1995 SUBARU LEGACY check engine light

G4M0612
4. LEAK TEST — HIGH-PRESSURE SIDE
Operate the A/C system for approx. 10 minutes, then turn
the engine off and begin the leak test.
1) Begin at the connection of the high-pressure tube to the
evaporator, and work your way along the high- pressure
side of the system to the compressor. There are three
places to check on each tube connection.
2) Check the area.
(1) Check the area where the fitting joins the tube.
G4M0613
(2) Check the area where the two parts of the fitting
join each other.
G4M0614
(3) Check the area where the nut joins the tube.
3) Check the area of the sight glass and pressure switch
(dual switch), and also check the seams of the receiver
drier.
4) Check the connections of the tubes to the condenser,
and also check any welded joints on the condenser.
CAUTION:
An oily area on the fins of the condenser may indicate
a leak.
5) Check the area where the hoses attach to the compres-
sor.
6) Check around the machined portions of the compressor
(where the compressor sections join each other).
7) If equipped, check the thermal limiter on the compres-
sor housing.
8) Check the compressor shaft seal by probing near the
center of the compressor clutch pulley.
NOTE:
Some shaft seals have a very slight amount of normal
leakage [approximately 28 g (1.0 oz) per year].
24
4-7SERVICE PROCEDURE
8. Leak Testing

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

3. Spark Plug
A: REMOVAL AND INSTALLATION
CAUTION:
All spark plugs installed on an engine, must be of the
same heat range.
Spark plug:
CHAMPION: RC10YC4
(Alternate)
NGK: BKR6E-11
NIPPONDENSO: K20PR-U11
1) Remove spark plug cords by pulling boot, not cord itself.
2) Remove spark plugs.
3) When installing spark plugs on cylinder head, use spark
plug wrench.
Tightening torque (Spark plug):
20.6±2.9 N⋅m (2.10±0.30 kg-m, 15.19±2.14 ft-lb)
CAUTION:
The above torque should be only applied to new spark
plugs without oil on their threads.
In case their threads are lubricated, the torque should
be reduced by approximately 1/3 of the specified
torque in order to avoid their over-stressing.
4) Connect spark plug cords.
G6M0086
B: INSPECTION
Check electrodes and inner and outer porcelain of plugs,
noting the type of deposits and the degree of electrode
erosion.
G6M0087
1) Normal
Brown to grayish-tan deposits and slight electrode wear
indicate correct spark plug heat range.
22
6-1SERVICE PROCEDURE
3. Spark Plug

2. Generator
Turn ignition switch ON
(engine OFF).
Check if charge bulb
comes on.
YES
NO
Disconnect generator
body harness
connector.
Turn ignition switch to
“START.”(engine starts.)Check if charge bulb
comes on when terminal
(L) of body harness
connector is grounded.
YES
NO
Replace charge bulb.
Check IC regulator.
Check positive terminal
of diode.
Check if charge bulb is
OFF while engine idles.
NO
YES (Remains ON or blinks.)
Check or replace fan belt.
Check generator.
Check S or BAT terminal for improper
contact.
Measure VB* of battery
while running engine at
1,500 rpm.15.5 V is less than VB.
Replace IC regulator
assembly.
VB is less
than 12.5 V.12.5 V is less than or equal to VB, and
VB is less than or equal to 15.5 V.
Check IC regulator as a
single unit.
Turn light switch ON
while engine idles.Check if charge bulb
comes on.
YES
NO
No problems
Check diode assembly.
*: Terminal voltage







26
6-1DIAGNOSTICS
2. Generator

1. Body Electrical
A: SPECIFICATIONS
BatteryReserve capacity 82 minutes (MT), 100 minutes (AT)
Cold cranking ampere 430 amperes (MT), 490 amperes (AT)
Fuse10 A, 15 A, 20 A
Combination
meterSpeedometer Electric pulse type
Tachometer Electric impulse type
Water temperature gauge Thermistor cross coil type
Fuel gauge Resistance cross coil type
Charge indicator light 12 V—1.4 W
Brake fluid level warning/parking brake indicator light 12 V—1.4 W
AT oil temperature warning light (AWD only) 12 V—1.4 W
A.B.S. warning light 12 V—1.4 W
CHECK ENGINE warning light
(Malfunction indicator lamp)12 V—1.4 W
Oil pressure warning light 12 V—1.4 W
AIRBAG system warning light 12 V—1.4 W
Low fuel warning light 12 V—3W
FWD indicator light 12 V—1.4 W
TCS warning light 12 V—1.4 W
TCS indicator light 12 V—1.4 W
Turn signal indicator light 12 V—1.4 W (2 pieces)
Seat belt warning light 12 V—1.4 W
Door open warning light 12 V—1.4 W
Headlight beam indicator light 12 V—1.4 W
Meter illumination light12 V—3 W (2 pieces)
12 V—3.4 W (4 pieces)
Headlight 12 V—60/55 W (Halogen)
Front clearance light 12 V—5W
Turn signal lightFront 12 V—21 W
Rear 12 V—21 W
Tail/Stop light 12 V—5/21 W
Back-up light 12 V—21 W
High-mount stop light12 V—18 W (SEDAN), 12 V—13 W
(WAGON)
License plate light 12 V—5W
Room light 12 V—8W
Trunk room light (SEDAN) 12 V—5W
Luggage room light (WAGON) 12 V—5W
Spot light 12 V—8 W (2 pieces)
Glove box light 12 V—3.4 W
Ash tray illumination light 12 V—1.7 W
Selector lever illumination light (AT model) 12 V—1.7 W
2
6-2SPECIFICATIONS
1. Body Electrical

B: BULB REPLACEMENT
B6M0348A
1Tachometer and temperature
gauge illumination

2Oil pressure

3CHECK ENGINE (Malfunction Indi-
cator Light)

4Tachometer illumination

5Turn signal (RH)

6Headlight beam
7Door open

8Seat belt

9TCS (Operation indicator)

10Turn signal (LH)

11Speedometer illumination

12Speedometer and fuel gauge illumi-
nation
13Low fuel

14Charge

15Brake fluid level/parking brake

16FWD

17AT oil temperature

18ABS

19TCS (Warning)
34
6-2SERVICE PROCEDURE
13. Combination Meter

B6M0375A
B: INSPECTION
1. STARTER INTERRUPT RELAY
1) Disconnect connector of starter interrupt relay.
2) Connect battery to terminal No.1 and ground terminal
No. 2.
3) Check continuity between terminals as indicated in
table below:
When current flows. Between terminals
No. 3 and No. 5Continuity does not
exist.
When current does not flow. Between terminals
No. 3 and No. 5Continuity exists.
Between terminals
No. 1 and No. 2Continuity exists.
G6M0134
2. HEADLIGHT ALARM RELAY
1) Disconnect connector of headlight alarm relay.
2) Connect battery to terminal No. 1 and ground terminal
No. 2.
3) Check continuity between terminals as indicated in
table below:
When current flows. Between terminals
No. 3 and No. 5Continuity does not
exist.
Between terminals
No. 3 and No. 4Continuity exists.
When current does not flow. Between terminals
No. 3 and No. 5Continuity exists.
Between terminals
No. 3 and No. 4Continuity does not
exist.
Between terminals
No. 1 and No. 2Continuity exists.
B6M0376
3. ENGINE HOOD SWITCH
1) Disconnect connector of engine hood switch.
2) Check continuity between terminals when push rod is
pushed in 1.5 mm (0.059 in) of its stroke.
Terminal
Switch position12
When push rod is
pushed in.
When push rod is
released.
55
6-2SERVICE PROCEDURE
22. Security System

C: FUNCTION TEST
1. SECURITY SYSTEM OPERATION
1) Fully open all the door windows.
2) Turn the ignition switch to OFF and remove ignition key
from ignition switch.
3) Get out of the vehicle and lock the driver’s door using a
ignition key.
4) Check that the security indicator light illuminates.
5) When the security indicator light illuminates, wait for 30
seconds.
After 30 seconds, check that the light starts repeating 0.2
sec. ON and 2.4 sec. OFF sequence.
6) Unlock the driver’s door using the inside lock knob and
open the door.
Ensure that:
(1) the horn sounds and headlights flash intermittently
at 0.2 sec. ON and 0.6 sec. OFF. intervals, and
(2) the engine will not start even if the ignition switch
is turned to START.
7) Unlock the driver’s door one time using the ignition key.
Ensure the horn and headlights turn off.
8) Close and lock the driver’s door without using a ignition
key. (Set the inside lock knob to LOCK and then close the
door while lifting the outer handle).
Check that the security indicator light illuminates continu-
ously.
9) Within 30 seconds after the above step 8), unlock the
rear LH door using the inside lock knob and open the door.
Check that the security indicator light flashes at 0.5 sec.
intervals.
10) Close the rear LH door and lock the door using the
inside lock knob.
Check that the security indicator light illuminates continu-
ously.
11) Perform the above steps 9) and 10) on the rear RH
door and front RH door.
12) Within 30 seconds after above step 11) has been
finished, pull the engine hood opener lever and open the
engine hood.
Check that the security indicator light flashes at 0.5 sec.
intervals.
13) Close the engine hood completely.
Check that the security indicator light illuminates continu-
ously.
59
6-2SERVICE PROCEDURE
22. Security System