Page 81 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
[T8R3]
4-4d
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
F49
1
1
213
1
4
1
5
1
6
1
7
1
8
9
1
10
1
11
1
12
1
131
415
1
16
1
17
1
18
1
19
1
2
21
23
242526
728 SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
[T8R3]
4-4d
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
F49
1
1
213
1
4
1
5
1
6
1
7
1
8
9
1
10
1
11
1
12
1
131
415
1
16
1
17
1
18
1
19
1
2
21
23
242526
728](/manual-img/17/57434/w960_57434-80.png)
BRAKES
[ABS
5
.31
TYPE]
[T8R3]
4-4d
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
F49
1
1
213
1
4
1
5
1
6
1
7
1
8
9
1
10
1
11
1
12
1
131
415
1
16
1
17
1
18
1
19
1
2
21
23
242526
728293031
1
D
~
]LB4M1243A
181111
1
CHECK
INPUT
VOLTAGEOF
ABSCM&H/U
.
1)
Disconnect
connector
from
ABSCM&H/U
.
2)
Run
the
engine
at
idle
.
3)
Measure
voltage
between
ABSCM&H/U
connector
and
chassis
ground
.
Connector
&
terminal
(F49)
No
.
1
(+)
-
Chassis
ground
(-)
:
CHECK
:
Is
thevoltage
between
10
V
and
15V?
,rES
:
Go
to
step
8112
.
No
:
Repair
harness
connector
between
battery,igni-
tion
switch
and
ABSCM&H/U
.
181112
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
than0
.5
S2?
Go
to
step
8R3
.
No
:
Repair
ABSCM&H/U
ground
harness
.
18113
1
CHECK
POOR
CONTACT
IN
CONNECTORS
.
Is
there
poor
contact
in
connectors
between
generator,
battery
and
ABSCM&HIU?
c
Ref
.
to
FOREWORD
[T3C1
]
.*10
>
,rES
:
Repair
connector
.
No
:
Go
to
step
8114
.
59
Page 82 of 3342
4-4d
[rsRaj
BRAKES
[ABS
5
.31
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
1
8R4
I
CHECK
ABSCM&H/U
.
1)
Connect
all
connectors
.
2)
Erase
the
memory
.
3)
Perform
inspection
mode
.
4}
Read
outthe
trouble
code
.
Is
the
same
trouble
code
as
in
thecurrent
diagnosis
still
being
output?
,rES
:
Replace
ABSCM&H/U
.
No
:
Go
to
step
81145
.
8R5
CHECK
ANY
OTHER
TROUBLE
CODES
APPEARANCE
.
Are
other
trouble
codes
being
output?
Proceed
with
the
diagnosis
corresponding
to
the
trouble
code
.
A
temporary
poor
contact
.
60
Page 83 of 3342
4-4d
ITBSO1
BRAKES
[ABS
5
.31
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
S
:
TROUBLE
CODE
41
-
ABNORMAL
ABSCONTROL
MODULE
-
DIAGNOSIS
:
9
Faulty
ABSCM&H/U
.
TROUBLE
SYMPTOM
:
9
ABS
does
not
operate
.
WIRING
DIAGRAM
:
F49
ABS
control
module
and
hydraulic
control
unit
E
F49
123456789101112131415
16171819
20
2122
23
242526
2728293031
B4M1246
62
Page 84 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
Rsss1
4-4d
8
.
DiagnosticsChart
with
Trouble
Code
by
ABS
Warning,Light
M
1
23
45
6
718
1101111121131141151
1116117118119121211
9t,-73
24-
2526
71281203*
01311111
B4M1243A SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
Rsss1
4-4d
8
.
DiagnosticsChart
with
Trouble
Code
by
ABS
Warning,Light
M
1
23
45
6
718
1101111121131141151
1116117118119121211
9t,-73
24-
2526
71281203*
01311111
B4M1243A](/manual-img/17/57434/w960_57434-83.png)
BRAKES
[ABS
5
.31
TYPE]
Rsss1
4-4d
8
.
DiagnosticsChart
with
Trouble
Code
by
ABS
Warning,Light
M
1
23
45
6
718
1101111121131141151
1116117118119121211
'9t,-73
24-
2526
71281203*
01311111
B4M1243A
8S1
CHECK
GROUND
CIRCUIT
OF
ABSCM&H/U
.
1)
Turn
ignition
switch
to
OFF
.
2)
Disconnect
connector
from
ABSCM&H/U
.
3)
Measure
resistance
between
ABSCM&H/U
and
chassis
ground
.
Connector
&
terminal
(F49)
No
.
23
-
Chassis
ground
:
CHECK
;
Is
the
resistance
less
than
0
.5
0?
Go
to
step
8S2
.
No
:
Repair
ABSCM&H/U
ground
harness
.
8S2
CHECKPOOR
CONTACT
IN
CONNECTORS
.
CHECK
:
Is
there
poor
contact
in
connectors
between
battery,ignition
switch
and
ABSCM&HlU?
<
Ref
.
to
FOREWORD
[T3C1]
.*10
>
vES
:
Repair
connector
.
No
:
Go
tostep
8S3
.
8S3
CHECK
SOURCES
OF
SIGNAL
NOISE
.
CHECK
:
Is
thecar
telephone
orthe
wireless
transmit-
ter
properly
installed?
,rES
:
Go
to
step
8S4
.
No
:
Properly
install
thecar
telephone
or
the
wireless
transmitter
.
8S4
CHECK
SOURCES
OFSIGNAL
NOISE
.
CHECK
;
Are
noise
sources
(such
asan
antenna)
installed
near
the
sensorharness?
,rES
:
Install
the
noise
sources
apartfrom
the
sensor
harness
.
No
:
Go
to
step
8S5
.
8S5
I
CHECK
ABSCM&HIU
.
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?
Replace
ABSCM&H/U
.
No
:
Go
to
step
8S6
.
63
Page 85 of 3342
4-4d
Rsssi
BRAKES
[ABS
5
.31
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
8S6
CHECK
ANY
I
APPEARANCE
.THER
TROUBLE
CODES
CHECK
:
Are
other
trouble
codes
being
output?
,rES
:
Proceed
with
thediagnosis
corresponding
to
the
trouble
code
.
No
:
A
temporary
poor
contact
.
64
Page 86 of 3342
4-4d
[TSTO1
BRAKES
[ABS
5
.31
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
T
:
TROUBLE
CODE
42
-
SOURCE
VOLTAGE
IS
ABNORMAL
.
-
DIAGNOSIS
:
9
Power
source
voltage
of
the
ABSCM&H/U
is
low
or
high
.
TROUBLE
SYMPTOM
:
*
ABS
does
notoperate
.
WIRING
DIAGRAM
:
F49
SBF-4
FL1.25B
ABS
control
module
and
hydraulic
control
unit
F2
8100
IGN
sw
No
Fuse
8100
F49
12345678910111131415
1
1
2
1
3
1
4
151
16171819
20
2122
23
24
2526
1
11
1
12
1
13
1
14
11
51
16~
2128
2930
31
B4M1245
66
Generator
Page 87 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.3i
TYPE]
[T8T3]
4-4Q
8
.
DiagnosticsChart
with
Trouble
Code
by
ABS
Warning
Light
\
7<
1
o
~
-
%mnn>>fl
5
B4M0430
F49
1
234
5
6
7
819
110111112113114115
4
1
18
22112
W23193123
1 SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.3i
TYPE]
[T8T3]
4-4Q
8
.
DiagnosticsChart
with
Trouble
Code
by
ABS
Warning
Light
\
7<
1
o
~
-
%mnn>>fl
5
B4M0430
F49
1
234
5
6
7
819
110111112113114115
4
1
18
22112
W23193123
1](/manual-img/17/57434/w960_57434-86.png)
BRAKES
[ABS
5
.3i
TYPE]
[T8T3]
4-4Q
8
.
DiagnosticsChart
with
Trouble
Code
by
ABS
Warning
Light
\
7<
1
o
~
-
%mnn>>fl
5
B4M0430
F49
1
234
5
6
7
819
110111112113114115
4
1
18
22112
W23193123
1
24
1
25
1
26
L
F
a=--]
V
B4M1234A
18T1
I
CHECKGENERATOR
.
1)
Start
engine
.
2)
Idling
after
warm-up
.
3)
Measure
voltage
between
generator
B
terminal
and
chassis
ground
.
Terminal
Generator
B
terminal
-
Chassis
ground
:
CHECK
:
Is
thevoltage
between
10
V
and
17
V?
Go
to
step
8T2
.
No
:
Repair
generator
.
8T2
CHECK
BATTERY
TERMINAL
.
Turn
ignition
switch
to
OFF
.
CHECK
:
Are
the
positive
and
negative
battery
termi-
nals
tightly
clamped?
ves
:
Go
to
step
8T3
.
No
:
Tighten
the
clamp
of
terminal
.
8T3
CHECK
INPUT
VOLTAGE
OF
ABSCM&H/U
.
1)
Disconnect
connectorfrom
ABSCM&H/U
.
2)
Run
the
engine
at
idle
.
3)
Measure
voltage
between
ABSCM&H/U
connector
and
chassis
ground
.
Connector
&
terminal
(F49)
No
.
1
(+)
-
Chassis
ground
(
)
:
CHECK
:
Is
thevoltage
between
10
V
and
17
V?
YES
:
Go
to
step
8T4
.
No
:
Repair
harness
connector
between
battery,
igni-
tion
switch
and
ABSCM&H/U
.
67
Page 88 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
4-4d
[T8T4l
BRAKES
[ABS
5
.31
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
(~~O
a
1
23
4
567
819110111112113114115
16171819
2
1
23
2425
26
7
1281
2
91
]C
-_
84M1243A
$T4
I
SUBARU LEGACY 1997 Service Repair Manual
4-4d
[T8T4l
BRAKES
[ABS
5
.31
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
(~~O
a
1
23
4
567
819110111112113114115
16171819
2
1
23
2425
26
7
1281
2
91
]C
-_
84M1243A
$T4
I](/manual-img/17/57434/w960_57434-87.png)
4-4d
[T8T4l
BRAKES
[ABS
5
.31
TYPE]
8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light
(~~O
a
1
23
4
567
819110111112113114115
16171819
2
1
23
2425
26
7
1281
2
91
]C
-_
84M1243A
$T4
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
0?
vES
:
Go
to
step
8T5
.
No
:
Repair
ABSCM&H/U
ground
harness
.
CHECKPOOR
CONTACT
IN
CONNECTORS
.I
Is
there
poor
contact
in
connectors
between
generator,
battery
and
ABSCM&HIU?
<
Ref
.
to
FOREWORD
[T3C1]
.*10
>
Repair
connector
.
No
:
Go
to
step
8T6
.
18T6
i
CHECK
ABSCM&HIU
.
1)
Connect
ail
connectors
.
2)
Erase
the
memory
.
3)
Perform
inspection
mode
.
4)
Read
outthe
trouble
code
.
diagnosis
still
being
output?
,mss
:
Replace
ABSCM&H/U
.
No
:
Go
tostep
8T7
.
CHECK
;
Is
the
same
trouble
code
as
in
thecurrent
CHECK
ANY
OTHER
TROUBLE
CODES
APPEARANCE
.
CHECK
:
Are
other
trouble
codes
being
output?
Proceed
with
the
diagnosis
corresponding
to
the
trouble
code
.
No
:
A
temporarypoor
contact
.
68