C: CLEANING AND REGAPPING
Clean spark plugs in a sand blast type cleaner.
Avoid excessive blasting. Clean and remove carbon or
oxide deposits, but do not wear away porcelain.
If deposits are too stubborn, discard plugs.
After cleaning spark plugs, recondition firing surface of
electrodes with file. Then correct the spark plug gap using
a gap gauge.
Spark plug gap: L
1.0—1.1 mm (0.039—0.043 in)
B6M0160
4. Ignition Coil
A: REMOVAL AND INSTALLATION
1) Disconnect battery ground cable.
2) Disconnect connector from ignition coil.
3) Remove ignition coil.
4) Installation is in the reverse order of removal.
CAUTION:
Be sure to connect wires to their proper positions.
Failure to do so will damage unit.
23
6-1SERVICE PROCEDURE
3. Spark Plug - 4. Ignition Coil

G6M0088
2) Carbon fouled
Dry fluffy carbon deposits on insulator and electrode are
mostly caused by slow speed driving in city, weak ignition,
too rich fuel mixture, dirty air cleaner, etc.
It is advisable to replace with plugs having hotter heat
range.
G6M0089
3) Oil fouled
Wet black deposits show excessive oil entrance into com-
bustion chamber through worn rings and pistons or exces-
sive clearance between valve guides and stems. If same
condition remains after repair, use a hotter plug.
G6M0090
4) Overheating
White or light gray insulator with black or gray brown spots
and bluish burnt electrodes indicate engine overheating.
Moreover, the appearance results from incorrect ignition
timing, loose spark plugs, wrong selection of fuel, hotter
range plug, etc. It is advisable to replace with plugs having
colder heat range.
G6M0091
C: CLEANING AND REGAPPING
Clean spark plugs in a sand blast type cleaner.
Avoid excessive blasting. Clean and remove carbon or
oxide deposits, but do not wear away porcelain.
If deposits are too stubborn, discard plugs.
After cleaning spark plugs, recondition firing surface of
electrodes with file. Then correct the spark plug gap using
a gap gauge.
Spark plug gap: L
1.0—1.1 mm (0.039—0.043 in)
B6M0160
4. Ignition Coil
A: REMOVAL AND INSTALLATION
1) Disconnect battery ground cable.
2) Disconnect connector from ignition coil.
3) Remove ignition coil.
4) Installation is in the reverse order of removal.
CAUTION:
Be sure to connect wires to their proper positions.
Failure to do so will damage unit.
23
6-1SERVICE PROCEDURE
3. Spark Plug - 4. Ignition Coil

1. General
1. GENERAL DESCRIPTION

The on-board diagnostics (OBD) system detects and
indicates a fault in various inputs and outputs of the com-
plex electronic control. CHECK ENGINE malfunction indi-
cator lamp (MIL) in the combination meter indicates occur-
rence of a fault or trouble.

Further, against such a failure or sensors as may disable
the drive, the fail-safe function is provided to ensure the
minimal driveability.

The OBD system incorporated with the vehicles within
this engine family complies with Section 1968.1, California
Code of Regulations (OBD-II regulation). The OBD system
monitors the components and the system malfunction
listed in Engine Section which affects on emissions.

When the system decides that a malfunction occurs, MIL
illuminates. At the same time of the MIL illumination or
blinking, a diagnostic trouble code (DTC) and a freeze
frame engine conditions are stored into on-board com-
puter.

The OBD system stores freeze frame engine condition
data (engine load, engine coolant temperature, fuel trim,
engine speed and vehicle speed, etc.) into on-board com-
puter when it detects a malfunction first.

If the OBD system detects the various malfunctions
including the fault of fuel trim or misfire, the OBD system
first stores freeze frame engine conditions about the fuel
trim or misfire.

When the malfunction does not occur again for three
trips, MIL is turned off, but DTC remains at on-board com-
puter.

The OBD-II system is capable of communication with a
general scan tool (OBD-II general scan tool) formed by ISO
9141 CARB.

The OBD-II diagnostics procedure is different from the
usual diagnostics procedure. When troubleshooting OBD-II
vehicles, connect Subaru select monitor or the OBD-II gen-
eral scan tool to the vehicle.
A: ENGINE
1. ENGINE AND EMISSION CONTROL SYSTEM

The Multipoint Fuel Injection (MFI) system is a system
that supplies the optimum air-fuel mixture to the engine for
all the various operating conditions through the use of the
latest electronic technology.
With this system fuel, which is pressurized at a constant
pressure, is injected into the intake air passage of the cyl-
inder head. The injection quantity 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 quan-
2
2-7ON-BOARD DIAGNOSTICS II SYSTEM
1. General