1997 SUBARU LEGACY ignition

BRAKES
[ABS
5
.3i
TYPE]
[T10AJ4]
4-4d

10
.
Diagnostics
Chart
with
Select
Monitor

G-SENS
(F
10)

2
.30
v

B4M0927
I

Front

r

0

B4M0917A

0

Front

a
B4M0918A

I10AJ1
CHECK
(
TURN
NG

LL
FOUR
WHEELS
FOR
FREE

CHECK
:
Have
the
wheels
been
turned
freely
such
as

when
the
vehicle
is
lifted
up,
or
operatedon
a
rolling
road?

,rES
:
The
ABS
is
normal
.
Erase
the
trouble
code
.

No
:
Go
to
step
10AJ2
.

J2
CHECK
OUTPUT

I
SEL
CT
MONITORF

G
SENSOR
USING

1)
Press
[F],
[1]
and
[0]
on
the
select
monitor
.

2)
Read
the
select
monitor
display
.

CHECK
:
Is
theindicated
reading
between
2
.1
and
2
.5

Vwhen
the
vehicle
is
in
horizontalposition?

ves
:
Go
to
step
10AJ3
.

No
:
Go
to
step
10AJ8
.

I10AJ3
CHECK
OUTPUT

(SELECT
MONITORF

G
SENSOR
USING

1)
Turn
ignition
switchto
OFF
.

2)
Remove
console
box
.

3)
Remove
G
sensorfrom
vehicle
.
(Do
notdisconnect

connector
.)

4)
Turn
ignition
switch
to
ON
.

5)
Press
[F],
[1]
and
[0]
on
the
select
monitor
.

6)
Read
the
select
monitor
display
.

CHECK
;
Is
theindicated
reading
between
3
.7
and
4
.1

V
when
G
sensor
is
inclined
forwards
to
90°?

Go
to
step
10AJ4
.

No
:
Replace
G
sensor
.

I10AJ4
CHECK
OUTPUT

I
SELECT
MONITOR

F
G
SENSOR
USING

Read
the
select
monitor
display
.

CHECK
:
Is
theindicated
reading
between
0
.5
and
0
.9

Vwhen
G
sensor
is
inclined
backwards
to

90°?

vES
:
Go
to
step
10AJ5
.

No
:
Replace
G
sensor
.

205

4-4d
(TyoAJs1
BRAKES
[ABS
5
.31
TYPE]
10
.
Diagnostics
Chart
with
Select
Monitor

1

E

1
21314151617181911011111211311411
JIS671
191201211221
1
23
1
24
1
25
1
26
75129136131
.1
.

-

1

2
t-
94M1261A_

110AJ5
I
CHECKPOOR
CONTACT
IN
CONNECTORS
.

Turn
ignition
switch
to
OFF
.

CHECK
:
Is
there
poor
contact
in
connector
between

ABSCM&HlU
and
G
sensor?
<
Ref
.
to
FORE-

WORD
[T3C1]
.*10
>

,mss
:
Repair
connector
.

No
:
Go
to
step
10AJ6
.

diagnosis
still
bung
output?

,mss
:
Replace
ABSCM&H/U
.

No
:
Go
to
step
10AJ7
.
(
10AJ6
I
CHECK
ABSCM&H/U
.

1)
Connect
all
connectors
.

2)
Erasethe
memory
.

3)
Perform
inspection
mode
.

4)
Read
out
the
trouble
code
.

CHECK
:
Is
the
same
trouble
code
as
in
the
current

10AJ7
CHECK
ANY

I
APPEARANCE

.THER
TROUBLE
CODES

CHECK
;
Are
other
trouble
codes
being
output?

vES
:
Proceed
with
the
diagnosis
corresponding
to
the

trouble
code
.

No
:
A
temporary
poor
contact
.

10AJ8
I
pUT
HAR
NESS
AND
GROUND
HARNE
SS
.

1)
Turn
ignition
switch
to
OFF
.

2)
Disconnect
connector
from
ABSCM&H/U
.

3)
Measure
resistance
between
ABSCM&H/U
connector

terminals
.

Connector
&
terminal

(F49)
No
.
30
-
No
.
28
:

CHECK
:
Is
theresistance
between
4
.3
and
4
.9
kS2?

Go
to
step
f0AJ9
.

No
:
Repair
harness/connector
between
G
sensor
and

ABSCM&H/U
.

206

BRAKES
[ABS
5
.31
TYPE]
[T10AJ11]
4-4d

10
.
Diagnostics
Chart
withSelect
Monitor

B4M0915

Front
\

0

84M0917A

0

Front

r
--

B4M0918A

1
10AJ9
I
CHECKG
SENSOR
.

1)
Remove
console
box
.

2)
Remove
G
sensorfrom
vehicle
.

3)
Connect
connector
to
G
sensor
.

4)
Connect
connector
to
ABSCM&H/U
.

5)
Turn
ignition
switch
to
ON
.

6)
Measure
voltage
between
G
sensor
connector
termi-

nals
.

Connector
&
terminal
(P11)
No
.
2
(+)
-
No
.
1
(-)
:

CHECK
;
Is
thevoltage
between
2
.1
and
2
.5
V
when
G

sensor
is
horizontal?

vES
:
Go
to
step
10AJ10
.

No
:
Replace
G
sensor
.
I
10AJ10
1
CHECK
G
SENSOR
.

Measure
voltage
between
G
sensor
connector
terminals
.

Connector
&
terminal
(P11)
No
.
2
(+)
-
No
.
1
(-)
:

CHECK
;
Is
thevoltage
between
3
.7
and
4
.1
V
when
G

sensor
is
inclined
forwards
to
90°?

Go
to
step
10AJ11
.

No
:
Replace
G
sensor
.

I10AJ77
(CHECK
G
SENSOR
.

Measure
voltage
between
G
sensor
connector
terminals
.

Connector
&
terminal
(P11)
No
.
2
(+)
-
No
.
1
(
)
:

CHECK
:
Is
thevoltage
between
0
.5
and
0
.9
V
when
G

sensor
is
inclined
backwards
to
90°?

,rES
:
Go
to
step
10AJ12
.

No
:
Replace
G
sensor
.

207

4-4d
[T1oAJ12]
BRAKES
[ABS
5
.31
TYPE]

10
.
Diagnostics
Chart
withSelect
Monitor

[
-k-
VO
J12
I
CHECK
ABSCM&H/U
.

1)
Turn
ignition
switch
to
OFF
.

2)
Connect
all
connectors
.

3)
Erasethe
memory
.

4)
Perform
inspection
mode
.

5)
Read
out
the
trouble
code
.

CHECK
:
is
the
same
trouble
code
as
in
the
current

diagnosis
still
being
output?

.rES
:
Replace
ABSCM&H/U
.

No
:
Go
to
step
10AJ13
.

10AJ13
CHECK
ANY
OTHER
TROUBLE
CODES

APPEARANCE
.

CHECK
;
J
Are
other
trouble
codes
being
output?

,rES
:
Proceed
with
the
diagnosis
corresponding
to
the

trouble
code
.

No
:
A
temporary
poor
contact
.

208

1. Foreword
This chapter describes major inspection and service pro-
cedures for the engine mounted on the body. For proce-
dures not found in this chapter, refer to the service proce-
dure section in the applicable chapter.
2. Ignition Timing
A: MEASUREMENT
1. 2200 cc MODEL
1) Warm-up the engine.
G2M0094
2) To check the ignition timing, connect a timing light to #1
cylinder spark plug cord, and illuminate the timing mark
with the timing light.
3) Start the engine at idle speed and check the ignition
timing.
If the timing is not correct, check the ignition control sys-
tem.
Ignition timing [BTDC/rpm]:
14°±8°/700 (MT)
20°±8°/700 (AT)
2. 2500 cc MODEL
CAUTION:
After warming-up, engine becomes very hot. Be care-
ful not to burn yourself during measurement.
1) Warm-up the engine.
B2M0750A
2) To check the ignition timing, connect a timing light to #1
cylinder spark plug cord, and illuminate the timing mark
with the timing light.
3) Start the engine at idle speed and check the ignition
timing.
If the timing is not correct, check the ignition control sys-
tem.
Ignition timing [BTDC/rpm]:
15°±8°/700
2
2-2
1. Foreword - 2. Ignition Timing

1. Foreword
This chapter describes major inspection and service pro-
cedures for the engine mounted on the body. For proce-
dures not found in this chapter, refer to the service proce-
dure section in the applicable chapter.
2. Ignition Timing
A: MEASUREMENT
1. 2200 cc MODEL
1) Warm-up the engine.
G2M0094
2) To check the ignition timing, connect a timing light to #1
cylinder spark plug cord, and illuminate the timing mark
with the timing light.
3) Start the engine at idle speed and check the ignition
timing.
If the timing is not correct, check the ignition control sys-
tem.
Ignition timing [BTDC/rpm]:
14°±8°/700 (MT)
20°±8°/700 (AT)
2. 2500 cc MODEL
CAUTION:
After warming-up, engine becomes very hot. Be care-
ful not to burn yourself during measurement.
1) Warm-up the engine.
B2M0750A
2) To check the ignition timing, connect a timing light to #1
cylinder spark plug cord, and illuminate the timing mark
with the timing light.
3) Start the engine at idle speed and check the ignition
timing.
If the timing is not correct, check the ignition control sys-
tem.
Ignition timing [BTDC/rpm]:
15°±8°/700
2
2-2
1. Foreword - 2. Ignition Timing

3. Engine Idle Speed
A: MEASUREMENT
1) Before checking idle speed, check the following:
(1) Ensure that air cleaner element is free from
clogging, ignition timing is correct, spark plugs are in
good condition, and that hoses are connected properly.
(2) Ensure that malfunction indicator light (CHECK
ENGINE light) does not illuminate.
2) Warm-up the engine.
G2M0096
3) Connect Subaru Select Monitor or the OBD-II general
scan tool to data link connector.
CAUTION:
When connecting Subaru Select Monitor, turn ignition
switch to OFF.
4) Start the engine and measure engine speed.
NOTE:
Engine speed is indicated on Subaru Select Monitor by
selecting “MODE F04”.
G2M0097
NOTE:

When using the OBD-II general scan tool, carefully read
its operation manual.

When Subaru Select Monitor is not used, attach the
pickup sensor on tachometer (Secondary pickup type) to
#1 cylinder spark plug cord.

This ignition system provides simultaneous ignition for
#1 and #2 plugs. It must be noted that some tachometers
may register twice that of actual engine speed.
5) Check idle speed when unloaded. (With headlights,
heater fan, rear defroster, radiator fan, air conditioning, etc.
OFF)
Idle speed (No load and gears in neutral (MT) or N or
P (AT) position):
700±100 rpm
6) Check idle speed when loaded. (Turn air conditioning
switch to “ON” and operate compressor for at least one
minute before measurement.)
Idle speed [A/C“ON”, no load and gears in neutral
(MT) or N or P (AT) position]:
850±50 rpm
CAUTION:
Never rotate idle adjusting screw. If idle speed is out
of specifications, refer to General On-board Diagnosis
Table under “2-7 On-Board Diagnostics II System”.
3
2-2
3. Engine Idle Speed

4. Engine Compression
A: MEASUREMENT
1. 2200 cc MODEL
1) After warming-up the engine, turn ignition switch to
OFF.
2) Make sure that the battery is fully charged.
3) Remove all the spark plugs.
4) Disconnect connectors from fuel injectors.
5) Fully open throttle valve.
6) Check the starter motor for satisfactory performance
and operation.
G2M0098
7) Hold the compression gauge tight against the spark
plug hole.
CAUTION:
When using a screw-in type compression gauge, the
screw (put into cylinder head spark plug hole) should
be less than 18 mm (0.71 in) long.
8) Crank the engine by means of the starter motor, and
read the maximum value on the gauge when the pointer is
steady.
9) Perform at least two measurements per cylinder, and
make sure that the values are correct.
Compression (200—300 rpm and fully open throttle):
Standard
1,079—1,275 kPa
(11.0—13.0 kg/cm
2, 156—185 psi)
Limit
883 kPa (9.0 kg/cm
2, 128 psi)
Difference between cylinders
196 kPa (2.0 kg/cm
2, 28 psi)
2. 2500 cc MODEL
CAUTION:
After warming-up, engine becomes very hot. Be care-
ful not to burn yourself during measurement.
1) After warming-up the engine, turn ignition switch to
OFF.
2) Make sure that the battery is fully charged.
3) Remove all the spark plugs. [W3E0].>
4) Disconnect connectors from fuel injectors.
4
2-2
4. Engine Compression