Page 177 of 3342
4-4d
[Tyoaao]
BRAKES
[ABS
5
.31
TYPE]
10
.
Diagnostics
Chart
with
Select
Monitor
D
"
NEW
51
(FBI)
V
.
RELAY
B4M0968
AA
:
TROUBLE
CODE
51
V
.
RELAY
-
ABNORMAL
VALVERELAY
-
DIAGNOSIS
:
Faulty
valve
relay
TROUBLE
SYMPTOM
:
9
ABS
does
not
operate
.
WIRING
DIAGRAM
:
ABS
control
module
and
hydraulic
control
unit
Fuse
SBF-4
No
.
19
Valve
relay
F49
F2
8100
Fuse
IGNsw
SBF-4
FL1
.258
Motor
d
I
No
.18
vv
~
relay
l-
r
w
Qm
Solenoid
valve
FL
inlet
FL
outlet
FR
inlet
FR
outlet
RL
inlet
RL
outlet
RR
inlet
RR
outlet
Pump
motor
M
E
1~
F49
123456789101112131415
46
~
~
16111819
20
2122
23242526
1
11
1
12
1
13
11
4
1
51
1
61
1
71
1
81
1
912
0
1
2728293031
84M1253
166
Page 178 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.3i
TYPE]
[T10AA3]
4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
F49
1
1
2
1
3
1415
1
6
1
7
1
8
9
01112131415
~I61718192
21
23
4
1
2526
1281261301311
LeRVI
B4M1254A
a
1121314151 SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.3i
TYPE]
[T10AA3]
4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
F49
1
1
2
1
3
1415
1
6
1
7
1
8
9
01112131415
~I61718192
21
23
4
1
2526
1281261301311
LeRVI
B4M1254A
a
1121314151](/manual-img/17/57434/w960_57434-177.png)
BRAKES
[ABS
5
.3i
TYPE]
[T10AA3]
4-4d
10
.
Diagnostics
Chart
with
Select
Monitor
F49
1
1
2
1
3
1415
1
6
1
7
1
8
9
01112131415
~I61718192
21
23
4
1
2526
1281261301311
LeRVI
B4M1254A
a
112131415161718
9l101111121131141151
11611711811912
1_~23
1
242526
728293031
D
n
SL
f
B4M1243A
1
10AA1
I
CHECK
INPUT
VOLTAGE
OF
ABSCM&H/U
.
1)
Turn
ignition
switch
to
OFF
.
2)
Disconnect
connector
from
ABSCM&H/U
.
3)
Run
the
engine
atidle
.
4)
Measure
voltage
between
ABSCM&H/U
connector
and
chassis
ground
.
Connector
&
terminal
(F49)
No
.
1
(+)
-
Chassis
ground
(
)
:
(F49)
No
.
24
(+)
-
Chassis
ground
(-)
:
CHECK
:
Is
thevoltage
between
10
V
and
15
V?
,rES
:
GO
t0
step
10AA2
.
No
:
Repair
harness
connector
between
battery
and
ABSCM&H/U
.
I
10AA2
I
CHECK
GROUND
CIRCUIT
OF
ABSCM&HIU
.
1)
Turn
ignition
switchto
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
SZ?
0
:
Go
to
step
10AA3
.
No
:
Repair
ABSCM&H/U
ground
harness
.
I
10AA3
I
CHECKPOOR
CONTACT
IN
CONNECTORS
.
I
CHECK
:
Is
there
poor
contact
in
connectors
between
generator,
battery
and
ABSCM&HlU?
<
Ref
.
to
FOREWORD
[T3C1]
.*10>
vES
:
Repair
connector
.
No
:
Go
tostep
10AA4
.
167
Page 179 of 3342
4-4d
[TIoaaa]
BRAKES
[ABS
5
.3i
TYPE]
10
.
Diagnostics
Chart
withSelect
Monitor
J
10AA4
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?
ves
:
Replace
ABSCM&H/U
.
No
:
Go
to
step
10AA5
.
10AA5
CHECK
ANY
OTHER
TROUBLE
CODES
APPEARANCE
.
CHECK
;
Are
other
trouble
codes
being
output?
,rES
:
Proceed
with
thediagnosis
corresponding
to
the
trouble
code
.
No
:
A
temporary
poor
contact
.
168
Page 180 of 3342
4-4d
[ryonBO1
BRAKES
[ABS
5
.31
TYPE]
10
.
Diagnostics
Chart
withSelect
Monitor
D~NEW
51
(FBI)
V
.RELAY
ON
B4M0802
AB
:
TROUBLE
CODE
51
V
.
RELAY
ON
-
VALVE
RELAY
ON
FAILURE
-
DIAGNOSIS
:
Faulty
valve
relay
TROUBLE
SYMPTOM
:
*
ABS
does
not
operate
.
WIRING
DIAGRAM
:
ABS
control
module
and
hydraulic
control
unit
Fuse
SBF-4
w-
No
.19
Valve
b
relay
~
F49
0
8100
Fuse
IGN
sw
SBF-4
FL1.258
Motor
No
.18v
~v
relay
w
Qm
Solenoid
valve
FL
inlet
FL
outlet
FR
inlet
FR
outlet
RL
inlet
RL
outlet
RR
inlet
RR
outlet
Pump
motor
M
E
F49
1234567891011113141
1
it
i
~-
76819309
;0
122
23
24
B4M1253
170
Page 181 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
[T10AB4]
4-4d
10
.
Diagnostics
Chart
withSelect
Monitor
00000
E9
c][~oo
0000000
000000
1313109
130
e
`"/
II
I
F
I
`B4M1272A
10AB1
CHECK
VALVERELAY
IN
ABSCM&H/U
.
Measur SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5
.31
TYPE]
[T10AB4]
4-4d
10
.
Diagnostics
Chart
withSelect
Monitor
00000
E9
c][~oo
0000000
000000
1313109
130
e
`"/
II
I
F
I
`B4M1272A
10AB1
CHECK
VALVERELAY
IN
ABSCM&H/U
.
Measur](/manual-img/17/57434/w960_57434-180.png)
BRAKES
[ABS
5
.31
TYPE]
[T10AB4]
4-4d
10
.
Diagnostics
Chart
withSelect
Monitor
00000
E9
c]['~oo
0000000
000000
1313109
130
e
`"/
II
I
F
I
`'B4M1272A
10AB1
CHECK
VALVERELAY
IN
ABSCM&H/U
.
Measure
resistance
between
ABSCM&H/U
terminals
.
Terminals
No
.
23
(+)
-
No
.
24
(
)
:
CHECK
:
Is
theresistance
more
than
1
MS2?
vES
:
Go
to
step
10AB2
.
No
:
Replace
ABSCM&H/U
.
1
10AB2
I
CHECK
POOR
CONTACT
IN
CONNECTORS
.
Is
there
poor
contact
in
connectors
between
generator,battery
and
ABSCM&HIU?
<
Ref
.
to
FOREWORD
[T3C1]
.*10>
vES
:
Repair
connector
.
No
:
Go
to
step
10AB3
.
10AB3
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?
0
:
Replace
ABSCM&H/U
.
No
:
Go
to
step
10AB4
.
CODES
I10AB4
CHECK
ANY
IAPPEARANCE
.
O
THER
TROUBLE
CODES
CHECK
;
Are
other
trouble
codes
being
output?
Proceed
withthe
diagnosis
corresponding
to
the
trouble
code
.
No
:
A
temporary
poor
contact
.
171
Page 182 of 3342
4-4d
[T1oaco1
BRAKES
[ABS
5
.31
TYPE]
10
.
Diagnostics
Chart
with
Select
Monitor
D
"
NEW
52
(FBI)
M
.
RELAY
OPEN
B4M0969
AC
:
TROUBLE
CODE
52
M
.
RELAY
OPEN
-
OPEN
CIRCUIT
OF
MOTOR
RELAY
-
DIAGNOSIS
:
Faulty
motor
"
Faulty
motor
relay
"
Faulty
harness
connector
TROUBLE
SYMPTOM
:
9
ABS
does
not
operate
.
WIRING
DIAGRAM
:
ABS
control
moduleand
hydraulic
control
unit
SBF-6
100
12131415]
r-n
t0
1
11
11
Z1
1
3114
1
11
61
1
71181
19
1201
f"9
1
3456789111111415
1
16
1
17
1
18
1
19
14
21
1"'1
4
125
U
7
12812
9
13013
1
1
B4M
1255
172
Page 183 of 3342
![SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5,3i
TYPE]
[T10AC3]
4-4d
10
.
DiagnosticsChart
with
Select
Monitor
(~4~)
11
21
3141516171819
110111112113114115
1110171101912012112-
128129301311
23
1
24
1
25
1
26
v
BW
1256A
F49
1
SUBARU LEGACY 1997 Service Repair Manual
BRAKES
[ABS
5,3i
TYPE]
[T10AC3]
4-4d
10
.
DiagnosticsChart
with
Select
Monitor
(~4~)
11
21
3141516171819
110111112113114115
1110171101912012112-
128129301311
23
1
24
1
25
1
26
v
BW
1256A
F49
1](/manual-img/17/57434/w960_57434-182.png)
BRAKES
[ABS
5,3i
TYPE]
[T10AC3]
4-4d
10
.
DiagnosticsChart
with
Select
Monitor
(~4~)
11
21
3141516171819
110111112113114115
1110171101912012112-
128129301311
23
1
24
1
25
1
26
v
BW
1256A
F49
1
234
5
6
7
8
9
101112131415
61
1819
2
21
26
7
8293
31
23
2425
1
D
n
]L
B4M1257A
10AC1
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
the
voltage
between
10
V
and
13
V?
Go
to
step
10AC2
.
No
:
Repair
harness/connector
between
battery
and
ABSCM&H/U
and
check
fuse
SBF6
.
1
10AC2
I
CHECK
GROUND
CIRCUIT
OF
MOTOR
.
I
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
theresistance
less
than0
.5
S2?
,rES
:
Go
to
step
10AC3
.
No
:
Repair
ABSCM&H/U
ground
harness
.
1
10AC3
I
CHECK
MOTOR
OPERATION
.I
Operate
tine
check
sequence
.
<
Ref
.
to
4-4
[W25D1
].
>
NOTE
:
Use
the
diagnosis
connector
to
operate
the
sequence
control
.
Can
motor
revolution
noise
(buzz)
be
heard
when
carrying
out
the
check
sequence?
Go
to
step
10AC4
.
No
:
Replace
ABSCM&H1U
.
173
Page 184 of 3342
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