1997 SUBARU LEGACY ignition

4-4d
[T1oaca1
BRAKES
[ABS
5
.31
TYPE]

10
.
Diagnostics
Chart
withSelect
Monitor

10AC4
CHECK
POOR
CONTACT
IN
CONNECTORS
.

Turn
ignition
switch
to
OFF
.

CHECK
:
Is
there
poor
contact
in
connector
between

hydraclic
unit,
relay
boxand
ABSCM&HlU?

<
Ref
.
to
FOREWORD
[T3C1]
.*10
>

ves
:
Repair
connector
.

No
:
Go
to
step
10AC5
.
1
10AC5
I
CHECK
ABSCM&H/U
.

1)
Connect
all
connectors
.

2)
Erase
the
memory
.

3)
Perform
inspection
mode
.

4)
Read
out
the
trouble
code
.

CHECK
:
Is
the
same
trouble
code
as
in
thecurrent

diagnosis
still
being
output?

YES
:
Replace
ABSCM&H/U
.

No
:
Go
to
step
10AC6
.

10AC6
I
CHECK

APPEARANCE

.THER
TROUBLE
CODES

Are
other
trouble
codes
being
output?

Proceed
with
the
diagnosis
corresponding
to
the

trouble
code
.

No
:
A
temporarypoor
contact
.

174

BRAKES
[ABS
5
.31
TYPE]
IT10AD5]
4-4d

10
.
Diagnostics
Chart
with
Select
Monitor

ABSCM&H/U

D
II
f"
---
oo~

i
B4M1270A

10AD1
CHECK
MOTOR
RELAY
IN
ABSCM&H/U
.

Measure
resistance
between
ABSCM&H/U
terminals
.

Terminals

No
.
25
-
No
.
26
:

CHECK
.
:
Is
the
resistance
more
than
1
MSZ?

.
Go
to
step
10AD2
.

No
:
Replace
ABSCM&H/U
.

10AD2
CHECK
MOTOR
OPERATION
.

Operate
the
sequence
control
.
<
Ref
.
to
4-4
[W25D1
]
.
>

CHECK
;
Can
motor
revolution
noise
(buzz)
be
heard

when
carrying
out
the
sequence
control?

Go
to
step
10AD3
.

No
:
Replace
ABSCM&H/U
.
1
10AD3
I
CHECK
POOR
CONTACT
IN
CONNECTORS
.I

Turn
ignition
switch
to
OFF
.

CHECK
:
Is
there
poor
contact
in
connector
between

hydraulic
unit,
relay
box
and
ABSCM&HlU?

<
Ref
.
to
FOREWORD
[T3C1]
.*10
>

,rss
:
Repair
connector
.

No
:
Go
to
step
10AD4
.

1
10AD4
I
CHECK
ABSCM&H/U
.

1)
Connect
all
connectors
.

2)
Erase
the
memory
.

3)
Perform
inspection
mode
.

4)
Read
outthe
trouble
code
.

diagnosis
stiff
being
output?

YES
:
Replace
ABSCM&H/U
.

No
:
Go
to
step
10AD5
.

CHECK
:
is
the
same
trouble
code
as
in
the
current

10AD5
CHECK
ANY
OTHER
TROUBLE
CODES

1APPEARANCE
.
I

Eck
&
-)
:
Are
other
trouble
codes
being
output?

Proceed
with
thediagnosis
corresponding
to
the

trouble
code
.

No
:
A
temporary
poor
contact
.

177

BRAKES
[ABS
5
.3i
TYPE]
(T10AE2]
4-4d

10
.
Diagnostics
Chart
with
Select
Monitor

(~4~)

11
21
3141516171819
1101111121131141151
11161171181191202112
12812913W11
23
1
24
1
26

v
B4MI256A

r-A
1121314151617181911011111211311
51
1617
8192
21
23
2425
26
728293031

D
n

5C

B4M
1257A

10AE1
CHECK
INPUT
VOLTAGEOF
ABSCM&H/U
.

1)
Turn
ignition
switch
to
OFF
.

2)
Disconnect
connector
from
ABSCM&H/U
.

3)
Turn
ignition
switch
to
ON
.

4)
Measure
voltage
between
ABSCM&H/U
connector
and

chassis
ground
.

Connector
&
terminal

(F49)
No
.
25
(+)
-
Chassis
ground
(
)
:

CHECK
:
Is
thevoltage
between
10
V
and
13
V?

,rES
:
Go
to
step
10AE2
.

No
:
Repair
harness/connector
between
battery
and

ABSCM&H/U
and
check
fuse
SBF6
.

10AE2
I
CHECK
GROUND
CIRCUIT
OF
MOTOR
.

1)
Turn
ignition
switch
to
OFF
.

2)
Measure
resistance
between
ABSCM&H/U
connector

and
chassis
ground
.

Connector
&
terminal

(F49)
No
.
26
-
Chassis
ground
:

CHECK
:
Is
the
resistance
less
than0
.5
SZ?

,rES
:
Go
to
step
10AE3
.

No
:
Repair
ABSCM&H/U
ground
harness
.

179

4-4d
[TyoAE3l
BRAKES
[ABS
5
.31
TYPE]

10
.
Diagnostics
Chart
withSelect
Monitor
F49

D

P)
V
44-
84M1234A
I

F49

1
1
2
3
1
4
1
5
1
6
1
7
1
89
101112131415
1
16
1
17
1
18
1
19
1
2
01
21
12-
L-12
7
12
8
1
2
00
31
1
2324
2526

1L
B4M
1243A

I10AE3]CHECK
INPUT
VOLTAGE
OF
ABSCM&HIU
.

1)
Run
the
engine
at
idle
.

2)
Measure
voltage
between
ABSCM&H/U
connector
and

chassis
ground
.

Connector
&
terminal

(F49)
No
.
1
(+)
-
Chassis
ground
(
)
:

CHECK
:
Is
thevoltage
between
10
V
and
15
V?

YES
:
Go
to
step
10AE4
.

No
:
Repair
harness
connector
between
battery,igni-
tion
switch
and
ABSCM&H/U
.
1
10AE4
I
CHECK
GROUND
CIRCUIT
OF
ABSCM&H/U
.

1)
Turn
ignition
switch
to
OFF
.

2)
Measure
resistance
between
ABSCM&H/U
connector

and
chassis
ground
.

Connector
&
terminal

(F49)
No
.
23
-
Chassis
ground
:

CHECK
;
Is
the
resistance
less
than
0
.5
fl?

Go
to
step
10AE5
.

No
:
Repair
ABSCM&H/U
ground
harness
.

10AE5
CHECK
MOTOR
OPERATION
.

Operate
the
sequence
control
.
<
Ref
.
to
4-4
[W25D1
]
.
>

NOTE
:

Use
the
diagnosis
connector
to
operate
the
sequence

control
.

CHECK
:
Can
motor
revolution
noise
(buzz)
be
heard

when
carrying
outthe
sequence
control?

,rES
:
Go
to
step
10AE6
.

No
:
Replace
hydraulic
unit
.

180

BRAKES
[ABS
5
.31
TYPE]
[T10AE8]
4-4d

10
.
DiagnosticsChart
with
Select
Monitor

1
10AE6
I
CHECK
POOR
CONTACT
IN
CONNECTORS
.

Turn
ignition
switch
to
OFF
.

CHECK
:
Is
there
poor
contact
in
connector
between

generator,
battery
and
ABSCM&HIU?
<
Ref
.

to
FOREWORD
[T3C1]
.*10
>

0
:
Repair
connector
.

No
:
Go
to
step
10AE7
.
1
10AE7
J
CHECK
ABSCM&HlU
.

1)
Connect
all
connectors
.

2)
Erase
the
memory
.

3)
Perform
inspection
mode
.

4)
Read
out
the
trouble
code
.

K
:
Is
the
same
trouble
code
as
in
thecurrent

diagnosis
still
being
output?

,rES
:
Replace
ABSCM&H/U
.

No
:
Go
to
step
10AE8
.

10AE8
CHECK
ANY
OTHER
TROUBLE
CODES

APPEARANCE
.

CHECK
:
Are
other
trouble
codes
being
output?

Proceed
with
the
diagnosis
corresponding
to
the

trouble
code
.

No
:
A
temporary
poor
contact
.

181

4-4d
fr1oAFa1
BRAKES
[ABS
5
.31
TYPE]

10
.
Diagnostics
Chart
withSelect
Monitor

10AF4I
CHECK
OPEN
CIRCUIT
IN
HARNESS
.

1)
Turn
ignition
switch
to
OFF
.

2)
Disconnect
connector
from
ABSCM&H/U
.

3)
Depress
brakepedal
.

4)
Measure
voltage
between
ABSCM&H/U
connector
and

chassis
ground
.

Connector
&
terminal

(F49)
No
.
2
-
Chassis
ground
:

CHECK
:
Is
thevoltage
between
10
V
and
15
V?

,rES
:
Go
tostep
10AF5
.

No
:
Repair
harness
between
stop
light
switch
and

ABSCM&H/U
connector
.

1
10AF5
I
CHECK
POOR
CONTACT
IN
CONNECTORS
.

CHECK
:
Is
there
poor
contact
in
connector
between

stop
light
switch
and
ABSCM&HIU?
<
Ref,
to

FOREWORD
[T3C1]
.*10
>

vES
:
Repair
connector
.

No
:
Go
tostep
10AF6
.

10AF6
I
CHECK
ABSCM&H/U
.

1)
Connect
all
connectors
.

2)
Erase
the
memory
.

3)
Perform
inspection
mode
.

4)
Read
out
the
trouble
code
.

Is
the
same
trouble
code
as
in
thecurrent

diagnosis
still
being
output?

Replace
ABSCM&H/U
.

No
:
Go
to
step
10AF7
.

I10AF7
CHECK
ANY

1APPEARANCE

.THER
TROUBLE
CODES

CHECK
:
Are
other
trouble
codes
being
output?

Proceed
with
the
diagnosis
corresponding
to
the

trouble
code
.

No
:
A
temporary
poor
contact
.

184

BRAKES
[ABS
5
.31
TYPE][T10AG14]
4-4d

10
.
Diagnostics
Chart
withSelect
Monitor

F49

1
23456
7
89
07112131415
1617118119120121122l--,
2
1
3
2425
2630

0

S2
B4M1261A

10AG11
I
PUT
HARNESS
A
DuGROUND
HARNESS
.T

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
kSZ?

Go
to
step
10AG12
.

No
:
Repair
harness/connector
between
G
sensor
and

ABSCM&H/U
.
I
10AG12
I
CHECK
POOR
CONTACT
IN
CONNECTORS
.

Is
there
poor
contact
in
connector
between

ABSCM&HlU
and
G
sensor?
<
ReL
to
FORE-

WORD
[T3C1].*T
0
>

Repair
connector
.

No
:
Go
to
step
10AG13
.
f
10AG13
I
CHECK
ABSCM&H/U
.

1)
Connect
all
connectors
.

2)
Erase
the
memory
.

3)
Perform
inspection
mode
.

4)
Read
out
the
trouble
code
.

CHECK
:
Is
the
same
trouble
code
as
in
the
current

diagnosis
still
being
output?

Replace
ABSCM&H/U
.

No
:
Go
to
step
10AG14
.

10AG14
CHECK
ANY
OTHER
TROUBLE
CODES

APPEARANCE
.

CHECK
:
Are
other
trouble
codes
being
output?

0
:
Proceed
with
thediagnosis
corresponding
to
the

trouble
code
.

No
:
A
temporary
poor
contact
.

189

4-4d
[T70AG15]
BRAKES
[ABS
5
.3i
TYPE]

10
.
Diagnostics
Chart
with
Select
Monitor

V_

B4MO91
1
B

1
2
3
4
567
89
1011
131415
1017118119120121
23
242526
8
301

D

S2
B4M
1261
A

I
10AG15
1
CHECK
INPUT
VOLTAGE
OF
G
SENSOR
.

1)
Turn
ignition
switch
to
OFF
.

2)
Remove
console
box
.

3)
Disconnect
G
sensor
from
body
.
(Do
not
disconnect

connector
.)

4)
Turn
ignition
switch
to
ON
.

5)
Measure
voltage
between
G
sensor
connector
termi-

nals
.

Connector
&
terminal

(P11)
No
.
i
(+)
-
No
.
3
(
)
:

CHECK
:
Is
the
voltage
between
4
.75
and
5
.25
V?

Go
to
step
10AG16
.

No
:
Repair
harness/connector
between
G
sensor
and

ABSCM&H/U
.

10AG16

I
P
UT
HARNESS
ANDUGROUND
HA
NESS
.T

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
the
resistance
between
4
.3
and
4
.9
kS2?

,res
:
Go
to
step
10AG17
.

No
:
Repair
harness/connector
between
G
sensor
and

ABSCM&H/U
.

190