Page 49 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
[r7Aal
4-4d
7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure
F49
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
9h0
1
11
1
12
1
13
1
1
411
516
1
17
1
18
1
1 SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
[r7Aal
4-4d
7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure
F49
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
9h0
1
11
1
12
1
13
1
1
411
516
1
17
1
18
1
1](/manual-img/17/57434/w960_57434-48.png)
BRAKES
[ABS
5
.31
TYPE]
[r7Aal
4-4d
7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure
F49
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
9h0
1
11
1
12
1
13
1
1
411
516
1
17
1
18
1
19
1
20
2
1
23
24
2526
728293031
D
-_
B4M
1243A
7A6
CHECK
BATTERY
NG
LIGHT
HARN
SSORT
OF
ABS
WARN-
1)
Turn
ignition
switch
to
OFF
.
2)
Measure
voltage
between
connector
(F2)
and
chassis
ground
.
Connector
&
terminal
(F2)
No
.
9
(+)
-
Chassis
ground
(
)
:
CHECK
:
Is
thevoltage
less
than3
V?
,rES
:
Go
to
step
7A7
.
No
:
Repair
wiring
harness
.
7A7
CHECK
BATTERY
(
NG
LIGHT
HARNESS
.
SHO
RT
OF
ABSWARN-
1)
Turn
ignition
switch
to
ON
.
2)
Measure
voltage
between
connector
(F2)
and
chassis
ground
.
Connector
&
terminal
(F2)
No
.
9
(+)
-
Chassis
ground
(
)
:
CHECK
:
Is
voltage
less
than3
V?
vES
:
Go
to
step
7A8
.
No
:
Repair
wiring
harness
.
7A8
CHECK
GROUND
CIRCUIT
OF
ABSCM&H/U
.
Measure
resistance
between
ABSCM&H/U
and
chassis
ground
.
Connector
&
terminal
(F49)
No
.
23
-
GND
:
CHECK
:
Is
theresistance
less
than0
.5
92?
,rES
:
Go
to
step
7A9
.
No
:
Repair
ABSCM&H/U
ground
harness
.
21
Page 50 of 3342
4-4d
[r7A9]
BRAKES
[ABS
5
.3i
TYPE]
7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure
7A9
CHECK
WIRING
HARNESS
.
Measure
resistance
between
connector
(F2)
and
chassis
ground
.
Connector
&
terminal
(F2)
No
.
9
-
Chassis
ground
:
CHECK
;
Is
the
resistance
less
than0
.5
11?
YES
:
Go
to
step
7A10
.
No
:
Repair
harness/connector
.
7A10
I
CHECK
POOR
CONTACT
IN
CONNECTORS
.
Turn
ignition
switchto
OFF
.
CHECK
:
Is
there
poor
contact
in
connectors
between
combination
meter
and
ABSCM&HIU?
<
Ref
.
to
FOREWORD
[T3C1]
.*10
>
ves
:
Repair
connector
.
No
:
Replace
ABSCM&HIU
.
22
Page 51 of 3342
4-4d
[T7BO1
BRAKES
[ABS
5
.31
TYPE]
7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure
B
:
ABS
WARNING
LIGHT
DOES
NOT
GO
OFF
.
DIAGNOSIS
:
e
ABS
warning
light
circuit
is
open
or
shorted
.
TROUBLE
SYMPTOM
:
e
When
starting
the
engine
and
while
ABS
warning
light
is
kept
ON
.
WIRING
DIAGRAM
:
F49
F2
8100
ABS
control
module
and
hydraulic
control
unit
Fuse
No
.18
Fuse
C
:0
No
.
5
837
i2
ABS
Combination
meter
O
Diagnosis
°
E
connector
gg~
Diagnosis
terminal
IGNsw
SBF-4
FL1.25B
w
Q
m
Fuse
SBF-3
No
.
19
882
8100
1
11
1213141
161
11
10
i1
1
11213141
9
10
11134111181920212
0
1
10111
1
F49
12345678910111131415
16171819
20
2122
2324
25
2627
1
28
1
29
1
30
1
31
1
B4M1230
24
Page 52 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
Cr7s3l
4-4d
7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure
Diagnosis
connector
--J
1
-1
Di
gnosis
terminals
B4MOBOOA
711311
CHECK
I
C SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
Cr7s3l
4-4d
7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure
Diagnosis
connector
--J
1
-1
Di
gnosis
terminals
B4MOBOOA
711311
CHECK
I
C](/manual-img/17/57434/w960_57434-51.png)
BRAKES
[ABS
5
.31
TYPE]
Cr7s3l
4-4d
7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure
Diagnosis
connector
--J
1
-1
Di
gnosis
terminals
B4MOBOOA
711311
CHECK
I
CONNECTOR
.
LLATION
OF
ABSCM&H/U
Turn
ignition
switch
to
OFF
.
CHECK
:
Is
ABSCM&HlU
connector
inserted
into
ABSCM
until
the
clamp
locks
onto
it?
,res
:
Go
to
step
71132
.
No
:
Insert
ABSCM&H/U
connector
into
ABSCM&H/U
until
the
clamp
locks
onto
it
.
71132
CHECK
DIAGNOSIS
TERMINAL
.
Measure
resistance
between
diagnosis
terminals
(B81)
and
chassis
ground
.
CHECK
:
Terminals
Diagnosis
terminal
(A)
-
Chassis
ground
:
Diagnosis
terminal
(B)
-
Chassis
ground
:
Is
the
resistance
less
than
0
.5
92?
,rES
:
Go
to
step
71133
.
No
:
Repair
diagnosis
terminal
harness
.
171133
1
CHECK
DIAGNOSIS
LINE
.
1)
Turn
ignition
switch
to
OFF
.
2)
Connect
diagnosis
terminal
to
diagnosis
connector
(B82)
No
.
6
.
3)
Disconnect
connector
from
ABSCM&H/U
.
4)
Measure
resistance
between
ABSCM&H/U
connector
and
chassis
ground
.
CHECK
:
Connector
&
terminal
(F49)
No
.
4
-
Chassis
ground
:
Is
theresistance
less
than
0
.5
0?
,rES
:
Go
tostep
71134
.
No
:
Repair
harness
connector
between
ABSCM&H/U
and
diagnosis
connector
.
25
Page 53 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
4-4d
[T7BaI
BRAKES
[ABS
5
.3i
TYPE]
7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure
1~
\
MV
B4M0430
71134
CHECKGENERATOR
.
1)
Start
the
engine
.
2)
Idle
theen SUBARU LEGACY 1997 Service Repair Manual
4-4d
[T7BaI
BRAKES
[ABS
5
.3i
TYPE]
7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure
1~
\
MV
B4M0430
71134
CHECKGENERATOR
.
1)
Start
the
engine
.
2)
Idle
theen](/manual-img/17/57434/w960_57434-52.png)
4-4d
[T7BaI
BRAKES
[ABS
5
.3i
TYPE]
7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure
1~
\
MV
B4M0430
71134
CHECKGENERATOR
.
1)
Start
the
engine
.
2)
Idle
theengine
.
3)
Measure
voltage
between
generator
and
chassis
ground
.
Terminal
Generator
8
terminal
(+)
-
Chassis
ground
(
)
:
CHECK
;
Is
the
voltage
between
10
and
15
V?
vES
:
Go
to
step
7B5
.
No
:
Repair
generator
.
7B5
CHECK
BATTERY
TERMINAL
.
Turn
ignition
switch
to
OFF
.
CHECK
:
Is
there
poor
contact
at
battery
terminal?
,rES
:
Repair
battery
terminal
.
No
:
Go
to
step
7B6
.
71136
CHECK
POWER
SUPPLY
OF
ABSCM
.
1)
Disconnect
connector
from
ABSCM&H/U
.
2)
Start
engine
.
3)
Idle
the
engine
.
4)
Measure
voltage
between
ABSCM&H/U
connector
and
chassis
ground
.
Connector
&
terminal
(F49)
No
.
1
(+)
-
Chassis
ground
(-)
:
CHECK
:
Is
thevoltage
between
10
and
15
V?
ves
:
Go
to
step
71137
.
No
:
Repair
ABSCM&H/U
power
supply
circuit
.
71137
1
CHECK
WIRING
HARNESS
.
1)
Disconnect
connector
(F2)
from
connector
(B100)
.
2)
Turn
ignition
switch
to
ON
.
CHECK
:
Does
the
ABS
warning
light
remain
off?
S
:
Go
to
step
7B8
.
No
:
Repair
front
wiring
harness
.
26
Page 54 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
[T7B121
4-4d
7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure
7B8
CHECK
PROJECTIONAT
ABSCM&H/U
.
1)
Turn
ignition
switch
to
OFF
.
2)
Check SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
[T7B121
4-4d
7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure
7B8
CHECK
PROJECTIONAT
ABSCM&H/U
.
1)
Turn
ignition
switch
to
OFF
.
2)
Check](/manual-img/17/57434/w960_57434-53.png)
BRAKES
[ABS
5
.31
TYPE]
[T7B121
4-4d
7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure
7B8
CHECK
PROJECTIONAT
ABSCM&H/U
.
1)
Turn
ignition
switch
to
OFF
.
2)
Check
for
broken
projection
at
the
ABSCM&H/U
termi
nal
.
CHECK
:
Are
the
projection
broken?
,res
:
Go
to
step
7139
.
No
:
Replace
ABSCM&H/U
.
-,
,
00000
~
o
00000
a
oooo1
~oo
oi
"
ooo~~
IIII
`'84M1237A
0
F2
B4M1236A
I
F2
5
4
320
9
1
8
1
7
1
6
1
190
80
7
0
6
~
5
413211
]L
B4M1236A
171319
I
CHECK
ABSCM&H/U
.
Measure
resistance
between
ABSCM&H/U
terminals
.
Terminals
No
.
21
-
No
.
23
:
CHECK
:
Is
the
resistance
more
than
1
MS2?
vES
:
Go
to
step
7810
.
No
:
Replace
ABSCM&H/U
.
7810
CHECK
WIRING
HARNESS
.
Measure
resistance
between
connector
(F2)
and
chassis
ground
.
Connector
&
terminal
(F2)
No
.
9
-
Chassis
ground
:
CHECK
:
Is
the
resistance
less
than0
.5
S2?
vES
:
Go
to
step
7811
.
No
:
Repair
harness
.
7811
CHECK
WIRING
HARNESS
.
1)
Connect
connector
to
ABSCM&H/U
.
2)
Measure
resistance
between
connector
(F2)
and
chas-
sis
ground
.
Connector
&
terminal
(F2)
No
.
9
-
Chassis
ground
:
CHECK
:
Is
the
resistance
more
than
1
MS2?
YES
:
Go
to
step
7812
.
No
:
Repair
harness
.
POOR
CONTACT
IN
ABSCM&H/U
7812
1
CONNECTOR
.
CONNECTOR
.
CHECK
:
Is
there
poor
contact
in
ABSCM&HlU
connec-
tor?
<
Ref
.
to
FOREWORD
[T3C1]
.*10
>
,rES
:
Repair
connector
.
No
:
Replace
ABSCM&H/U
.
27
Page 55 of 3342
4-4d
[-nco]
BRAKES
[ABS
5
.31
TYPE]
7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure
C
:
TROUBLE
CODE
DOES
NOTAPPEAR
.
DIAGNOSIS
:
9
Diagnosis
circuit
is
open
.
TROUBLE
SYMPTOM
:
*
The
ABS
warning
light
turns
on
or
off
normally
butthe
start
code
cannot
be
read
out
in
the
diagnostic
mode
.
WIRING
DIAGRAM
:
F49
F2
B100
ABS
control
module
and
hydraulic
control
unit
Fuse
No
.
18
Fuse
v
w
c
:
i14
No
.
15
ABS
Combination
meter
oDiagnosis°E
connector
Diagnosis
terminal
B82
8100
11
11
1
1
21
1
31
14
1
1111
1910
i1
1
9
10
11
111
1
2
IGN
sw
SBF-4
FL1
.25B
rw
Q
m
Fuse
No
.19
SBF-3
0
1
4
10111
1
F49
123456789101112131415
16171819
20
2122
2324
25
26
27
1
28
1
29
1
30
1
31
1
84M1230
I
28
Page 56 of 3342

BRAKES
LABS
5
.31
TYNCJ
Lncs1
'4-ta
7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure
Diagnosisconnector
--J
1-
\~
--~
31
--L
Diagnosis
terminas
S2
B4MOSOOA
7C1
CHECK
DIAGNOSIS
TERMINAL
.
Measure
resistance
between
diagnosis
terminals
(B81)
and
chassis
ground
.
Terminals
Diagnosis
terminal
(A)
-
Chassis
ground
:
Diagnosis
terminal
(B)
-
Chassis
ground
.
E
CHECK
:
Is
the
resistance
less
than
0
.5
fl?
C~
;-E-~s
:
Go
to
step
7C2
.
No
:
Repair
diagnosis
terminal
harness
.
CHECK
DIAGNOSIS
LINE
.
1)
Turn
ignition
switchto
OFF
.
2)
Connect
diagnosis
terminal
to
diagnosis
connector
(B82)
No
.
6
.
3)
Disconnect
connector
from
ABSCM&H/U
.
4)
Measure
resistance
between
ABSCM&H/U
connector
and
chassis
ground
.
Connector
&
terminal
(F49)
No
.
4
-
Chassis
ground
:
CHECK
:
Is
the
resistance
less
than0
.5
S2?
,rES
:
Go
to
step
7C3
.
No
:
Repair
harness
connector
between
ABSCM&H/U
and
diagnosis
connector
.
POOR
CONTACT
IN
ABSCM&H/U
7C3
1
CONNECTOR
.
CONNECTOR
.
CHECK
:
Is
there
poor
contact
in
ABSCM&HI
U
connec-
tor?
<
Ref
.
to
FOREWORD
[T3C1]
.*10
>
vES
:
Repair
connector
.
No
:
Replace
ABSCM&H/U
.
29